Complaint volume
475 consumer-submitted complaints are matched to this model year. Treat the count as a research signal, then read the actual summaries for repeated symptoms.
Complaint records
2021 Toyota Highlander Complaints
475 consumer-submitted complaints on record for the 2021 Toyota Highlander, grouped by component category.
475 Total complaints
16 Crash reports
3 Fire reports
12 Injury reports
Complaint data reflects consumer-submitted reports. A complaint is not proof
of a defect, recall, or manufacturer fault. Enriched severity fields come
from official bulk records when the complaint can be matched by ODI number.
Buyer interpretation
How to use these complaints before buying
Complaint records are most useful when they turn into inspection points, seller questions, and comparison checks against nearby model years.
Pattern to inspect
The most common categories are power train, service brakes, unknown or other. Use those categories as a test-drive checklist instead of judging the vehicle from the total count alone.
Severity flags
Enriched records include 16 crash reports, 3 fire reports, 12 injury reports, and 0 fatality reports. These fields come from complaint records and should be read in context.
Mileage clue
Mileage is available on 38 complaints, with an average reported failure mileage of 26,599 miles. Compare that with the mileage on the listing.
Questions to ask the seller
- Have you had any problems related to power train, service brakes, unknown or other?
- Can I see recent maintenance and repair records?
- Has the vehicle ever been towed, involved in a crash, or repaired for the same issue twice?
- Can we also check the recall record for this 2021 Toyota Highlander?
Used-car checklist
Use these complaints before the test drive.
Build a buyer checklist to turn these issues into questions and inspection points.
2021 Toyota Highlander
Build buyer checklist Compare with other years Sends year, make, and model to pre-fill your checklist.
How severe are the 2021 Toyota Highlander complaints?
16 Crash
3 Fire
12 Injury
0 Fatality
9 Towed
8 Medical attention
What are the most common 2021 Toyota Highlander complaint categories?
POWER TRAIN 175
SERVICE BRAKES 47
UNKNOWN OR OTHER 41
AIR BAGS 35
STRUCTURE 33
ENGINE 27
FUEL/PROPULSION SYSTEM 23
ELECTRICAL SYSTEM 13
TIRES 8
VISIBILITY/WIPER 8
475 total complaints on record
Latest complaints
| Date | Component | Summary | Severity | Mileage |
|---|---|---|---|---|
| Apr 2026 | POWER TRAIN | 2021 Toyota Highalnder UA80F Transmission Whine / Known Defect - Potential for Sudden Failure I own a 2021 Toyota Highlander Platinum V6 AWD (UA80F 8-speed automatic transmisstion) purchased in July 2021. Current milage is 78k. Starting 3 days ago I noticed a faint whine noise coming from the transmission. The pitch changes with speed and when the throttle is depressed (It's louder under load/acceleration). This matches the exact symptoms described in Toyota TSB T-SB-0008-21 for whine/grind noise caused by the front carrier assembly pinion shaft issues in 2021 Highlanders with UA80 transmissions. On April 27, I went to a Toyota dealer to confirm the source of the noise and diagnose. As per their diagnosis report "Tech took vehicle on road test to duplicate concern, after confirming complaint vehicle was then lifted up and inspected while under a load, tech as able to isolate noise to transmission at this time, fluid level and condition was inspected to ensure there were no signs of shavings or discoloration and after inspection tech found nothing abnormal during fluid level check. Tech then ran a health check to ensure there were no DTC present related to transmission concern and found no DTC present. Recommend replacing transmission and torque converter at this time". They provided a quote of $9,392. This condition represents a safety concern because the internal wear can progress to harsher shifting, loss of power, limp mode, or complete transmission failure while driving, potentially causing a crash or stranding the vehicle in traffic. I have audio/vehicle recordings of the whine and service records showing regular Toyota dealer maintenance. I am requesting the the NHTSA investigate this ongoing UA80 transmission issue as it appears to be a known manufacturing or design defect tat continues beyond the narrow TSB applicability and warranty limits. | Crash: No Fire: No | Unknown |
