2021 Toyota Corolla: engine and transmission complaints
HIGH COMPLAINT SIGNAL
49%
59 of 121 relevant owner complaints are about the engine, transmission or fuel system
49% of relevant owner complaints filed with NHTSA on the 2021 Toyota Corolla are about the engine, transmission or fuel system. That is a model-level pattern, not bad luck.
Worse than 62% of the 1,230 model years we track (2010–2023).
Excludes 64 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 32%).
The percentage is each model year's drivetrain complaint share. No elevated signal describes the model year, not any one car; a well-kept example of a flagged model can still be the right buy, and any of these still needs an inspection.
What owners reported
POWER TRAIN12/10/20241 INJURED
The contact owns a 2021 Toyota Corolla. The contact stated that while the vehicle was parked in the driveway with the engine off and attempting to enter the vehicle to clean the interior of the vehicle, the vehicle rolled away going downward out of the driveway. Due to the failure, the vehicle tugged the contact while …
ELECTRICAL SYSTEM,ENGINE07/21/2026
This Toyota Corolla hatchback is experiencing an issue where it is constantly giving an “ENGINE MAINTENANCE REQUIRED” light and when scanned, it says “coolant bypass valve malfunction”. There is already a recall for many Toyota Corolla Sedans experiencing this issue of this bypass valve being defective, but because t…
ENGINE07/21/2026
Notification spontaneously received as Engine Maintenance Required; Visit Your Dealer. Service appointment immediately scheduled for Toyota of Plano for the following day. My service advisor recommended replacing the coolant bypass valve, which amounted to a total bill of $745. My agent informed me of CSP 24TE04, ho…
Three of 59 drivetrain complaints. The full report shows more, with quotes about the engine in the car you are looking at first.
Recall campaigns on this model year (1)
AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2020-2021 Avalon, Avalon Hybrid, Corolla, Highlander, Highlander Hybrid, RAV4, RAV4 Hybrid, Lexus E…
This does not say whether a particular car has an open, unrepaired recall. That depends on the VIN.
Before you buy a 2021 Toyota Corolla
Ask the seller whether the engine has ever been repaired or replaced, and whether the car has shown stalling, loss of power, rough idle, oil consumption or a check-engine light.
Drive it from a cold start and long enough to warm up. Many engine faults hide once the car is warm.
Get an independent pre-purchase inspection from a mechanic you choose, and tell them to focus on the engine.
1 recall campaign on this model year. Whether a specific car still has one open depends on the VIN; the report checks that.
Ask for service records. A engine already replaced under warranty is a different car from one that was not.
Have the VIN?Paste it and get the full report for that car. First report free, then a 30-day pass covers a whole car search.
Experimental model-level information. This is not a vehicle inspection, vehicle-history
report, financial advice or purchase recommendation. It describes patterns across a model year, not the condition
of any individual vehicle.