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2013 Toyota Prius

Owner reports · Recalls · Investigations

More warning signs than most Prius years

Owner complaints for the 2013 Toyota Prius are substantially higher than the model-year median of 164.

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When problems were reported

Mileage at the reported incident

174 reports with mileage · 235 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 229 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 51 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine. Review the 37 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

39 crash reports3 fire reports19 injury reports

Engine complaints

37 reports
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Mileage unknown · Sep 15, 2020
EngineUnknown Or Other

EXCESSIVE OIL BURNING.

NHTSA ODI #11355060

84,000 miles · Mar 5, 2020
Engine

WE HARE RECENTLY STARTED EXPERIENCING EXCESSIVE OIL CONSUMPTION WITHOUT DASH WARNING. OUR CAR BURNED 2 QUARTS OF OIL IN 150 MILES WITH NO WARNING. TOYOTA HAS ISSUED AN INTERNAL SERVICE BULLETIN (T-SB-0169-16) THAT COVERS OUR VIN NUMBER, BUT SINCE WE ARE BEYOND WARRANTY THEY MADE NO OFFER TO HELP (WE WERE NOT NOTIFIED WHILE THE V…

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WE HARE RECENTLY STARTED EXPERIENCING EXCESSIVE OIL CONSUMPTION WITHOUT DASH WARNING. OUR CAR BURNED 2 QUARTS OF OIL IN 150 MILES WITH NO WARNING. TOYOTA HAS ISSUED AN INTERNAL SERVICE BULLETIN (T-SB-0169-16) THAT COVERS OUR VIN NUMBER, BUT SINCE WE ARE BEYOND WARRANTY THEY MADE NO OFFER TO HELP (WE WERE NOT NOTIFIED WHILE THE VEHICLE WAS UNDER WARRANTY). ESSENTIALLY OUR CAR WAS IN MOTION AT HIGHWAY SPEEDS WITH LITTLE OR NO OIL, BUT NO WARNING THAT THERE WAS NO OIL. I THINK WE GOT VERY LUCKY THAT OUR DRIVE ENDED BEFORE THE ENGINE FAILED.

NHTSA ODI #11316467

21,000 miles · Jan 2, 2020
Electronic Stability Control (esc)EngineService Brakes

ATTEMPTING TO TRAVEL IN MY 2013 PRIUS FIVE DURING XMAS WAS DRIVING AND APPROACHING A RED AND WHILE TRYING TO STOP PEDAL WENT DIRECTLY TO FLOOR AND SKID LIGHT WENT ON AND BARELY AVOIDED WHAT SHOULD BE AN EASY STOP!! WEATHER CLEAR FELT A DRAG AND NO COASTING ABILITY... CAR HAS 21,000 MILES AND IS IN PERFECT APPEARANCE BUT FAR FROM…

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ATTEMPTING TO TRAVEL IN MY 2013 PRIUS FIVE DURING XMAS WAS DRIVING AND APPROACHING A RED AND WHILE TRYING TO STOP PEDAL WENT DIRECTLY TO FLOOR AND SKID LIGHT WENT ON AND BARELY AVOIDED WHAT SHOULD BE AN EASY STOP!! WEATHER CLEAR FELT A DRAG AND NO COASTING ABILITY... CAR HAS 21,000 MILES AND IS IN PERFECT APPEARANCE BUT FAR FROM IN PEAK CONDITION AS THIS CAR FROM BRAND NEW HAD ISSUES I GOT TIRED WAITING FOR TOYOTA TO FIX. CRUISE CONTROL, BRAKES, BLUETOOTH, ENGINE WRAPPING SOUNDS ON STARTUP, I AM TOLD THE BRAKE ISSUE SINCE NEW IS NOW A 3,000+ REPAIR AND SINCE IT SHOWED NO CODE AT DEALER I WOULD HAVE TO PAY! MERRY XMAS TOYOTA! WHAT IS NHTSA WAITING FOR??? I AM SHOCKED AT BOTH FOR INACTION SO I WILL MAKE SOME CALL TO MY ELECTED OFFICIALS THIS HAS TO BE FIXED. TOYOTA IS BECOMING GM WHO WOULD HAVE FIGURED?? MY OTHER PRIUS ISSUES MATTER LESS WHEN BRAKES DON'T STOP YOU REASONABLY AND THE REPAIR IS OVER 3,000 ON A CAR WITH 21,000 WELL CARED FOR MILES...

