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2018 Subaru Forester

Owner reports · Recalls · Investigations

More warning signs than most Forester years

Owner complaints for the 2018 Subaru Forester are substantially higher than the model-year median of 131.

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When problems were reported

Mileage at the reported incident

241 reports with mileage · 252 unknown

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Visibility/wiper. Review the 135 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Air Bags. Review the 96 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 70 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

26 crash reports1 fire reports6 injury reports

Engine complaints

31 reports
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Mileage unknown · Jun 23, 2023
EngineExterior LightingStructureCrashInjury

Front end collision with car making an illegal left in front of our Subaru. Our car hood, bumper, head lights, grill and parts of the engine were smashed, with liquid draining out of the engine. My husband (wearing a seatbelt) hit his knee and shoulder on impact. Airbags failed - Not a single airbag deployed. A police officer he…

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Front end collision with car making an illegal left in front of our Subaru. Our car hood, bumper, head lights, grill and parts of the engine were smashed, with liquid draining out of the engine. My husband (wearing a seatbelt) hit his knee and shoulder on impact. Airbags failed - Not a single airbag deployed. A police officer helped him move car parts out of the street. Safety was at risk because my husband hit the dash. Car is at an independent service center now. We need to know how to get it inspected. There were no warning lights on dash prior to impact.

NHTSA ODI #11528442

Mileage unknown · Dec 26, 2022
EngineFuel/propulsion SystemUnknown Or Other

In June 2022 I purchased a 2018 Subaru Forester Turbo Touring at Carmax. Soon after purchase the car hesitated a few times when I was turning. I was turning in front of oncoming traffic and it scared the ___ out of me. So I returned the car to CarMax and bought a similar replacement which is the VIN reported to you in this re…

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In June 2022 I purchased a 2018 Subaru Forester Turbo Touring at Carmax. Soon after purchase the car hesitated a few times when I was turning. I was turning in front of oncoming traffic and it scared the ___ out of me. So I returned the car to CarMax and bought a similar replacement which is the VIN reported to you in this report. After a couple of months, this car is now doing the same thing , generally when turning but sometimes when merging into traffic. I press the gas, the car moves a bit, then it just dies - there's nothing there, simply no response. It does not turn off, it is just powerless. Then a few seconds later it gets gas and we squeal to safety. However I am just dead in the water, usually in front of oncoming traffic, until it decides to move. Pumping the gas does not help. I took the first Subaru to CarMax for a check up but they found nothing wrong so I just returned it. I am taking the second one in in January. Because the problem is intermittent, it is hard to diagnose but there's definitely a terrifying problem. I thought I was going to die when I had that first one and now this one is developing the same problem. There are a few posts on Google about the same problem. Is there a recall? Have others reported the same problem? I would appreciate any feedback you might be able to provide.

NHTSA ODI #11498883

Mileage unknown · Aug 20, 2022
EngineFuel/propulsion SystemPower Train

I recently purchased a used Subaru Forester with about 92k miles. About two weeks after purchase, I took it to a Subaru dealership and a multi point inspection revealed a cracked catalytic converter. The tech stated that this was discovered by visual inspection. This failure causes a safety issue by leaking exhaust vapors into…

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I recently purchased a used Subaru Forester with about 92k miles. About two weeks after purchase, I took it to a Subaru dealership and a multi point inspection revealed a cracked catalytic converter. The tech stated that this was discovered by visual inspection. This failure causes a safety issue by leaking exhaust vapors into the cabin. This failure occurred with no warning lamps or messages/codes.

NHTSA ODI #11480357

38,000 miles · Jun 6, 2022
EngineFuel System, Gasoline

The contact owns a 2018 Subaru Forester. The contact stated while driving 30 MPH, the vehicle started shaking abnormally. The contact pulled over, stopped, turned off, and restarted the vehicle. After the vehicle was started, smoke started coming from the vehicle while several unknown warning lights illuminated. The vehicle was …

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The contact owns a 2018 Subaru Forester. The contact stated while driving 30 MPH, the vehicle started shaking abnormally. The contact pulled over, stopped, turned off, and restarted the vehicle. After the vehicle was started, smoke started coming from the vehicle while several unknown warning lights illuminated. The vehicle was towed to the dealer to be diagnosed. The contact was informed that the spark plugs needed to be replaced. The vehicle was then taken to an independent mechanic and the contact was informed that the fuel pump needed to be replaced. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 38,000.

