IllustrationBrakes went completely out while driving, absolutely terrifying. Pedal went straight to the floor and wouldn't stop. I had to manually downshift until it was under 5 mph and then it would barely stop.
2010 Hyundai Genesis
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 2010 Hyundai Genesis do not stand out strongly from the model-year median of 109.
About this comparison →How this year compares
Owner complaints by model year
Compare all Genesis years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
140–25K
2325–50K
1850–75K
1175–100K
8100–150K
3150K+
77 reports with mileage · 11 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.
- Service Brakes. Review the 25 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Electrical System. Review the 14 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Exterior Lighting. Review the 13 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
4 crash reports0 fire reports2 injury reports
Service Brakes complaints
25 reportsWhile attempting to brake on exit ramp off an interstate highway, the brake pedal was depressed almost to the floorboard with minimal slowing. The brakes were pumped several times with slowing vehicle speed. Fortunately, the exit ramp was long enough to allow a safe stop. Pedal remains soft and spongy. No warning lights are …
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While attempting to brake on exit ramp off an interstate highway, the brake pedal was depressed almost to the floorboard with minimal slowing. The brakes were pumped several times with slowing vehicle speed. Fortunately, the exit ramp was long enough to allow a safe stop. Pedal remains soft and spongy. No warning lights are on. Brakes functioned normally until this incident at 138,200 miles. However, master cylinder was replaced at 102,000 miles for a similar problem at an independent auto shop. I am awaiting a dealer repair time. [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).
TL* THE CONTACT OWNS A 2010 HYUNDAI GENESIS. THE CONTACT STATED THAT THE BRAKE LIGHTS FAILED TO ILLUMINATE. A DEALER HAD NOT DIAGNOSED THE VEHICLE. THE MANUFACTURER INDICATED THAT THE VEHICLE WAS SERVICED PER AN UNKNOWN RECALL CAMPAIGN IN 2014 AND 2016; HOWEVER, THE FAILURE PERSISTED. THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAI…
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TL* THE CONTACT OWNS A 2010 HYUNDAI GENESIS. THE CONTACT STATED THAT THE BRAKE LIGHTS FAILED TO ILLUMINATE. A DEALER HAD NOT DIAGNOSED THE VEHICLE. THE MANUFACTURER INDICATED THAT THE VEHICLE WAS SERVICED PER AN UNKNOWN RECALL CAMPAIGN IN 2014 AND 2016; HOWEVER, THE FAILURE PERSISTED. THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 13V113000 (SERVICE BRAKES, HYDRAULIC, EXTERIOR LIGHTING). THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 102,000.
TL* THE CONTACT OWNS A 2010 HYUNDAI GENESIS. WHILE DRIVING 25 MPH, THE BRAKES MALFUNCTIONED. THE CONTACT HAD TO DEPRESS THE BRAKE PEDAL TO THE FLOORBOARD IN ORDER TO STOP THE VEHICLE. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE ISSUE. THE FAILURE MILEAGE WAS 16,000.
AS I WAS DRIVING DOWN A MAJOR STREET TRAVELING AROUND 35 MPH, THE CAR IN FRONT OF ME BEGAN TO STOP. AS I BEGAN TO APPLY THE BRAKES, MY CAR'S PEDAL WENT TO THE FLOOR. I PUMPED THE BRAKES A FEW TIMES AND BEGAN TO GET SOME PRESSURE, BUT I WAS NOT ABLE TO STOP IN TIME BEFORE REAR ENDING THE CAR IN FRONT OF ME. I NEVER KNEW WHAT TH…
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AS I WAS DRIVING DOWN A MAJOR STREET TRAVELING AROUND 35 MPH, THE CAR IN FRONT OF ME BEGAN TO STOP. AS I BEGAN TO APPLY THE BRAKES, MY CAR'S PEDAL WENT TO THE FLOOR. I PUMPED THE BRAKES A FEW TIMES AND BEGAN TO GET SOME PRESSURE, BUT I WAS NOT ABLE TO STOP IN TIME BEFORE REAR ENDING THE CAR IN FRONT OF ME. I NEVER KNEW WHAT THE ISSUE WAS AND I COULDN'T GET THE PROBLEM TO DUPLICATE, BUT THE BRAKE PEDAL WAS SOFT SINCE THAT DAY. I HAVE CHANGED THE PADS, AND ROTORS, SO THOSE ARE NOT THE ISSUE. THIS WEEK, MY FUEL PUMP WENT OUT AND I TOOK THE CAR TO THE MECHANIC FOR THAT ISSUE. MY MECHANIC INFORMED ME THAT THE CAR NEEDED AN ABS PUMP. THE DEALERS ARE WELL AWARE OF THE ISSUE BECAUSE WHEN WE CHECKED THE PRICE OF THE PART ($2600), THE PARTS AGENT IMMEDIATELY KNEW THE PROBLEM. THERE ARE NUMEROUS COMPLAINTS ONLINE ABOUT THE EXACT SAME ISSUE. THIS IS TRULY A SAFETY ISSUE FOR THESE CARS. THERE ARE MANY COMPLAINTS ONLINE WITH THE SAME PROBLEM!!!!!!!