NHTSA ODI #11296756

21,000 miles · Dec 24, 2019
EngineService BrakesUnknown Or Other

FROM DAY #1 THESE ISSUES WERE PRESENT ON 2013 PRIUS FIVE: LKA SUDDENLY STOPS CAR OVER MINOR CAR MOVEMENTS AHEAD,MAJOR KNOCKING SOUNDS FROM ENGINE ON COLD STARTS, BRAKE PEDAL HITS FLOOR AND SUDDENLY LOCKS UP! I NOW HAVE 20K AND HARDLY DRIVE IT NOW TRIPS SKID ICON?, BLUETOOTH IS ERRATIC, CRUISE CONTROL SHUTS OFF OR WON'T TURN ON W…

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FROM DAY #1 THESE ISSUES WERE PRESENT ON 2013 PRIUS FIVE: LKA SUDDENLY STOPS CAR OVER MINOR CAR MOVEMENTS AHEAD,MAJOR KNOCKING SOUNDS FROM ENGINE ON COLD STARTS, BRAKE PEDAL HITS FLOOR AND SUDDENLY LOCKS UP! I NOW HAVE 20K AND HARDLY DRIVE IT NOW TRIPS SKID ICON?, BLUETOOTH IS ERRATIC, CRUISE CONTROL SHUTS OFF OR WON'T TURN ON WHEN ITS WET OUT, DRIZZLES OR RAINS! IS MY TOYOTA MY MOTHER WARNING ME NOT TO DRIVE IN BUMPER TO BUMPER TRAFFIC, AVOID RAIN OR SNOW, NOT TO USE ELECTRONICS OR LISTEN TO MUSIC WHILE DRIVING AND IF I USE THE TECH IN THIS 36K PRIUS FIVE ITS CAUSING ME TO DRIVE LIKE A 90 YR OLD WITH BAD EYES AND EVEN POORER JUDGEMENT! IT'S A WONDER WHY SOME PEOPLE HATE PRIUS DRIVERS..! THE 12V BATTERY DIES EVERY FEW DAYS SO I MUST KEEP IT PLUGGED IN. I EVEN WRAP MY FOB IN FOIL AT HOME AND KEEP IT AS FAR FROM CAR AS POSSIBLE TO NOT WAKE UP THE CAR IF I WALK BY A WINDOW CLOSE TO ITS PARKED TO AVOID POWER DRAIN. TOYOTA TELLS DEALER EVERYTHING IS OKAY? ....IN WHAT WORLD WOULD ANYONE PAY TO HAVE A CAR LIKE THIS AND TELL CUSTOMERS ITS OKAY?? I HAVE TO DRIVE AND OTHER PEOPLE'S LIVES ARE IN DANGER! MY SON IS NOW GETTING READY TO DRIVE AND I CAN'T IMAGINE HIM FIGHTING THE CONTROLS THAT TOYOTA BUILT IN TO KEEP HIM SAFE! I USED TO MANAGE A PORSCHE DEALERSHIP AND RACED ON MANY TRACKS AND CAN DRIVE FAIRLY WELL AND DON'T LIKE TO COMPLAIN BUT AFTER MY RECENT ISSUE AND RESEARCH FOUND A LOT OF COMMON PROBLEMS WITH OTHERS SO I CHIMED IN..

