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2021 Toyota Highlander: engine and transmission complaints

HIGH COMPLAINT SIGNAL
59%
272 of 459 relevant owner complaints are about the engine, transmission or fuel system

59% of relevant owner complaints filed with NHTSA on the 2021 Toyota Highlander are about the engine, transmission or fuel system. That is a model-level pattern, not bad luck.

Worse than 79% of the 1,230 model years we track (2010–2023).

Excludes 49 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 54%).

NHTSA data checked September 13, 2026
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Drivetrain complaints
272
engine, transmission, fuel
Total complaints
508
this model year
Fires reported
4
owner-reported
Recall campaigns
4
16 crashes · 18 injuries

Complaints by component

POWER TRAIN215 · 42%
SERVICE BRAKES66 · 13%
UNKNOWN OR OTHER62 · 12%
STRUCTURE51 · 10%
ENGINE44 · 9%
AIR BAGS42 · 8%

The years either side

2010
13%
27 of 238
2011
19%
32 of 186
2012
15%
27 of 191
2013
25%
47 of 211
2014
8%
11 of 137
2015
13%
22 of 190
2016
15%
14 of 109
2017
54%
134 of 265
2018
45%
109 of 264
2019
68%
308 of 478
2020
56%
155 of 311
2021
59%
272 of 508
2022
30%
63 of 239
2023
28%
45 of 177

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 midsize SUVs 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

STEERING,POWER TRAIN,SERVICE BRAKES11/10/2025CRASH3 INJURED
Vehicle had a very loud high pitch whining noise the rapid accelerated I was braking and brakes were not working vehicle screen was flashing Vehicle Malfunction. yes vehicle is available. I could not stop the vehicle I struck three signs and a lady fell down as i was approaching the the building very fast, hit a wrou…
VEHICLE SPEED CONTROL,SERVICE BRAKES,ENGINE01/04/20242 INJURED
Varias veces mientras conduzco en la ruta la velocidad permitida, el carro frena, pierde potencia el motor, el sistema de aceleración no responde, esas veces me salve de accidentes mortales junto a mi familia, reclame a toyota corporación indicar eso y para ellos no paso nada nunca tomaron en serio, mientras que el car…
POWER TRAIN09/10/2026
Leadcar Toyota LaCrosse WI has diagnosed and reported that the transmission needs to be replaced. Pertains to Service Bulletin T-SB-0008-21 the pinion shaft bearing defect. The major powertrain component is failing prematurely. Cost to repair is over $9,000 as it is out of warranty. We purchased the vehicle at 67,5…

Three of 272 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 (4)

STRUCTURE:BODY:BUMPERS
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2020-2023 Highlander & Highlander Hybrid vehicles. During normal vehicle operation, minor impact t…
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…
TIRES
Southeast Toyota Distributors, LLC (SET) is recalling certain 2021-2024 Highlander vehicles. The 20-inch accessory tires with an insufficient load rating for the vehicle…

This does not say whether a particular car has an open, unrepaired recall. That depends on the VIN.

Before you buy a 2021 Toyota Highlander

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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.