NHTSA ODI #11467881

Mileage unknown · May 4, 2022
Engine

Smelled car exhaust entering the cabin, took to dealer for inspection. Exhaust manifold part is actually warped and separated from the engine (not gasket issue). Apparently this problem is known by the dealer service shops, but is undisclosed by Subaru. I was feeling quite sick for weeks without understanding the cause, now I dr…

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Smelled car exhaust entering the cabin, took to dealer for inspection. Exhaust manifold part is actually warped and separated from the engine (not gasket issue). Apparently this problem is known by the dealer service shops, but is undisclosed by Subaru. I was feeling quite sick for weeks without understanding the cause, now I drive the car with the windows open and the vent closed and feel much better (I am waiting for the part to arrive so the dealer can fix the issue). I am an engineer and described the issue as a defect, the dealer hedged and said they are not allowed to call it a "defect" since that implies it needs a recall.

NHTSA ODI #11463322

Mileage unknown · Feb 13, 2022
EngineFire

I was driving on a normal roadway when a pulley began to make a loud screaming sound. Then I heard two loud pops. I pulled to the side of the road. I found a melted serpentine belt. I replaced the belt and began to drive at a low speed. I noticed the Vehicle started to sputter. I pulled over and checked the engine. When I opened…

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I was driving on a normal roadway when a pulley began to make a loud screaming sound. Then I heard two loud pops. I pulled to the side of the road. I found a melted serpentine belt. I replaced the belt and began to drive at a low speed. I noticed the Vehicle started to sputter. I pulled over and checked the engine. When I opened the hood the AC compressor was sparking and 6-12 inch flames were shooting out. I turned off the engine and extinguished the fire. Vehicle operated like normal after replacing AC compressor. Concerned that it could have caught entire vehicle on fire. Condenser for same make and model is recalled but not for our specific vin. I have old AC pump as evidence. An argument could be made that my VIN should have been included in the recall.

NHTSA ODI #11451796

Mileage unknown · Sep 6, 2021
EngineVehicle Speed ControlCrash

Sudden unexplained acceleration incident. Car accelerated without input from driver and rear-ended a parked vehicle in front of the vehicle Eyesight system did not engage to warn or prevent impact with rear end of car in front. The vehicle was travelling at low speed and suddenly accelerated. This is dangerous because it does n…

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Sudden unexplained acceleration incident. Car accelerated without input from driver and rear-ended a parked vehicle in front of the vehicle Eyesight system did not engage to warn or prevent impact with rear end of car in front. The vehicle was travelling at low speed and suddenly accelerated. This is dangerous because it does not provide enough time to prevent from hitting an object in front of the vehicle like a car or person. The problem has not been reproduced by by the manufacturer who sent a technician who inspected the vehicle and could not find any saved info in the event data recorder or saved diagnostics codes. Complaints were filed with the dealership before the incident that the eyesight system did not appear to be functioning correctly. The first time this has happened was 6/02/2021 in the afternoon on a clear day on a clear pathway without any obstructions. The second time this happened was 9/06/2021. The second incident the vehicle accelerated while travelling at lo speed with the eyesight system briefly warning tone beeping. The brakes were applied quickly and the carr seemed almost to stall. The engine made a noise as the stalling conditions ended and the car went back to normal. Subaru filed a service request previously. SR# 1-70302162357.

