IllustrationThe car will need a new coolant by-pass valve ($663 installed). This is a problem that seems to be affecting more cars than usual as it is in many websites and social media portals, but it's not recognized to be recalled!! A $70.00usd part for $663.00 installed??
2020 Toyota Corolla
Owner reports · Recalls · Investigations
More warning signs than most Corolla years
Owner complaints for the 2020 Toyota Corolla are substantially higher than the model-year median of 129.
About this comparison →How this year compares
Owner complaints by model year
Compare all Corolla 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
Limited mileage data: 68 of 305 reports include usable mileage. There isn’t enough coverage to show a useful chart.
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.
- Engine. Review the 108 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Power Train. Review the 38 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Electrical System. Review the 30 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
22 crash reports1 fire reports15 injury reports
What owners actually said
305 reportsI had called Toyota colonial dealership in Milford CT. After briefly speaking with the service representative, he advised that it’s most likely the engine coolant bypass valve. He said that it is common with my car models. I did some extra research and found out that many others were having the same issue from only having the ca…
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I had called Toyota colonial dealership in Milford CT. After briefly speaking with the service representative, he advised that it’s most likely the engine coolant bypass valve. He said that it is common with my car models. I did some extra research and found out that many others were having the same issue from only having the car for a few years.
2020 TOYOTA COOLANT BYPASS VALVE. $800 estimate to repair
The coolant bypass valve on my 2020 Corolla SE has started to go bad. The repairs are over $700. Apparently, this is a well known and documented issue with not just the Corolla but also the RAV-4 models. No recalls have been issues despite this being a known problem.
The coolant valve in the engine began malfunctioning and leaking next the the battery. I took it to the dealership and they said that this was a common maintenance issue, but it is do to the part being faulty overall. This is a widespread issue with this make and model of the vehicle and the part has not been recalled. Leakage c…
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The coolant valve in the engine began malfunctioning and leaking next the the battery. I took it to the dealership and they said that this was a common maintenance issue, but it is do to the part being faulty overall. This is a widespread issue with this make and model of the vehicle and the part has not been recalled. Leakage could possibly cause the engine to overheat and the result could be catastrophic.
Coolant bypass valve malfunction, leaking coolant, engine maintenance required sign pops up on dash around 60k miles
Engine maintenance light came on after turning on air conditioner. Vehicle information: warning light came on at 56,800 miles on 2020 Toyota Corolla, no after market modifications to vehicle. I took vehicle to Toyota dealership for diagnostic testing. Conclusion: coolant bypass valve faulty causing leaks (this can cause overheat…
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Engine maintenance light came on after turning on air conditioner. Vehicle information: warning light came on at 56,800 miles on 2020 Toyota Corolla, no after market modifications to vehicle. I took vehicle to Toyota dealership for diagnostic testing. Conclusion: coolant bypass valve faulty causing leaks (this can cause overheating, stalling, increased emissions, and total engine failure and also allows coolant to leak into and damage surrounding engine components, including a vehicle's electrical system, the complaint relays). Fortunately, I PURCHASED AN EXTENDED WARRANTY when I bought the vehicle new, which covered the repairs. The faulty coolant bypass valve was replaced at the Toyota dealership. Had I not purchased the extended warranty, I would of been out of pocket for said repairs.
My car is at around 42,000 miles and has had an engine maintenance light on. I take it in and it’s a defective coolant bypass valve issue. The dealership tried to charge me 800 dollars to replace it. It’s an apparent fault on their part since it has been an apparent problem with other toyota corollas with a lawsuit already filed…
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My car is at around 42,000 miles and has had an engine maintenance light on. I take it in and it’s a defective coolant bypass valve issue. The dealership tried to charge me 800 dollars to replace it. It’s an apparent fault on their part since it has been an apparent problem with other toyota corollas with a lawsuit already filed.
THE CAR IS 41.000 MILES. WATER PUMP HAD TO BE REPLACED WHEN SUPPOSEDLY MUST TO LAST UNTIL 100.000 MILES.
coolant bypass valve issue
Official recalls
323V865000 · Air Bags:sensor:occupant Classification
Dec 20, 2023
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2020-2021 Avalon, Avalon Hybrid, Corolla, Highlander, Highlander Hybrid, RAV4, RAV4 Hybrid, Lexus ES350, Lexus RX350, Lexus RX450H, 2021 Sienna Hybrid, Lexus ES250, 2020-2022 Camry, Camry Hybrid, and ES300H vehicles. A short circuit may develop in the Occupant Classification System (OCS) sensor, preventing the front passenger air bag from deploying.