NHTSA ODI #11291087

164,000 miles · Nov 22, 2019
Engine

IN THE MIDDLE OF DRIVING MY CAR ON NOV 18 & NOV 21ST, THE ENGINE REVS EXTREMELY LOUD FOLLOWED BY THE INABILITY TO ACTUALLY DRIVE MY CAR, LIKE ITS SHUTTING DOWN ON ME. IN A MATTER OF ABOUT 5 SECONDS AND IT NOT ALLOWING ME TO DRIVE OR ACCELERATE IT RETURNS TO NORMAL. IT HAS HAPPENED TWICE THIS WEEK AND THOUGHT FOR SURE I WOULD F…

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IN THE MIDDLE OF DRIVING MY CAR ON NOV 18 & NOV 21ST, THE ENGINE REVS EXTREMELY LOUD FOLLOWED BY THE INABILITY TO ACTUALLY DRIVE MY CAR, LIKE ITS SHUTTING DOWN ON ME. IN A MATTER OF ABOUT 5 SECONDS AND IT NOT ALLOWING ME TO DRIVE OR ACCELERATE IT RETURNS TO NORMAL. IT HAS HAPPENED TWICE THIS WEEK AND THOUGHT FOR SURE I WOULD FIND A RECALL ON THIS EXTREMELY DANGEROUS ISSUE BUT TO NO AVAIL. IT HAPPENED BOTH TIMES ON A WELL TRAVELED TWO-LANE HIGHWAY. I WAS DRIVING ABOUT 35-40MPH. I WAS FORTUNATE ENOUGH NO ONE WAS DIRECTLY BEHIND ME BOTH TIMES. INCREDIBLY DANGEROUS! TOYOTA PLEASE DO A RECALL ASAP!

NHTSA ODI #11281689

77,000 miles · Oct 28, 2019
EngineSteering

TOYOTA DEALERSHIP REFUSED ON RECALL BASED ON DEFECTED STEERING SHAFT WHICH WAS BOUGHT BY ME AND FIXED BY MECHANIC. IT WAS CRITICAL ISSUE AND RECALL IN OTHER MODELS AS WELL. ALSO, TOYOTA DOES NOT FIX DEFECTIVE PISTON RINGS BASED ON EXCESSIVE OIL CONSUMPTION -HTTPS://ATTACHMENTS.PRIUSCHAT.COM/ATTACHMENT-FILES/2019/04/165269_T-SB-0…

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TOYOTA DEALERSHIP REFUSED ON RECALL BASED ON DEFECTED STEERING SHAFT WHICH WAS BOUGHT BY ME AND FIXED BY MECHANIC. IT WAS CRITICAL ISSUE AND RECALL IN OTHER MODELS AS WELL. ALSO, TOYOTA DOES NOT FIX DEFECTIVE PISTON RINGS BASED ON EXCESSIVE OIL CONSUMPTION -HTTPS://ATTACHMENTS.PRIUSCHAT.COM/ATTACHMENT-FILES/2019/04/165269_T-SB-0169-16.PDF. PLEASE HELP ME AT LEAST RECOVER SOME MONEY FOR THE PART AND FINALLY LET THEM BE RESPONSIBLE FOR BURNED OIL IN ENGINE!

NHTSA ODI #11271498

75,000 miles · Oct 8, 2019
EngineSuspensionUnknown Or Other

UNKNOWN SQUEAKING AT THE BACK, NONE OF THE MECHANICS WAS ABLE IDENTIFY THE SOUND ON THE BACK SEAT ... OIL BURNING, BULBS BURNING SO OFTEN.

NHTSA ODI #11266942

152,000 miles · Sep 30, 2019
Engine

BASED ON THE DESCRIPTION FROM THE DEALER, THE PISTON ROD BROKE AND HIT THE CASING AND BROKE THE CASING CAUSING CATASTROPHIC FAILURE, THIS HAPPENED WHEN I WAS DRIVING THE CAR AND WAS AT 40 MPH. AS I WAS DRIVING, I HEARD A LOUD BANG AND SUDDENLY MY CAR STARTED SHAKING VIOLENTLY AND THEN SMOKE STARTED COMING OUT FROM THE ENGINE A…

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BASED ON THE DESCRIPTION FROM THE DEALER, THE PISTON ROD BROKE AND HIT THE CASING AND BROKE THE CASING CAUSING CATASTROPHIC FAILURE, THIS HAPPENED WHEN I WAS DRIVING THE CAR AND WAS AT 40 MPH. AS I WAS DRIVING, I HEARD A LOUD BANG AND SUDDENLY MY CAR STARTED SHAKING VIOLENTLY AND THEN SMOKE STARTED COMING OUT FROM THE ENGINE AREA. I IMMEDIATELY STOPPED THE CAR AND GOT IT TOWED TO THE NEAREST SHOP FOR INSPECTION WHEN THEY FOUND THIS ISSUE WHICH IF I WAS ON A HIGHWAY COULD HAVE BEEN DISASTROUS. AND COULD HAVE GOT INTO AN UNFORTUNATE ACCIDENT. WHICH COULD HAVE BEEN FATAL..