NHTSA ODI #11431872

Mileage unknown · Sep 6, 2021
EngineVehicle Speed ControlCrash

Sudden unexplained acceleration incident. Car accelerated without input from driver and rear-ended a parked vehicle in front of the vehicle Eyesight system did not engage to warn or prevent impact with rear end of car in front. The vehicle was travelling at low speed and suddenly accelerated. This is dangerous because it does n…

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Sudden unexplained acceleration incident. Car accelerated without input from driver and rear-ended a parked vehicle in front of the vehicle Eyesight system did not engage to warn or prevent impact with rear end of car in front. The vehicle was travelling at low speed and suddenly accelerated. This is dangerous because it does not provide enough time to prevent from hitting an object in front of the vehicle like a car or person. The problem has not been reproduced by by the manufacturer who sent a technician who inspected the vehicle and could not find any saved info in the event data recorder or saved diagnostics codes. Complaints were filed with the dealership before the incident that the eyesight system did not appear to be functioning correctly. The first time this has happened was 6/02/2021 in the afternoon on a clear day on a clear pathway without any obstructions. The second time this happened was 9/06/2021. The second incident the vehicle accelerated while travelling at low speed with the eyesight system briefly warning tone beeping. The brakes were applied quickly and the car seemed almost to stall. The engine made a noise as the stalling conditions ended and the car went back to normal. Subaru filed a service report SR# 1-70302162357. State Farm opened a claim 3620R756C.

NHTSA ODI #11431870

Mileage unknown · Jun 9, 2021
EngineFuel/propulsion System

When applying gentle gas pressure at low speed car does not respond for 2-4 seconds, then lurches strongly forward as tho full throttle has been applied. Happens at random times. Dealer said nothing wrong when first happened 2 years ago. Was rare until today when it happened 6 times within 50 miles of city driving. Will see…

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When applying gentle gas pressure at low speed car does not respond for 2-4 seconds, then lurches strongly forward as tho full throttle has been applied. Happens at random times. Dealer said nothing wrong when first happened 2 years ago. Was rare until today when it happened 6 times within 50 miles of city driving. Will see dealer tomorrow. No warnings of any kind. Grave safety hazard as could be hit by traffic when trying to enter street or get out of somebodies way when car does't respond.

NHTSA ODI #11420349

65,000 miles · Apr 18, 2021
Engine

EXHAUST GASKET LEAK. ONLY NOTABLE WHEN COLD AS IT MAKES A WHISTLING SOUND. ISSUE HAS HAPPENED 2 TIMES

NHTSA ODI #11408648

Official recalls

3

21V587000 · Fuel System, Gasoline:delivery:fuel Pump

Jul 29, 2021

Subaru of America, Inc. (Subaru) is recalling certain 2019-2020 Ascent, 2018 Forester, 2018-2020 Impreza, Legacy, Outback, 2018-2019 BRZ, WRX, and Toyota 86 vehicles. The low-pressure fuel pump inside the fuel tank may fail.

Consequence & remedy

Consequence: Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.

Remedy: Dealers will replace the low-pressure fuel pump, free of charge. Owner notification letters were mailed September 24, 2021. Subaru and Toyota owners may call customer service at 1-844-373-6614. Subaru's number for this recall is WRG-21.

19V701000 · Air Bags:sensor:occupant Classification

Oct 3, 2019

Subaru of America, Inc. (Subaru) is recalling certain 2015-2018 Forester vehicles equipped with heated seats. An electrical connection in the front passenger seat for the Occupant Detection System (ODS) may loosen.

Consequence & remedy

Consequence: If the connection loosens, the front passenger airbag may deactivate even though the seat is occupied, increasing the risk of injury to the front passenger in the event of a crash.

Remedy: Subaru will notify owners, and dealers will inspect and, as necessary, replace the ODS sensor mat harness, free of charge. The recall began February 11, 2020. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WUM-98.

18V455000 · Equipment:other:labels; Tires

Jul 10, 2018

Subaru of America, Inc. (Subaru) is recalling certain 2018 Subaru Forester vehicles. The Certification Label may indicate the incorrect wheel size, tire size, and air pressure. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 110, "Tire Selection and Rims."

Consequence & remedy

Consequence: Installing incorrect tires or applying incorrect tire air pressure may increase the risk of a crash.

Remedy: Subaru will notify owners, and dealers will install a corrected label, free of charge. The recall began July 26, 2018. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WTS-78.

Additional source detail variants (2)

Equipment:other:labels

Subaru of America, Inc. (Subaru) is recalling certain 2018 Subaru Forester vehicles. The Certification Label may indicate the incorrect wheel size, tire size, and air pressure. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 110, "Tire Selection and Rims."