Consequence & remedy
Consequence: An air bag that does not deploy during a crash increases the risk of injury.
Remedy: Dealers will inspect and replace the sensor as necessary, free of charge. Interim letters notifying owners of the safety risk were mailed in February 2024. Some final remedy owner letters were mailed October 31, 2024. Letters will continue to be mailed in phases through January 2026. Owners may contact Toyota customer service at 1-800-331-4331. Toyota's number for this recall is 23TB15/23TA15 Lexus 23LB03/23LA03.
20V682000 · Fuel System, Gasoline:delivery:fuel Pump
Nov 4, 2020
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2018-2019 4Runner, 2019-2020 Avalon, 2019 Corolla Hatchback, 2017-2019 Highlander, 2018-2020 Camry, 2020 Corolla, 2018-2019 Land Cruiser, 2017-2020 Tacoma, 2019-2020 RAV4, 2019-2020 Sequoia, 2017-2020 Sienna, 2019-2020 Tundra, 2018-2020 Lexus ES350, 2017 Lexus GS200t, 2017-2019 Lexus GS350, 2019 Lexus GS300, 2018-2020 Lexus LC500h, 2019-2020 Lexus LS500, 2018-2019 Lexus GX460, 2017 Lexus IS200t, 2019 Lexus IS300, 2019 Lexus IS350, 2018-2020 Lexus LC500, 2018 Lexus LS500, 2019 Lexus LS500h, 2018-2019 Lexus LX570, 2017 Lexus RC200t, 2019 Lexus RC300, RC350, 2017 and 2019-2020 Lexus RX350, 2018-2020 RX350L, 2019 Lexus UX200, 2018-2019 Lexus NX300 vehicles. The low-pressure fuel pump inside the fuel tank may fail.
Consequence & remedy
Consequence: If the fuel pump fails, the engine can stall while driving, increasing the risk of a crash.
Remedy: Toyota will notify owners, and dealers will replace the fuel pump assembly with an improved one, free of charge. Owners of specific models were notified that remedy parts were available starting January 21, 2021. Owners of other models will be notified as remedy parts become available. Remedy parts should be available for all affected vehicles by late March 2021. Owners may contact Toyota customer service at 1-888-270-9371 or Lexus customer service at 1-800-255-3987. Note: This recall is an expansion of recall 20V-012. Toyota's number for this recall is 20TA02. Lexus' number for this recall is 20LA01.
19V877000 · Seat Belts: Rear/other:buckle Assembly; Seat Belts:rear/other
Dec 11, 2019
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2019-2020 C-HR and 2020 Corolla and Corolla Hybrid vehicles equipped with rear seat belt assemblies with a dual-mode locking mechanism. The seat belt webbing sensor locking mechanism may not lock as intended.
Consequence & remedy
Consequence: In the event of a crash involving multiple impacts, the seat belt may not properly restrain the occupant, increasing the risk of injury.
Remedy: Toyota will notify owners, and dealers will inspect the rear seat belt assembly production dates, and replace the assemblies, as necessary, free of charge. The recall began February 7, 2020. Owners may contact Toyota customer service at 1-888-270-9371. Toyota's numbers for this recall are 19TB22 and 19TA22.
Additional source detail variants (2)
Seat Belts: Rear/other:buckle Assembly
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2019-2020 C-HR and 2020 Corolla and Corolla Hybrid vehicles equipped with rear seat belt assemblies with a dual-mode locking mechanism. The seat belt webbing sensor locking mechanism may not lock as intended.
Consequence: In the event of a crash involving multiple impacts, the seat belt may not properly restrain the occupant, increasing the risk of injury.
Remedy: Toyota will notify owners, and dealers will inspect the rear seat belt assembly production dates, and replace the assemblies, as necessary, free of charge. The recall began February 7, 2020. Owners may contact Toyota customer service at 1-888-270-9371. Toyota's numbers for this recall are 19TB22 and 19TA22.
Seat Belts:rear/other
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2019-2020 C-HR and 2020 Corolla and Corolla Hybrid vehicles equipped with rear seat belt assemblies with a dual-mode locking mechanism. The seat belt webbing sensor locking mechanism may not lock as intended.
Consequence: In the event of a crash involving multiple impacts, the seat belt may not properly restrain the occupant, increasing the risk of injury.
Remedy: Toyota will notify owners, and dealers will inspect the rear seat belt assembly production dates, and replace the assemblies, as necessary, free of charge. The recall began February 7, 2020. Owners may contact Toyota customer service at 1-888-270-9371. Toyota's numbers for this recall are 19TB22 and 19TA22.
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
0No exact-year investigations in this snapshot.