NHTSA ODI #11265258

250,000 miles · Jul 2, 2019
Electrical SystemEngine

HYBRID SYSTEM SHUTS DOWN WHILE DRIVING WITHOUT WARNING AND HAPPENS EVERY DAY

NHTSA ODI #11229078

89,000 miles · Feb 6, 2019
Engine

ENGINE RATTLE/KNOCKING NOISE ON FIRST MORNING START UP ON OCCASION. CAR IS PARKED OUTSIDE IN A DRIVEWAY IN LOS ANGELES, CALIFORNIA. PREVIOUS DATES UNKNOWN (MAYBE HAPPENED 4 OTHER TIMES). LOG STARTED 11/26/18 SINCE THE NOISE WAS REALLY BAD THAT DAY. 11/26/18 AT 6 A.M. CAR SAT IN DRIVEWAY FOR 2 DAYS. THE NOISE WAS REALLY BAD,…

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ENGINE RATTLE/KNOCKING NOISE ON FIRST MORNING START UP ON OCCASION. CAR IS PARKED OUTSIDE IN A DRIVEWAY IN LOS ANGELES, CALIFORNIA. PREVIOUS DATES UNKNOWN (MAYBE HAPPENED 4 OTHER TIMES). LOG STARTED 11/26/18 SINCE THE NOISE WAS REALLY BAD THAT DAY. 11/26/18 AT 6 A.M. CAR SAT IN DRIVEWAY FOR 2 DAYS. THE NOISE WAS REALLY BAD, THE CHECK ENGINE LIGHT CAME ON. THE NEXT DAY THE CHECK ENGINE LIGHT AUTOMATICALLY CAME OFF. 1/22/19 AT 6 A.M. CAR SAT IN DRIVEWAY FOR 2 DAYS. THE NOISE WAS BAD BUT NOT AS BAD AS 11/26/18. CHECK ENGINE LIGHT DID NOT COME ON. 2/1/19 AT 6 A.M. CAR SAT IN DRIVEWAY OVERNIGHT. SLIGHT NOISE. CHECK ENGINE LIGHT DID NOT COME ON. I HAVE SEEN SEVERAL OTHER COMPLAINTS ONLINE. SOME HAVE SAID ITS THE INTAKE MANIFOLD. THE DEALER HAS REQUESTED I TAKE MY CAR IN FOR THE RECALL (RECALL NO. 18V684) TO SEE IF IT FIXES THE PROBLEM BUT I'M GOING TO REQUEST THEY DIG INTO THIS FURTHER. I HAVE APPROXIMATELY 92,000 MILES.

NHTSA ODI #11174763

Official recalls

3

20V369000 · Hybrid Propulsion System: Inverter

Jun 24, 2020

Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2013-2015 Prius and 2014-2017 Prius V vehicles not included in recall 18V-684. Excessive voltage in the Intelligent Power Module (IPM) within the inverter may cause the hybrid system to shut down, causing the vehicle to stall while being driven.

Consequence & remedy

Consequence: An unexpected hybrid power system shut down may increase the risk of a crash.

Remedy: Toyota will notify owners, and dealers will perform a software update for the hybrid system. If the vehicle has experienced an inverter failure with certain hybrid system faults related to this condition, the inverter assembly will be repaired or replaced, prior to software update. All repairs will be performed free of charge. This recall began July 24, 2020. Owners may contact Toyota customer service at 1-888-270-9371. Toyota's number for this recall is 20TB10 / 20TA10.