Consequence: Installing incorrect tires or applying incorrect tire air pressure may increase the risk of a crash.

Remedy: Subaru will notify owners, and dealers will install a corrected label, free of charge. The recall began July 26, 2018. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WTS-78.

Tires

Subaru of America, Inc. (Subaru) is recalling certain 2018 Subaru Forester vehicles. The Certification Label may indicate the incorrect wheel size, tire size, and air pressure. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 110, "Tire Selection and Rims."

Consequence: Installing incorrect tires or applying incorrect tire air pressure may increase the risk of a crash.

Remedy: Subaru will notify owners, and dealers will install a corrected label, free of charge. The recall began July 26, 2018. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WTS-78.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

1

PE19009 · Occupant Detection System (ods) Failure

Opened Aug 6, 2019 · Closed Jan 22, 2020

Status: closed (inferred from source dates) · Air Bags; Air Bags:frontal; Air Bags:frontal:passenger Side:inflator Module; Air Bags:sensor:occupant Classification

The Office of Defects Investigation (ODI) opened PE19-009 to investigate 51 complaints and additional Early Warning Report (EWR) data related to allegations of front passenger seat Occupant Detection System (ODS) malfunctions in model year (MY) 2016 through 2018 Subaru Forester vehicles. These vehicles use a capacitive type ODS, which is intended to classify the occupant of the passenger seat as either full-sized, small stature, a child seat or other object. The complaints reported the ODS failed to operate properly, the SRS (Supplemental Restraint System) warning light illuminated, and/or the ODS incorrectly suppressed (turned off) the front passenger air bag when the seat was occupied by a full-sized passenger. In a frontal crash that is sufficient to warrant deployment, a suppressed air bag may increase the risk of injury to the occupant of the seat.On August 14, 2019 ODI sent an Information Request (IR) to Subaru requesting information on the subject vehicles and MY 2014-2015 Subaru Forester vehicles.On October 3, 2019, Subaru submitted a Defect Information Report (DIR) to NHTSA describing a safety defect in the passenger-side front airbag Occupant Detection System (ODS) harness of 366,282 MY 2015-2018 Subaru Forester vehicles equipped with seat heaters.The DIR stated that over time, due to a decrease in contact pressure between the terminals in the ODS sensor mat harness, a temporarily unstable electrical connection may be possible. If the connection is temporarily unstable, the ODS may not properly determine the status of the right front seat occupant. If the ODS is unable to correctly determine the status of the front occupant, the airbag warning light may illuminate, and the front passenger airbag may deactivate even though the seat is occupied, increasing the risk of injury to the front passenger in the event of a crash.Using vehicle production data and field occurrence frequency, Subaru determined the potentially affected vehicle production range to be between January 20, 2015 ?and August 1, 2017.In addition, Subaru indicated that over 99 percent of the related MY 2015-2018 field reports with vehicles in the production range involved vehicles with seat heaters.NHTSA's analysis of complaint and warranty claim data showed 1,440 of the complaints and 11,672 of the claims involve vehicles with seat heaters that were built within the production range covered by Subaru's recall.In addition, NHTSA's analysis showed a complaint rate of 393.1 per hundred thousand vehicles for the recalled population and 89.0 for MY 2014 through 2018 vehicles that are not included in the recall. Analysis of warranty claim data found a claim rate of 3.2 percent for the recalled population and 0.3 percent for MY 2014 through 2018 vehicles that are not included in the recall.Subaru will instruct owners with Subaru Forester vehicles produced in the affected vehicle production range, to bring their vehicles to a dealer to have the sensor mat harness, inspected and replaced with a new part, including the seat cushion assembly, if necessary.Based on ODI's analysis, the actions taken by Subaru mitigate any unreasonable risk to safety posed by ODS sensor mat failures in the subject vehicles. For subject and peer vehicles outside the recall population and those equipped without seat heaters, ODI's analysis indicates that there is currently no safety-related defect trend. Given these circumstances, further use of the agency resources in this matter does not appear to be warranted. Accordingly, this investigation is closed.