TL* THE CONTACT OWNS A 2010 HYUNDAI GENESIS. THE CONTACT STATED THAT APPROXIMATLEY 80% OF THE VEHICLE'S BRAKES FAILED WHILE DRIVING APPROXIMATELY 50 MPH. THE FAILURE OCCURRED WITHOUT WARNING. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS NOT DIAGNOSED. THE DEALER INFORMED THE CONTACT THAT THE VEHICLE WAS PREVIOUSLY REPAIRED A…
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TL* THE CONTACT OWNS A 2010 HYUNDAI GENESIS. THE CONTACT STATED THAT APPROXIMATLEY 80% OF THE VEHICLE'S BRAKES FAILED WHILE DRIVING APPROXIMATELY 50 MPH. THE FAILURE OCCURRED WITHOUT WARNING. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS NOT DIAGNOSED. THE DEALER INFORMED THE CONTACT THAT THE VEHICLE WAS PREVIOUSLY REPAIRED ACCORDING TO NHTSA CAMPAIGN NUMBER: 13V489000 (SERVICE BRAKES) IN FEBRUARY OF 2015. THE VEHICLE WAS NOT REAPIRED. THE MANUFACTURER WAS NOTFIED OF THE FAILURE. THE FAILURE MIELAGE WAS APPROXIMATELY 63,000.
TL* THE CONTACT OWNS A 2010 HYUNDAI GENESIS. WHILE DRIVING 40 MPH, THE BRAKE PEDAL WAS DEPRESSED AND TOOK A GREATER DISTANCE TO STOP THE VEHICLE. THE CONTACT HAD TO DEPRESS THE BRAKE PEDAL MULTIPLE TIMES IN ORDER TO GET THE VEHICLE TO STOP. THE VEHCILE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO WAS UNABLE TO DIAGNOSE OR REPAIR THE…
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TL* THE CONTACT OWNS A 2010 HYUNDAI GENESIS. WHILE DRIVING 40 MPH, THE BRAKE PEDAL WAS DEPRESSED AND TOOK A GREATER DISTANCE TO STOP THE VEHICLE. THE CONTACT HAD TO DEPRESS THE BRAKE PEDAL MULTIPLE TIMES IN ORDER TO GET THE VEHICLE TO STOP. THE VEHCILE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO WAS UNABLE TO DIAGNOSE OR REPAIR THE VEHICLE. THE FAILURE RECURRED AND THE VEHICLE WAS TAKEN TO A DEALER WHERE IT WAS DIAGNOSED THAT THE HYDRAULIC ELECTRONIC CONTROL UNIT (HECU) NEEDED TO BE REPLACED. THE VEHCILE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VEHICLE WAS PREVIOUSLY REPAIRED UNDER NHTSA CAMPAIGN NUMBER: 13V489000 (SERVICE BRAKES, HYDRAULIC). THE FAILURE MILEAGE WAS 38,000.