18V684000 · Hybrid Propulsion System

Oct 4, 2018

Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2010-2014 Toyota Prius and 2012-2014 Toyota Prius V vehicles. Excessive voltage in the Intelligent Power Module (IPM) within the inverter may cause the hybrid system to shut down, causing the vehicle to stall while being driven.

Consequence & remedy

Consequence: If the hybrid system shuts down unexpectedly, it can increase the risk of a crash.

Remedy: Toyota will notify owners, and dealers will update the software for the motor/generator control electronic control unit (ECU) and the hybrid control ECU as necessary, free of charge. The recall began January 22, 2019. Owners may contact Toyota customer service at 1-888-270-9371. Toyota's number for this recall is J0V. Note: The software updates in this recall are needed even if the vehicle had the software previously updated under recalls 14V-053 or 15V-449.

14V053000 · Electrical System:software; Hybrid Propulsion System: Inverter

Feb 12, 2014

Toyota is recalling certain model year 2010 through 2014 Prius vehicles. In the affected vehicles, the Intelligent Power Module (IPM) inside the inverter module (a component of the hybrid system) contains transistors that may become damaged from high operating temperatures. If this occurs, various warning lamps will be illuminated on the instrument panel and the vehicle will have reduced power allowing it to only drive a short distance.

Consequence & remedy

Consequence: The vehicle may enter a fail-safe/limp-home mode that limits the drivability of the vehicle. The hybrid system could also shut down completely resulting in a vehicle stall, increasing the risk of a crash.

Remedy: Toyota will notify owners and dealers will update the software for both the motor/generator control electronic control unit (ECU) and the hybrid control ECU, free of charge. If an owner experiences a failure of the inverter before the vehicle receives updated software, the dealer will repair or replace the inverter assembly with a new one at no charge. The recall began on March 21, 2014. Owners may contact Toyota at 1-800-331-4331.

Additional source detail variants (2)

Hybrid Propulsion System: Inverter

Toyota is recalling certain model year 2010 through 2014 Prius vehicles. In the affected vehicles, the Intelligent Power Module (IPM) inside the inverter module (a component of the hybrid system) contains transistors that may become damaged from high operating temperatures. If this occurs, various warning lamps will be illuminated on the instrument panel and the vehicle will have reduced power allowing it to only drive a short distance.

Consequence: The vehicle may enter a fail-safe/limp-home mode that limits the drivability of the vehicle. The hybrid system could also shut down completely resulting in a vehicle stall, increasing the risk of a crash.

Remedy: Toyota will notify owners and dealers will update the software for both the motor/generator control electronic control unit (ECU) and the hybrid control ECU, free of charge. If an owner experiences a failure of the inverter before the vehicle receives updated software, the dealer will repair or replace the inverter assembly with a new one at no charge. The recall began on March 21, 2014. Owners may contact Toyota at 1-800-331-4331.

Electrical System:software

Toyota is recalling certain model year 2010 through 2014 Prius vehicles. In the affected vehicles, the Intelligent Power Module (IPM) inside the inverter module (a component of the hybrid system) contains transistors that may become damaged from high operating temperatures. If this occurs, various warning lamps will be illuminated on the instrument panel and the vehicle will have reduced power allowing it to only drive a short distance.

Consequence: The vehicle may enter a fail-safe/limp-home mode that limits the drivability of the vehicle. The hybrid system could also shut down completely resulting in a vehicle stall, increasing the risk of a crash.

Remedy: Toyota will notify owners and dealers will update the software for both the motor/generator control electronic control unit (ECU) and the hybrid control ECU, free of charge. If an owner experiences a failure of the inverter before the vehicle receives updated software, the dealer will repair or replace the inverter assembly with a new one at no charge. The recall began on March 21, 2014. Owners may contact Toyota at 1-800-331-4331.