Additional source detail variants (4)

Air Bags:frontal:passenger Side:inflator Module

The Office of Defects Investigation (ODI) opened PE19-009 to investigate 51 complaints and additional Early Warning Report (EWR) data related to allegations of front passenger seat Occupant Detection System (ODS) malfunctions in model year (MY) 2016 through 2018 Subaru Forester vehicles. These vehicles use a capacitive type ODS, which is intended to classify the occupant of the passenger seat as either full-sized, small stature, a child seat or other object. The complaints reported the ODS failed to operate properly, the SRS (Supplemental Restraint System) warning light illuminated, and/or the ODS incorrectly suppressed (turned off) the front passenger air bag when the seat was occupied by a full-sized passenger. In a frontal crash that is sufficient to warrant deployment, a suppressed air bag may increase the risk of injury to the occupant of the seat.On August 14, 2019 ODI sent an Information Request (IR) to Subaru requesting information on the subject vehicles and MY 2014-2015 Subaru Forester vehicles.On October 3, 2019, Subaru submitted a Defect Information Report (DIR) to NHTSA describing a safety defect in the passenger-side front airbag Occupant Detection System (ODS) harness of 366,282 MY 2015-2018 Subaru Forester vehicles equipped with seat heaters.The DIR stated that over time, due to a decrease in contact pressure between the terminals in the ODS sensor mat harness, a temporarily unstable electrical connection may be possible. If the connection is temporarily unstable, the ODS may not properly determine the status of the right front seat occupant. If the ODS is unable to correctly determine the status of the front occupant, the airbag warning light may illuminate, and the front passenger airbag may deactivate even though the seat is occupied, increasing the risk of injury to the front passenger in the event of a crash.Using vehicle production data and field occurrence frequency, Subaru determined the potentially affected vehicle production range to be between January 20, 2015 ?and August 1, 2017.In addition, Subaru indicated that over 99 percent of the related MY 2015-2018 field reports with vehicles in the production range involved vehicles with seat heaters.NHTSA's analysis of complaint and warranty claim data showed 1,440 of the complaints and 11,672 of the claims involve vehicles with seat heaters that were built within the production range covered by Subaru's recall.In addition, NHTSA's analysis showed a complaint rate of 393.1 per hundred thousand vehicles for the recalled population and 89.0 for MY 2014 through 2018 vehicles that are not included in the recall. Analysis of warranty claim data found a claim rate of 3.2 percent for the recalled population and 0.3 percent for MY 2014 through 2018 vehicles that are not included in the recall.Subaru will instruct owners with Subaru Forester vehicles produced in the affected vehicle production range, to bring their vehicles to a dealer to have the sensor mat harness, inspected and replaced with a new part, including the seat cushion assembly, if necessary.Based on ODI's analysis, the actions taken by Subaru mitigate any unreasonable risk to safety posed by ODS sensor mat failures in the subject vehicles. For subject and peer vehicles outside the recall population and those equipped without seat heaters, ODI's analysis indicates that there is currently no safety-related defect trend. Given these circumstances, further use of the agency resources in this matter does not appear to be warranted. Accordingly, this investigation is closed.