TL* THE CONTACT OWNS A 2010 HYUNDAI GENESIS. WHILE DRIVING, THE BRAKE PEDAL WAS DEPRESSED AND TRAVELED TO THE FLOORBOARD. AS A RESULT, THE VEHICLE CRASHED INTO A DITCH. THE VEHICLE WAS SERVICED UNDER NHTSA CAMPAIGN NUMBER: 13V489000 (SERVICE BRAKES, HYDRAULIC). THE AIR BAGS DID NOT DEPLOY. THERE WERE NO INJURIES AND A POLICE REP…
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TL* THE CONTACT OWNS A 2010 HYUNDAI GENESIS. WHILE DRIVING, THE BRAKE PEDAL WAS DEPRESSED AND TRAVELED TO THE FLOORBOARD. AS A RESULT, THE VEHICLE CRASHED INTO A DITCH. THE VEHICLE WAS SERVICED UNDER NHTSA CAMPAIGN NUMBER: 13V489000 (SERVICE BRAKES, HYDRAULIC). THE AIR BAGS DID NOT DEPLOY. THERE WERE NO INJURIES AND A POLICE REPORT WAS NOT FILED. THE VEHICLE WAS TOWED TO A DEALER WHERE IT WAS DIAGNOSED THAT THE HYDRAULIC ELECTRONIC CONTROL UNIT NEEDED TO BE REPLACED. THE PASSENGER FENDER NEEDED TO BE REPAIRED AND THE FRONT PASSENGER TIRE NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 52,000.
I WAS DRIVING ON SPRING CYPRESS RD (SPRING, TX) APPROACHING STATE HIGHWAY 249 AT 30 MPH, I STEPPED ON THE BRAKES AT THE INTERSECTION AND THE PEDAL WENT ALL THE WAY DOWN TO THE FLOOR. IF I DIDN'T START PUMPING THE BRAKES, I WOULD HAVE REAR ENDED CAR ON FRONT OF ME. IF THIS INCIDENT HAD HAPPENED WHILE I WAS ON THE SH249 FREEWAY,…
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I WAS DRIVING ON SPRING CYPRESS RD (SPRING, TX) APPROACHING STATE HIGHWAY 249 AT 30 MPH, I STEPPED ON THE BRAKES AT THE INTERSECTION AND THE PEDAL WENT ALL THE WAY DOWN TO THE FLOOR. IF I DIDN'T START PUMPING THE BRAKES, I WOULD HAVE REAR ENDED CAR ON FRONT OF ME. IF THIS INCIDENT HAD HAPPENED WHILE I WAS ON THE SH249 FREEWAY, I WOULDN'T BE HERE FILING THIS REPORT. I WAS ABLE TO DRIVE SLOWLY TO THE HYUNDAI DEALER USING SIDE ROADS.
BRAKE PEDAL GOES TO THE FLOOR WITHOUT MUCH EFFORT WHEN AT A FULL STOP OR IN MOTION. LITTLE TO NO ACTUAL BRAKING OCCURS UNTIL REACHING THE FULL TRAVEL OF THE PEDAL. THIS IS VERY DANGEROUS AND THE DEALERSHIP (BURNS HYUNDAI OF MARLTON NJ) ACKNOWLEDGED IT IS THE HYDRAULIC CONTROL UNIT, BUT REFUSES TO REPLACE UNDER THE 2013 RECALL …
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BRAKE PEDAL GOES TO THE FLOOR WITHOUT MUCH EFFORT WHEN AT A FULL STOP OR IN MOTION. LITTLE TO NO ACTUAL BRAKING OCCURS UNTIL REACHING THE FULL TRAVEL OF THE PEDAL. THIS IS VERY DANGEROUS AND THE DEALERSHIP (BURNS HYUNDAI OF MARLTON NJ) ACKNOWLEDGED IT IS THE HYDRAULIC CONTROL UNIT, BUT REFUSES TO REPLACE UNDER THE 2013 RECALL OF THE UNIT. THEY QUOTED ME AT $3,024.50.
Official recalls
314V713000 · Exterior Lighting:brake Lights:switch
Nov 7, 2014
Hyundai Motor America (Hyundai) is recalling certain 2009-2011 Hyundai Genesis vehicles manufactured April 30, 2008, to November 21, 2010, and 2011 Hyundai Equus vehicles manufactured July 31, 2010, to November 21, 2010. Due to a circuit failure, the stop lamps in the affected vehicles may not illuminate.
Consequence & remedy
Consequence: A following vehicle may not recognize that the vehicle is slowing or coming to a stop if the stop lamps on the vehicle do not illuminate as expected. There is an increased risk of a rear-end crash as a result.
Remedy: Hyundai will notify owners, and dealers will repair the stop lamp switch circuit, free of charge. Hyundai issued an interim notification to owners on January 6, 2015. The recall began on March 23, 2015. Owners may contact Hyundai customer service at 1-855-671-3059. Hyundai's number for this recall is 125.
