The Lane Check

CarsToyota › Corolla › 2021

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%).

NHTSA data checked September 13, 2026
Share this car

Looking at a specific Corolla?Check its VIN: the full report, quotes about its own engine, and whether its recalls are still open. First report free.

Check a VIN
Drivetrain complaints
59
engine, transmission, fuel
Total complaints
185
this model year
Fires reported
2
owner-reported
Recall campaigns
1
18 crashes · 13 injuries

Complaints by component

AIR BAGS52 · 28%
ENGINE40 · 22%
UNKNOWN OR OTHER32 · 17%
ELECTRICAL SYSTEM22 · 12%
POWER TRAIN19 · 10%
VISIBILITY/WIPER15 · 8%

The years either side

2010
11%
95 of 1,264
2011
29%
47 of 590
2012
15%
11 of 445
2013
24%
31 of 202
2014
26%
50 of 269
2015
34%
51 of 219
2016
30%
39 of 213
2017
27%
34 of 189
2018
44%
47 of 141
2019
64%
108 of 202
2020
54%
152 of 306
2021
49%
59 of 185
2022
43%
52 of 147
2023
61%
127 of 247

Manufacturers fix things mid-generation. A bad year next to a clean one is common; the fix usually arrived in between.

Cleaner alternatives

Same car, a better year

Other compact cars with no elevated signal in 2021

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

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.

Check a VIN

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.