Air Bags:frontal

The Office of Defects Investigation (ODI) opened PE19-009 to investigate 51 complaints and additional Early Warning Report (EWR) data related to allegations of front passenger seat Occupant Detection System (ODS) malfunctions in model year (MY) 2016 through 2018 Subaru Forester vehicles. These vehicles use a capacitive type ODS, which is intended to classify the occupant of the passenger seat as either full-sized, small stature, a child seat or other object. The complaints reported the ODS failed to operate properly, the SRS (Supplemental Restraint System) warning light illuminated, and/or the ODS incorrectly suppressed (turned off) the front passenger air bag when the seat was occupied by a full-sized passenger. In a frontal crash that is sufficient to warrant deployment, a suppressed air bag may increase the risk of injury to the occupant of the seat.On August 14, 2019 ODI sent an Information Request (IR) to Subaru requesting information on the subject vehicles and MY 2014-2015 Subaru Forester vehicles.On October 3, 2019, Subaru submitted a Defect Information Report (DIR) to NHTSA describing a safety defect in the passenger-side front airbag Occupant Detection System (ODS) harness of 366,282 MY 2015-2018 Subaru Forester vehicles equipped with seat heaters.The DIR stated that over time, due to a decrease in contact pressure between the terminals in the ODS sensor mat harness, a temporarily unstable electrical connection may be possible. If the connection is temporarily unstable, the ODS may not properly determine the status of the right front seat occupant. If the ODS is unable to correctly determine the status of the front occupant, the airbag warning light may illuminate, and the front passenger airbag may deactivate even though the seat is occupied, increasing the risk of injury to the front passenger in the event of a crash.Using vehicle production data and field occurrence frequency, Subaru determined the potentially affected vehicle production range to be between January 20, 2015 ?and August 1, 2017.In addition, Subaru indicated that over 99 percent of the related MY 2015-2018 field reports with vehicles in the production range involved vehicles with seat heaters.NHTSA's analysis of complaint and warranty claim data showed 1,440 of the complaints and 11,672 of the claims involve vehicles with seat heaters that were built within the production range covered by Subaru's recall.In addition, NHTSA's analysis showed a complaint rate of 393.1 per hundred thousand vehicles for the recalled population and 89.0 for MY 2014 through 2018 vehicles that are not included in the recall. Analysis of warranty claim data found a claim rate of 3.2 percent for the recalled population and 0.3 percent for MY 2014 through 2018 vehicles that are not included in the recall.Subaru will instruct owners with Subaru Forester vehicles produced in the affected vehicle production range, to bring their vehicles to a dealer to have the sensor mat harness, inspected and replaced with a new part, including the seat cushion assembly, if necessary.Based on ODI's analysis, the actions taken by Subaru mitigate any unreasonable risk to safety posed by ODS sensor mat failures in the subject vehicles. For subject and peer vehicles outside the recall population and those equipped without seat heaters, ODI's analysis indicates that there is currently no safety-related defect trend. Given these circumstances, further use of the agency resources in this matter does not appear to be warranted. Accordingly, this investigation is closed.

Air Bags:sensor:occupant Classification

The Office of Defects Investigation (ODI) opened PE19-009 to investigate 51 complaints and additional Early Warning Report (EWR) data related to allegations of front passenger seat Occupant Detection System (ODS) malfunctions in model year (MY) 2016 through 2018 Subaru Forester vehicles. These vehicles use a capacitive type ODS, which is intended to classify the occupant of the passenger seat as either full-sized, small stature, a child seat or other object. The complaints reported the ODS failed to operate properly, the SRS (Supplemental Restraint System) warning light illuminated, and/or the ODS incorrectly suppressed (turned off) the front passenger air bag when the seat was occupied by a full-sized passenger. In a frontal crash that is sufficient to warrant deployment, a suppressed air bag may increase the risk of injury to the occupant of the seat.On August 14, 2019 ODI sent an Information Request (IR) to Subaru requesting information on the subject vehicles and MY 2014-2015 Subaru Forester vehicles.On October 3, 2019, Subaru submitted a Defect Information Report (DIR) to NHTSA describing a safety defect in the passenger-side front airbag Occupant Detection System (ODS) harness of 366,282 MY 2015-2018 Subaru Forester vehicles equipped with seat heaters.The DIR stated that over time, due to a decrease in contact pressure between the terminals in the ODS sensor mat harness, a temporarily unstable electrical connection may be possible. If the connection is temporarily unstable, the ODS may not properly determine the status of the right front seat occupant. If the ODS is unable to correctly determine the status of the front occupant, the airbag warning light may illuminate, and the front passenger airbag may deactivate even though the seat is occupied, increasing the risk of injury to the front passenger in the event of a crash.Using vehicle production data and field occurrence frequency, Subaru determined the potentially affected vehicle production range to be between January 20, 2015 ?and August 1, 2017.In addition, Subaru indicated that over 99 percent of the related MY 2015-2018 field reports with vehicles in the production range involved vehicles with seat heaters.NHTSA's analysis of complaint and warranty claim data showed 1,440 of the complaints and 11,672 of the claims involve vehicles with seat heaters that were built within the production range covered by Subaru's recall.In addition, NHTSA's analysis showed a complaint rate of 393.1 per hundred thousand vehicles for the recalled population and 89.0 for MY 2014 through 2018 vehicles that are not included in the recall. Analysis of warranty claim data found a claim rate of 3.2 percent for the recalled population and 0.3 percent for MY 2014 through 2018 vehicles that are not included in the recall.Subaru will instruct owners with Subaru Forester vehicles produced in the affected vehicle production range, to bring their vehicles to a dealer to have the sensor mat harness, inspected and replaced with a new part, including the seat cushion assembly, if necessary.Based on ODI's analysis, the actions taken by Subaru mitigate any unreasonable risk to safety posed by ODS sensor mat failures in the subject vehicles. For subject and peer vehicles outside the recall population and those equipped without seat heaters, ODI's analysis indicates that there is currently no safety-related defect trend. Given these circumstances, further use of the agency resources in this matter does not appear to be warranted. Accordingly, this investigation is closed.

