Most common 2021 Toyota Highlander problems
Share of the 531 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Toyota Highlander complaints by model year
Best Highlander years: 2025, 2016, 2014. Years to avoid: 2021, 2019, 2023, 2022, 2020. Compare all years →
2021 Toyota Highlander recalls (4)
Seats › Mid/rear assembly › Recliner
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2021-2025 Highlander and Highlander Hybrid vehicles. The second-row seat backs may fail to lock into position during seat back adjustment.
Remedy: 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.
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's Gross Axle Weight Rating (GAWR) were installed.
Remedy: 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 1-866-405-4226.
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 ES350, Lexus RX350, Lexus RX450H, 2021 Sienna Hybrid, Lexus ES250, 2020-2022 Camry, Camry Hybrid, and ES300H vehicles.
Remedy: 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 October 31, 2024.
Structure › Body › Bumpers
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.
Remedy: 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 1-800-331-4331.
What 2021 Toyota Highlander owners say
Transmission & drivetrain all 227 →
The contact owns a 2021 Toyota Highlander. The contact stated his wife pulled into a parking spot and turned off the engine while the vehicle was in reverse. The vehicle then switched gears to neutral on its own, started reversing, and slightly crashed into the rear of another vehicle. The warning message "Put Transmission Into park Illuminated". The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed or repaired. The approximate failure mileage was 2000.
The contact owns a 2021 Toyota Highlander. The contact stated that while driving at an undisclosed speed, there was a whining sound coming from the vehicle. There was no warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed with transmission failure. The dealer stated that the transmission needed to be replaced. The vehicle was repaired. After the vehicle was parked and turned off, there was transmission fluid leaking from the vehicle. There was no warning light illuminated. The vehicle was taken back to the dealer, where it was diagnosed and determined that the head gasket had failed and needed to be replaced. The vehicle was repaired. The contact then noticed fluid leaking from the transfer case while the vehicle was parked and turned off. …
Brakes all 68 →
Upon attempting to engage the brakes, it was found that they did not work. Immediately thereafter, the car began an uncommanded full acceleration. The insurance company has totaled the car. Our safety as occupants was obviously at serious risk. The driver chose to take the car off the road rather than jeopardize the lives of others on the same road. The car plowed through boulders and trees, coming to rest upside down wedged between an earthen berm and a tree......suspended about 2 feet above the ground. There were no warnings prior to the incident. The car has been inspected by the insurance company, and has been authorized for inspection by the manufacturer. There were no serious injuries as a result of the accident. We were VERY lucky! Uncommanded acceleration without any control is a frightening event any time....but definitely in the vicinity of other vehicles full of families.
The contact owns a 2021 Toyota Highlander. While driving 20 MPH uphill, the messages "Engine Failure," "Brake Failure," and "Pull Over to A Safe Place, See Owner's Manual" were displayed, and several unknown warning lights illuminated. The contact turned off and restarted the vehicle, but the failure persisted. After a second restart, the message "See Dealer" was displayed with the check engine warning light illuminated. After a third restart, the vehicle was driving rough while the accelerator pedal was depressed. The vehicle was taken to the dealer. The manufacturer was notified of the failure by phone. The failure mileage was approximately 123,000.
Body & structure all 52 →
The contact owns a 2021 Toyota Highlander. The contact stated that on various occasions, water was leaking into the vehicle from the roof rack. The contact stated that there was a bad odor in the vehicle. The vehicle was taken to a local dealer, where the failure could not be duplicated, and the mechanic stated the smell was possibly from a spill. The failure reoccurred, and the vehicle was taken back to the dealer, where it was diagnosed that there was black mold in the air bags, floorboards, headliner, and various other areas and that the vehicle needed to be detailed to remove the mold. The vehicle was repaired; however, the contact then stated that there was condensation seen in various areas inside the vehicle, windows were failing to operate, and the headliner was sagging. The vehicle was not taken back to the dealer. …
The contact owns a 2021 Toyota Highlander. The contact received notification of NHTSA Campaign Number: 23V720000 (Structure). The contact stated that while driving 30 MPH, an abnormal sound was coming from the front bumper. Upon inspection, the front bumper had partially detached from the vehicle. The vehicle was taken to the dealer; however, it was unknown if the vehicle was repaired. The contact also received notification of NHTSA Campaign Numbers: 23V865000 (Air Bags); however, the part to do the recall repair was not yet available. The vehicle was taken to the dealer. The vehicle was not repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The vehicle had been with the dealer for over one year. The failure mileage was approximately 15,000. Parts distribution disconnect.
2021 Toyota Highlander engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 2.5L 4-cyl hybrid | CVT | FWD | 36 / 35 / 36 |
| 2.5L 4-cyl hybrid | CVT | AWD | 35 / 35 / 35 |
| 3.5L 6-cyl | 8-speed automatic | FWD | 21 / 29 / 24 |
| 3.5L 6-cyl | 8-speed automatic | AWD | 20 / 27 / 23 |
EPA ratings. Class: Small SUV.
Frequently asked questions
Is the 2021 Toyota Highlander a good car?
Based on 531 owner complaints filed with NHTSA, the 2021 Highlander rates avoid: 4.3× as many complaints as a typical year of the Highlander at the same age. It is one of the Highlander years we suggest avoiding. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2021 Toyota Highlander?
The transmission & drivetrain — 227 complaints, 43% of all complaints for this model year, most often about automatic transmission. Next are the brakes (68) and body & structure (52).
How many recalls does the 2021 Toyota Highlander have?
There are 4 recalls for the 2021 Toyota Highlander, the most recent from March 5, 2026 (recliner). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Toyota Highlander?
The best years by complaints, compared at the same age, are 2025, 2016 and 2014. Years to avoid or approach with caution: 2021, 2019, 2023, 2022 and 2020. See the full Toyota Highlander years comparison.
At what mileage do 2021 Toyota Highlander problems happen?
The median mileage reported in complaints is about 27,000 miles; 64% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.