13V489000 · Service Brakes, Hydraulic:fluid
Oct 29, 2013
Hyundai is recalling certain model year 2009-2012 Genesis vehicles manufactured April 30, 2008, through March 28, 2012. The vehicles may contain brake fluid which does not protect against corrosion of the Hydraulic Electronic Control Unit (HECU).
Consequence & remedy
Consequence: If the module corrodes, reduced brake effectiveness may result, increasing the risk of a crash.
Remedy: Hyundai will notify owners and instruct them to bring their vehicle to a dealer for service. Hyundai will inspect the HECU module for proper operation, and will replace the modules as necessary. Hyundai will replace the factory brake fluid in those vehicles that have not previously had the factory brake fluid replaced. These repairs will be done free of charge. The recall began on December 24, 2013. Owners may contact Hyundai at 1-800-633-5151 or by email at consumeraffairs@hmausa.com. Hyundai's recall number is 114.
13V113000 · Exterior Lighting:brake Lights:switch
Apr 1, 2013
Hyundai Motor Company (Hyundai) is recalling certain model year 2006-2009 Accent, model year 2007-2011 Azera, Sonata and Sante Fe,2006-2011 Tucson, 2009-2011 Elantra Touring, 2007-2010 Elantra, 2008-2011 Veracruz, 2009-2011 Genesis, 2010-2011 Genesis Coupe, 2007-2008 Entourage, and 2006-2008 Tiburon vehicles. Originally, in April 2013, Hyundai recalled 1,059,824 model year 2007-2009 Accent and Tucson, model year 2007-2010 Elantra, model year 2007-2011 Santa Fe, model year 2008-2009 Veracruz, model year 2010-2011 Genesis Coupe, and model year 2011 Sonata vehicles. In September 2013, Hyundai informed the agency that it was adding more vehicles to this campaign, representing an additional 652,512 units. The total number of vehicles being recalled is now 1,712,336. In the affected vehicles, the stop lamp switch may malfunction. A malfunctioning stop lamp switch may cause the brake lights to not illuminate when the brake pedal is depressed or may cause an inability to deactivate the cruise control by depressing the brake pedal. Additionally, a malfunctioning stop lamp switch may also result in intermittent operation of the push-button start feature, affect the operation of the brake transmission shift interlock feature, preventing the shifter from being moved out of the PARK position and cause the Electronic Stability Control (ESC) malfunction light to illuminate.
Consequence & remedy
Consequence: Failure to illuminate the stop lamps during braking or inability to disengage the cruise control could increase the risk of a crash. Additionally, when the ignition is in the 'ON' position, the transmission shifter may be able to be moved out of Park without first applying the brake. This may lead to unintentional movement of the car which may increase the risk of a crash.
Remedy: Hyundai will notify owners, and dealers will replace the stop lamp switch, free of charge. The safety recall began on April 22, 2013. Owners may contact Hyundai at 1-800-633-5151. Hyundai's recall campaign number is 110.
