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2020 Toyota Corolla: engine and transmission complaints

HIGH COMPLAINT SIGNAL
54%
152 of 279 relevant owner complaints are about the engine, transmission or fuel system

54% of relevant owner complaints filed with NHTSA on the 2020 Toyota Corolla are about the engine, transmission or fuel system. That is a model-level pattern, not bad luck.

Worse than 71% of the 1,230 model years we track (2010–2023).

Excludes 27 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 50%).

NHTSA data checked September 13, 2026
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Drivetrain complaints
152
engine, transmission, fuel
Total complaints
306
this model year
Fires reported
1
owner-reported
Recall campaigns
3
22 crashes · 23 injuries

Complaints by component

ENGINE108 · 35%
UNKNOWN OR OTHER79 · 26%
POWER TRAIN37 · 12%
ELECTRICAL SYSTEM31 · 10%
SERVICE BRAKES22 · 7%
AIR BAGS18 · 6%

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 2020

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 TRAIN,UNKNOWN OR OTHER,BACK OVER PREVENTIO08/27/2022CRASH3 INJURED
I am not sure what the component is but I am driving and as I accelerate the gas my car will lose power to increase speed. If I am at the stop sign or stop light and I proceed to go the car will stall and not get going once I place my foot on the gas. I have reached out to the dealer by phone and when I have obtained…
ENGINE,FUEL/PROPULSION SYSTEM08/11/20212 INJURED
We rented a 2020 Toyota Corolla from Hertz at the McCarran Airport Las Vegas NV and almost past out while driving due to Carbon Monoxide poisonings. My wife was sick 3 out of the 4 days while this auto was being driven in our possession. At first our sickness was thought to be motion sickness or maybe from something …
ENGINE08/06/2026
Part is the coolant bypass valve. Toyota has been taken to court but dealership claims now that I’m over 100k miles I can’t do it. There was also a second part about 10 years but I wasn’t clear on the details of the outcome. Toyota has acknowledged this issue in court but failed to do so at the customer level in my c…

Three of 152 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 (3)

FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2018-2019 4Runner, 2019-2020 Avalon, 2019 Corolla Hatchback, 2017-2019 Highlander, 2018-2020 Camry,…
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…
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 2020 Toyota Corolla

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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.