Air Bags

The Office of Defects Investigation (ODI) opened PE19-009 to investigate 51 complaints and additional Early Warning Report (EWR) data related to allegations of front passenger seat Occupant Detection System (ODS) malfunctions in model year (MY) 2016 through 2018 Subaru Forester vehicles. These vehicles use a capacitive type ODS, which is intended to classify the occupant of the passenger seat as either full-sized, small stature, a child seat or other object. The complaints reported the ODS failed to operate properly, the SRS (Supplemental Restraint System) warning light illuminated, and/or the ODS incorrectly suppressed (turned off) the front passenger air bag when the seat was occupied by a full-sized passenger. In a frontal crash that is sufficient to warrant deployment, a suppressed air bag may increase the risk of injury to the occupant of the seat.On August 14, 2019 ODI sent an Information Request (IR) to Subaru requesting information on the subject vehicles and MY 2014-2015 Subaru Forester vehicles.On October 3, 2019, Subaru submitted a Defect Information Report (DIR) to NHTSA describing a safety defect in the passenger-side front airbag Occupant Detection System (ODS) harness of 366,282 MY 2015-2018 Subaru Forester vehicles equipped with seat heaters.The DIR stated that over time, due to a decrease in contact pressure between the terminals in the ODS sensor mat harness, a temporarily unstable electrical connection may be possible. If the connection is temporarily unstable, the ODS may not properly determine the status of the right front seat occupant. If the ODS is unable to correctly determine the status of the front occupant, the airbag warning light may illuminate, and the front passenger airbag may deactivate even though the seat is occupied, increasing the risk of injury to the front passenger in the event of a crash.Using vehicle production data and field occurrence frequency, Subaru determined the potentially affected vehicle production range to be between January 20, 2015 ?and August 1, 2017.In addition, Subaru indicated that over 99 percent of the related MY 2015-2018 field reports with vehicles in the production range involved vehicles with seat heaters.NHTSA's analysis of complaint and warranty claim data showed 1,440 of the complaints and 11,672 of the claims involve vehicles with seat heaters that were built within the production range covered by Subaru's recall.In addition, NHTSA's analysis showed a complaint rate of 393.1 per hundred thousand vehicles for the recalled population and 89.0 for MY 2014 through 2018 vehicles that are not included in the recall. Analysis of warranty claim data found a claim rate of 3.2 percent for the recalled population and 0.3 percent for MY 2014 through 2018 vehicles that are not included in the recall.Subaru will instruct owners with Subaru Forester vehicles produced in the affected vehicle production range, to bring their vehicles to a dealer to have the sensor mat harness, inspected and replaced with a new part, including the seat cushion assembly, if necessary.Based on ODI's analysis, the actions taken by Subaru mitigate any unreasonable risk to safety posed by ODS sensor mat failures in the subject vehicles. For subject and peer vehicles outside the recall population and those equipped without seat heaters, ODI's analysis indicates that there is currently no safety-related defect trend. Given these circumstances, further use of the agency resources in this matter does not appear to be warranted. Accordingly, this investigation is closed.

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