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
1PE13033 · Brake Hydraulic Control Module Failure
Opened Oct 17, 2013 · Closed Apr 4, 2014
Status: closed (inferred from source dates) · Service Brakes, Hydraulic; Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip; Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip:control Unit/module
On October 28, 2013, Hyundai Motor Company (Hyundai) submitted a Defect Information Report (DIR) to NHTSA describing a safety defect in the braking system of approximately 43,500 model year (MY) 2009 through 2012 Hyundai Genesis sedans (NHTSA Recall No. 13V-489).The Hyundai report indicates that the recalled vehicles may contain brake fluid that does not sufficiently inhibit corrosion on the zinc plating of control valve armatures in the Hydraulic Electronic Control Unit (HECU) module. The DIR indicated that, over time, the build-up of corrosion products may affect operation of HECU control valves, resulting in a low/soft brake pedal with reduced brake effectiveness, which may increase the risk of a crash.In October 2011, the HECU supplier notified Hyundai that the brake fluid used in production plants was causing corrosion of valve armatures in the control module.The supplier changed the coating of the valve armatures in late March 2012 to correct the problem in production vehicles.Hyundai's recall includes Genesis vehicles produced prior to the implementation of the HECU change.In March 2013, Hyundai initiated a Service Campaign (TL6) to replace brake fluid in the subject vehicles with brake fluid with better corrosion resistance properties.According to Hyundai's DIR letter, after PE13-033 was opened, the company noted that some of the vehicles serviced in the TL6 campaign subsequently required HECU replacement.This was an indication that internal corrosion had progressed enough to affect valve operation and brake performance, prompting Hyundai to conduct a safety recall.Hyundai's repair procedures for 13V-489 require brake system flushing and replacement in all recalled vehicles with a new fluid containing the necessary corrosion inhibitor.In addition, for vehicles produced prior to June 1, 2010, dealers will perform an inspection procedure to verify that the HECU is functioning properly and replace units that do not meet the test requirements.Hyundai indicated that, based on analysis of claim data, only vehicles produced prior to June 1, 2010 have been in service long enough to require the additional inspection/replacement of the HECU. Analysis of failure data reported to NHTSA and provided by Hyundai in response to ODI's information request letter for PE13-033 identified 756 complaints and 1,683 warranty claims for 30,114 subject vehicles produced prior to June 1, 2010, resulting in a complaint rate of 25.1 incidents per thousand vehicles (IPTV) and a claim rate of 5.6 percent.The MY 2009 vehicles, with the longest exposure times, experienced the highest complaint (33.5 IPTV) and warranty (7.0 percent) rates.For the 45,639 subject vehicles produced after June 1, 2010, ODI identified 13 complaints and 34 warranty claims, resulting in a complaint rate of 0.3 IPTV and a warranty claim rate of 0.1 percent, indicating that the brake fluid corrosion concern had not progressed far enough to result in significant rates of brake system performance symptoms in those vehicles.This investigation is closed.ODI will continue to monitor complaints to evaluate the effectiveness of Hyundai's recall.The VOQs noted in the Failure Report are: 10569231, 10560898, 10560495, 10559360, 10558279, 10558264, 10556964, 10556631, 10556577, 10556322, 10554988, 10554802, 10554122, 10552958, 10551817, 10551157, 10551110, 10551092, 10550791, 10550773, 10550431, 10549750, 10549634, 10549629, 10549567, 10549402, 10549376, 10549270, 10549228, 10549186, 10549021, 10548903, 10548823, 10548791, 10548737, 10548722, 10548716, 10548705, 10546565, 10544803, 10543663, 10542962, 10541959, 10541741, 10538208, 10537934, 10536652, 105354
Additional source detail variants (3)
Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip:control Unit/module
On October 28, 2013, Hyundai Motor Company (Hyundai) submitted a Defect Information Report (DIR) to NHTSA describing a safety defect in the braking system of approximately 43,500 model year (MY) 2009 through 2012 Hyundai Genesis sedans (NHTSA Recall No. 13V-489).The Hyundai report indicates that the recalled vehicles may contain brake fluid that does not sufficiently inhibit corrosion on the zinc plating of control valve armatures in the Hydraulic Electronic Control Unit (HECU) module. The DIR indicated that, over time, the build-up of corrosion products may affect operation of HECU control valves, resulting in a low/soft brake pedal with reduced brake effectiveness, which may increase the risk of a crash.In October 2011, the HECU supplier notified Hyundai that the brake fluid used in production plants was causing corrosion of valve armatures in the control module.The supplier changed the coating of the valve armatures in late March 