Reliability, what owners report, and what it costs to keep.
AVOIR's read: a solid ownership case with specific caveats below.
Owners have filed 508 complaints with NHTSA about the 2021 Toyota Highlander, and it carries 4 recalls. These are owner allegations rather than confirmed defects, but the pattern of what people complain about is the most useful signal a used buyer has.
| Area | Complaints | Share |
|---|---|---|
| Power train | 193 | 38% |
| Service brakes | 43 | 8% |
| Unknown or other | 38 | 7% |
| Structure | 35 | 7% |
| Air bags | 28 | 6% |
| Fuel/propulsion system | 23 | 5% |
| Engine | 14 | 3% |
| Power train | 8 | 2% |
| Tires | 8 | 2% |
| Visibility/wiper | 7 | 1% |
Verbatim from NHTSA complaint records, trimmed for length.
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 pre
NHTSA complaint: Power train
transmission has failed. Toyota states: Toyota Technical Service Bulletin T-SB-0008-21 addresses a whining or grinding noise in select 2021 Toyota vehicles equipped with UA80E orUA80F automatic transmissions caused by a
NHTSA complaint: Power train
The 8 speed automatic transmission (UA80E) in my 2021 Toyota Highlander Limited V6 FWD failed at 75,491 miles. The failure presented as a loud whining noise during acceleration between 30 and 40 mph. A Toyota dealership
NHTSA complaint: Power train
**Component/System:** Automatic Transmission — 8-speed (UA80E/UA80F), Toyota Highlander **Description of the problem:** My 2021 Toyota Highlander (approximately 116,000 miles) has developed a high-pitched whining noise
NHTSA complaint: Power train
On August 24, 2026, my vehicle was parked, turned off, and locked for more than 6 hours in a parking lot. Without warning, the vehicle experienced a spontaneous thermal event/self combustion. The fire and thermal damage
NHTSA complaint: Electrical system
At 57,000 miles the dealership says the transmission must be replaced. Toyota refused to replace it under warranty because they stated it wasn't serviced at Toyota consistently. There isnt a service for the transmission
NHTSA complaint: Power train
1. The car makes a squeaky sound when I accelerate. The faster I go the louder the noise becomes. I took the car to the Toyota dealership and was told that the transmission needs to be replaced. The car is only 5 years o
NHTSA complaint: Power train
While driving and applying the brakes to come to a complete stop at low speed (approximately 5–15 mph), the vehicle intermittently loses brake responsiveness for a brief moment during the transition from regenerative bra
NHTSA complaint: Service brakes
NHTSA lists 4 recall campaigns for the 2021 Toyota Highlander. Recalls are free to have fixed at a franchised dealer regardless of who owns the car now, but only if they were never done, so check the VIN of the specific car rather than trusting the model.
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2020-2023 Highlander & Highlander Hybrid vehicles. During normal vehicle operation, minor impact to the front lower bumper cover may result in the cover coming loose or detaching.
Risk: A detached front bumper cover can become a road hazard, increasing the risk of a crash.
Fix: Dealers will repair or replace the upper and lower front bumper covers as necessary, free of charge. Owner letters were mailed April 22, 2024. Owners may contact Toyota customer service at 1-800-331
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 cir
Risk: An air bag that does not deploy during a crash increases the risk of injury.
Fix: 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
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's Gross Axle Weight Rating (GAWR) were installed. As such, these vehicles fail to comply with the requirements of Federal Motor
Risk: Tires with an insufficient load rating can be overloaded and fail, increasing the risk of a crash.
Fix: SET will inspect and replace the tires and information placard, as necessary free of charge. Owner notification letters were mailed August 16, 2024. Owners may contact SET's customer service at 1-86
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2021-2024 Highlander and Highlander Hybrid vehicles. The second-row seat backs may fail to lock into position during seat back adjustment.
Risk: A seat back that fails to lock may not properly restrain an occupant during a crash, increasing the risk of injury.
Fix: Dealers will replace the return springs in the seat back recliner assemblies, free of charge. Owner letters were mailed September 9, 2026. This is a phased recall. Owners may contact Toyota’s customer
| Reliability | 73 | good |
|---|---|---|
| Longevity est. | 80 | excellent |
| Maintenance | 82 | excellent |
| Depreciation | 78 | good |
| Performance | 67 | good |
| Efficiency | 42 | below average |
| Safety | 93 | excellent |
Percentile ranks against other SUVs in the catalog.
What stands behind each score for this car:
Owners have filed 508 complaints with NHTSA for this model-year, and power train is the most reported area with 193 of them (38%). There are 4 recalls on record. Check any specific car against its VIN before buying.
AVOIR scores its reliability 73/100 (good) from NHTSA recall campaigns and complaint density, adjusted for how many were sold so a popular model is not penalised for having more owners.
AVOIR scores its longevity 80/100, but that figure is an estimate built from the powertrain and the brand's record, not a measurement. A 2021 car has no 200,000-mile population to observe yet, so treat it as a prior rather than evidence.
AVOIR's read: worth a look, because a solid ownership case with specific caveats below. Its overall ownership score is 75/100. Condition, mileage and service history still matter more than any score, so get a pre-purchase inspection on the specific car.
Sources: NHTSA recalls and complaints, EPA fuel economy, IIHS awards, and live market listings. A score describes a model-year, not the individual car in front of you. Get a pre-purchase inspection.