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

3

DP23005 · Brake Actuator Valve Wear

Opened Nov 22, 2023 · No close date supplied

Status: open (inferred from source dates) · Service Brakes, Hydraulic:foundation Components; Service Brakes, Hydraulic:power Assist

The Office of Defects Investigation (ODI) has received a petition dated September 19, 2023 from the owner of a 2012 Toyota Prius V requesting that ODI reevaluate its decision to deny DP19-004. In the letter, the petitioner reported experiencing an unexpected and complete loss of brake power while driving, accompanied by multiple dashboard warning lights. This petition is based on the petitioner's direct experience and assessment that ODI closed DP19-004 because its prompting petition was withdrawn by that petitioner. ODI will review the work conducted during DP19-004 and a review of any additional related complaints and crashes via a new defect petition The petition and related materials can be reviewed at NHTSA.gov under the following ODI number:11553736.

Additional source detail variants (2)

Service Brakes, Hydraulic:foundation Components

The Office of Defects Investigation (ODI) has received a petition dated September 19, 2023 from the owner of a 2012 Toyota Prius V requesting that ODI reevaluate its decision to deny DP19-004. In the letter, the petitioner reported experiencing an unexpected and complete loss of brake power while driving, accompanied by multiple dashboard warning lights. This petition is based on the petitioner's direct experience and assessment that ODI closed DP19-004 because its prompting petition was withdrawn by that petitioner. ODI will review the work conducted during DP19-004 and a review of any additional related complaints and crashes via a new defect petition The petition and related materials can be reviewed at NHTSA.gov under the following ODI number:11553736.

Service Brakes, Hydraulic:power Assist

The Office of Defects Investigation (ODI) has received a petition dated September 19, 2023 from the owner of a 2012 Toyota Prius V requesting that ODI reevaluate its decision to deny DP19-004. In the letter, the petitioner reported experiencing an unexpected and complete loss of brake power while driving, accompanied by multiple dashboard warning lights. This petition is based on the petitioner's direct experience and assessment that ODI closed DP19-004 because its prompting petition was withdrawn by that petitioner. ODI will review the work conducted during DP19-004 and a review of any additional related complaints and crashes via a new defect petition The petition and related materials can be reviewed at NHTSA.gov under the following ODI number:11553736.

DP22005 · Pedestrian Alert Sounds

Opened Jan 27, 2023 · Closed Aug 7, 2023

Status: closed (inferred from source dates) · Electrical System:propulsion System

NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after March 1, 2021.On January 27, 2023, NHTSA opened Defect Petition (DP) 22-005 to evaluate the subject matter described in the petition. On June 24, 2023 and as supplemented on June 25, 2023, the petitioner notified NHTSA he was withdrawing his petition. The petitioner indicated that, based on his review of data, there is no justification for asserting potential benefits that could be derived from actions sought by my petition. Based on the petitioner's withdrawal, DP22-005 is closed. Closure of this DP does not represent a determination by NHTSA regarding the subject matter of the petition.

DP19004 · Brake Actuator Valve Wear

Opened Sep 30, 2019 · Closed Jan 21, 2021

Status: closed (inferred from source dates) · Service Brakes, Hydraulic:power Assist

On September 19, 2019, the Office of Defects Investigation (ODI) received a defect petition from Mr. Roger Hogan requesting that the Agency investigate and recall certain Toyota Prius, Prius PHV, Camry Hybrid and Avalon Hybrid vehicles for a brake actuator valve wear condition covered under Toyota Customer Support Programs ZJB and ZKK (subject CSP?s). In support of his request, the petitioner identified 117 NHTSA complaints allegedly related to the subject CSP condition, including 60 reporting crashes. On September 30, 2019, ODI opened Defect Petition DP19-004 to evaluate the petitioner?s request for an investigation. In August 2020, the petitioner notified the Agency that he was withdrawing his petition. Because the petitioner has withdrawn the petition, we are denying the petition as moot and no further analysis of this petition is necessary.NHTSA is authorized to issue an order requiring notification and remedy of a defect if the Agency?s investigation shows a defect in the design, construction, or performance of a motor vehicle that presents an unreasonable risk to safety. 49 U.S.C. ?? 30102(a)(9), 30118. Because the petitioner has with withdrawn the petition, the petition is denied as moot. This action does not constitute a finding by NHTSA that a safety-related defect does not exist. The Agency notes that it is not required to receive a defect petition prior to opening a defect investigation and will take further action if warranted by future circumstances.