2012 to correct the problem in production vehicles.Hyundai's recall includes Genesis vehicles produced prior to the implementation of the HECU change.In March 2013, Hyundai initiated a Service Campaign (TL6) to replace brake fluid in the subject vehicles with brake fluid with better corrosion resistance properties.According to Hyundai's DIR letter, after PE13-033 was opened, the company noted that some of the vehicles serviced in the TL6 campaign subsequently required HECU replacement.This was an indication that internal corrosion had progressed enough to affect valve operation and brake performance, prompting Hyundai to conduct a safety recall.Hyundai's repair procedures for 13V-489 require brake system flushing and replacement in all recalled vehicles with a new fluid containing the necessary corrosion inhibitor.In addition, for vehicles produced prior to June 1, 2010, dealers will perform an inspection procedure to verify that the HECU is functioning properly and replace units that do not meet the test requirements.Hyundai indicated that, based on analysis of claim data, only vehicles produced prior to June 1, 2010 have been in service long enough to require the additional inspection/replacement of the HECU. Analysis of failure data reported to NHTSA and provided by Hyundai in response to ODI's information request letter for PE13-033 identified 756 complaints and 1,683 warranty claims for 30,114 subject vehicles produced prior to June 1, 2010, resulting in a complaint rate of 25.1 incidents per thousand vehicles (IPTV) and a claim rate of 5.6 percent.The MY 2009 vehicles, with the longest exposure times, experienced the highest complaint (33.5 IPTV) and warranty (7.0 percent) rates.For the 45,639 subject vehicles produced after June 1, 2010, ODI identified 13 complaints and 34 warranty claims, resulting in a complaint rate of 0.3 IPTV and a warranty claim rate of 0.1 percent, indicating that the brake fluid corrosion concern had not progressed far enough to result in significant rates of brake system performance symptoms in those vehicles.This investigation is closed.ODI will continue to monitor complaints to evaluate the effectiveness of Hyundai's recall.The VOQs noted in the Failure Report are: 10569231, 10560898, 10560495, 10559360, 10558279, 10558264, 10556964, 10556631, 10556577, 10556322, 10554988, 10554802, 10554122, 10552958, 10551817, 10551157, 10551110, 10551092, 10550791, 10550773, 10550431, 10549750, 10549634, 10549629, 10549567, 10549402, 10549376, 10549270, 10549228, 10549186, 10549021, 10548903, 10548823, 10548791, 10548737, 10548722, 10548716, 10548705, 10546565, 10544803, 10543663, 10542962, 10541959, 10541741, 10538208, 10537934, 10536652, 105354
Service Brakes, Hydraulic:antilock/traction Control/electronic Limited Slip
On October 28, 2013, Hyundai Motor Company (Hyundai) submitted a Defect Information Report (DIR) to NHTSA describing a safety defect in the braking system of approximately 43,500 model year (MY) 2009 through 2012 Hyundai Genesis sedans (NHTSA Recall No. 13V-489).The Hyundai report indicates that the recalled vehicles may contain brake fluid that does not sufficiently inhibit corrosion on the zinc plating of control valve armatures in the Hydraulic Electronic Control Unit (HECU) module. The DIR indicated that, over time, the build-up of corrosion products may affect operation of HECU control valves, resulting in a low/soft brake pedal with reduced brake effectiveness, which may increase the risk of a crash.In October 2011, the HECU supplier notified Hyundai that the brake fluid used in production plants was causing corrosion of valve armatures in the control module.The supplier changed the coating of the valve armatures in late March 2012 to correct the problem in production vehicles.Hyundai's recall includes Genesis vehicles produced prior to the implementation of the HECU change.In March 2013, Hyundai initiated a Service Campaign (TL6) to replace brake fluid in the subject vehicles with brake fluid with better corrosion resistance properties.According to Hyundai's DIR letter, after PE13-033 was opened, the company noted that some of the vehicles serviced in the TL6 campaign subsequently required HECU replacement.This was an indication that internal corrosion had progressed enough to affect valve operation and brake performance, prompting Hyundai to conduct a safety recall.Hyundai's repair procedures for 13V-489 require brake system flushing and replacement in all recalled vehicles with a new fluid containing the necessary corrosion inhibitor.In addition, for vehicles produced prior to June 1, 2010, dealers will perform an inspection procedure to verify that the HECU is functioning properly and replace units that do not meet the test requirements.Hyundai indicated that, based on analysis of claim data, only vehicles produced prior to June 1, 2010 have been in service long enough to require the additional inspection/replacement of the HECU. Analysis of failure data reported to NHTSA and provided by Hyundai in response to ODI's information