IllustrationAfter bringing my vehicle in for its oil change and tire rotation, a warning message showed up from my car saying "Engine Maintenance Required". After checking with my dealer, they said that the coolant bypass valve needed to be replaced. My car only has 33,000 miles and has had no issues whatsoever.
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 reportsAfter I had brought a my car to the dealer for its oil change and tire rotation, a warning message came from my car saying "Engine Maintenance Required". After checking with my dealer, they said that the coolant bypass valve needed to be replaced. After checking online, it seems that this is a common problem for recent Toyota ve…
Read full complaint
After I had brought a my car to the dealer for its oil change and tire rotation, a warning message came from my car saying "Engine Maintenance Required". After checking with my dealer, they said that the coolant bypass valve needed to be replaced. After checking online, it seems that this is a common problem for recent Toyota vehicles.
Coolant bypass valve leaks through wiring and damages itself.
Coolent bypass valve
Electrical issue on vehicle says that vehicles safety features are unavailable and all the light indications on the dash are lit up. It was taken to the dealership several times but the issue still hasn’t been resolved.
Coolant bypass valve bad cost $550+ to fix car is 4 years old
The contact owns a 2020 Toyota Corolla. The contact stated while the vehicle was parked, the gear shifter was shifted to drive and then reverse, but the vehicle failed to respond as needed. No warning light was illuminated. The vehicle was towed to the dealer and a diagnostic test was performed. The vehicle was diagnosed with a …
Read full complaint
The contact owns a 2020 Toyota Corolla. The contact stated while the vehicle was parked, the gear shifter was shifted to drive and then reverse, but the vehicle failed to respond as needed. No warning light was illuminated. The vehicle was towed to the dealer and a diagnostic test was performed. The vehicle was diagnosed with a locked cylinder. The dealer stated that there was recall for the failure however, the vehicle had exceeded the mileage limitation. The vehicle was repaired. The contact referenced NHTSA Campaign Number: 19V544000 (Electronic Stability Control, Service Brakes) as a possible solution to the failure however, the VIN was not included in the recall. The manufacturer was not made aware of the failure. The approximate failure mileage was 90,249.
The system belt sensor kept beeping even though I have on seat belt
There is a thing that’s happening to a lot of Corollas and I think RAV4 and some cram it’s called engine maintenance required and a lot of mechanics don’t know what that means so you have to take it to the dealership to get it fixed and it’s like a $900 fix and it’s been happening to a lot of vehicles around 35,000 miles. It’s c…
Read full complaint
There is a thing that’s happening to a lot of Corollas and I think RAV4 and some cram it’s called engine maintenance required and a lot of mechanics don’t know what that means so you have to take it to the dealership to get it fixed and it’s like a $900 fix and it’s been happening to a lot of vehicles around 35,000 miles. It’s called the coolant bypass valve. There is hundreds of YouTube videos about it and people complaining about it on forums.
The coolant bypass valve in some Toyota models has been malfunctioning recently and has become a common issue. Dealer confirmed that this was the issue per attached diagnostic report/invoice copy. Costs were >$800 to repair the issue for a <$100 part and 30 minutes of labor. The "Engine Maintenance Required" warning was visib…
Read full complaint
The coolant bypass valve in some Toyota models has been malfunctioning recently and has become a common issue. Dealer confirmed that this was the issue per attached diagnostic report/invoice copy. Costs were >$800 to repair the issue for a <$100 part and 30 minutes of labor. The "Engine Maintenance Required" warning was visible in the display. Unsure as to the short or long-term effects of this malfunctioning part, but as it's related to the cooling system of the vehicle, it may trigger other more serious issues.
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.