request letter for PE13-033 identified 756 complaints and 1,683 warranty claims for 30,114 subject vehicles produced prior to June 1, 2010, resulting in a complaint rate of 25.1 incidents per thousand vehicles (IPTV) and a claim rate of 5.6 percent.The MY 2009 vehicles, with the longest exposure times, experienced the highest complaint (33.5 IPTV) and warranty (7.0 percent) rates.For the 45,639 subject vehicles produced after June 1, 2010, ODI identified 13 complaints and 34 warranty claims, resulting in a complaint rate of 0.3 IPTV and a warranty claim rate of 0.1 percent, indicating that the brake fluid corrosion concern had not progressed far enough to result in significant rates of brake system performance symptoms in those vehicles.This investigation is closed.ODI will continue to monitor complaints to evaluate the effectiveness of Hyundai's recall.The VOQs noted in the Failure Report are: 10569231, 10560898, 10560495, 10559360, 10558279, 10558264, 10556964, 10556631, 10556577, 10556322, 10554988, 10554802, 10554122, 10552958, 10551817, 10551157, 10551110, 10551092, 10550791, 10550773, 10550431, 10549750, 10549634, 10549629, 10549567, 10549402, 10549376, 10549270, 10549228, 10549186, 10549021, 10548903, 10548823, 10548791, 10548737, 10548722, 10548716, 10548705, 10546565, 10544803, 10543663, 10542962, 10541959, 10541741, 10538208, 10537934, 10536652, 105354
Service Brakes, Hydraulic
On October 28, 2013, Hyundai Motor Company (Hyundai) submitted a Defect Information Report (DIR) to NHTSA describing a safety defect in the braking system of approximately 43,500 model year (MY) 2009 through 2012 Hyundai Genesis sedans (NHTSA Recall No. 13V-489).The Hyundai report indicates that the recalled vehicles may contain brake fluid that does not sufficiently inhibit corrosion on the zinc plating of control valve armatures in the Hydraulic Electronic Control Unit (HECU) module. The DIR indicated that, over time, the build-up of corrosion products may affect operation of HECU control valves, resulting in a low/soft brake pedal with reduced brake effectiveness, which may increase the risk of a crash.In October 2011, the HECU supplier notified Hyundai that the brake fluid used in production plants was causing corrosion of valve armatures in the control module.The supplier changed the coating of the valve armatures in late March 2012 to correct the problem in production vehicles.Hyundai's recall includes Genesis vehicles produced prior to the implementation of the HECU change.In March 2013, Hyundai initiated a Service Campaign (TL6) to replace brake fluid in the subject vehicles with brake fluid with better corrosion resistance properties.According to Hyundai's DIR letter, after PE13-033 was opened, the company noted that some of the vehicles serviced in the TL6 campaign subsequently required HECU replacement.This was an indication that internal corrosion had progressed enough to affect valve operation and brake performance, prompting Hyundai to conduct a safety recall.Hyundai's repair procedures for 13V-489 require brake system flushing and replacement in all recalled vehicles with a new fluid containing the necessary corrosion inhibitor.In addition, for vehicles produced prior to June 1, 2010, dealers will perform an inspection procedure to verify that the HECU is functioning properly and replace units that do not meet the test requirements.Hyundai indicated that, based on analysis of claim data, only vehicles produced prior to June 1, 2010 have been in service long enough to require the additional inspection/replacement of the HECU. Analysis of failure data reported to NHTSA and provided by Hyundai in response to ODI's information request letter for PE13-033 identified 756 complaints and 1,683 warranty claims for 30,114 subject vehicles produced prior to June 1, 2010, resulting in a complaint rate of 25.1 incidents per thousand vehicles (IPTV) and a claim rate of 5.6 percent.The MY 2009 vehicles, with the longest exposure times, experienced the highest complaint (33.5 IPTV) and warranty (7.0 percent) rates.For the 45,639 subject vehicles produced after June 1, 2010, ODI identified 13 complaints and 34 warranty claims, resulting in a complaint rate of 0.3 IPTV and a warranty claim rate of 0.1 percent, indicating that the brake fluid corrosion concern had not progressed far enough to result in significant rates of brake system performance symptoms in those vehicles.This investigation is closed.ODI will continue to monitor complaints to evaluate the effectiveness of Hyundai's recall.The VOQs noted in the Failure Report are: 10569231, 10560898, 10560495, 10559360, 10558279, 10558264, 10556964, 10556631, 10556577, 10556322, 10554988, 10554802, 10554122, 10552958, 10551817, 10551157, 10551110, 10551092, 10550791, 10550773, 10550431, 10549750, 10549634, 10549629, 10549567, 10549402, 10549376, 10549270, 10549228, 10549186, 10549021, 10548903, 10548823, 10548791, 10548737, 10548722, 10548716, 10548705, 10546565, 10544803, 10543663, 10542962, 10541959, 10541741, 10538208, 10537934, 10536652, 105354