| Apr 2026 | POWER TRAIN | Car makes a high pitched whining noise at low speeds of approx. 10-30 mph | Crash: No Fire: No | Unknown |
| Apr 2026 | POWER TRAIN | The contact owns a 2021 Toyota Highlander. The contact stated that there was an abnormal winding sound coming from the vehicle while accelerating. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed with transmission failure. The vehicle was not repaired. The contact called a transmission shop and was informed that the part to repair the vehicle was on back order. The manufacturer was contacted, opened a case, and referred to the NHTSA Hotline to report the failure. The failure mileage was approximately 106,000. | Crash: No Fire: No | 106,000 |
| Apr 2026 | STRUCTURE | Rear power lift gate routinely malfunctions, stopping partway while opening or closing. Dealer recommends resetting the lift gate, which occasionally works to address the problem but is not a reliable fix. Issue has been ongoing for several years without remedy. | Crash: No Fire: No | Unknown |
| Apr 2026 | POWER TRAIN | 2021 Toyota Highlander transmission failure | Crash: No Fire: No | Unknown |
| Apr 2026 | POWER TRAIN | My automatic transmission failed per the dealership and is just outside of the warranty but is considered a premature failure based on the expected life of the vehicle. | Crash: No Fire: No | Unknown |
| Apr 2026 | POWER TRAIN | I am an owner of a 2021 Highlander XLE AWD (bought new). In October of 2024 around 34000 miles the transmission started to make a whining noise and seemed to be surging/bucking , hesitation and hunting for gears. Toyota determined it fit the criteria of a TSB to have the transmission replaced. The dealership had my car for two months and then eventually replaced the transmission with a remanufactured unit. This “new” unit still has the issues of surging/bucking , hesitation and hunting for gears. I fear that this “new” transmission is in the process of failing again with less than 10k on it. Of course I will be out of warranty when it does and I’ll be on the hook for a $10000 repair. I’m appalled that Toyota has not done a true fix for this issue and has not even put an extended warranty on it either. I purchased this vehicle from Toyota on good faith that it would last and be reliable. 34k one transmission died and I’m sure this one will follow suite. Ultimately UA80 transmission is ticking time bomb and Toyota needs to be held accountable for this. | Crash: No Fire: No | Unknown |
| Apr 2026 | POWER TRAIN | Transmission has failed as have many others of the same year make and model without acknowledgement of a manufacturer defect | Crash: No Fire: No | Unknown |
| Apr 2026 | FUEL/PROPULSION SYSTEM | This appears to be a fuel pump or something with the fuel issue on a 2021 Toyota Highlander L series. While driving it would stop and switch off at stop lights and stop sign. The codes that come up have to do with fuel being lean. However this also affects the braking system and causes it to be very hard to steer with this issue. The problem I have is that it cuts off without even you knowing what's happening and I was almost rear-ended twice. My car is now sitting outside unable to start. It doesn't even have 85,000 miles on it with all these issues. I believe it also said something about my transmission but unsure because the codes were flashing off and on. | Crash: No Fire: No | Unknown |
| Apr 2026 | POWER TRAIN | Transmission Failure. Had to have it replaced. | Crash: No Fire: No | Unknown |
| Apr 2026 | STRUCTURE:BODY | Rear lift gate doesn't fully open or close sometimes. I have to manually assist in opening or closing after trying the key fob, inside push button and rear switch above the license plate. I have attempted to reset the height adjustment thinking it would fix it, with no success. I have made sure that the gasket is in place, lubricated the struts and tried opening a closing with the car running and again without success. I'm asking this be investigated due to my concern that this is going to be a safety issue if it doesn't open after an accident, to exit the vehicle if needed. Thank you. | Crash: No Fire: No | Unknown |
| Apr 2026 | POWER TRAIN | The vehicle experienced a transmission failure at approximately 62,000 miles, which required a transmission replacement. Toyota replaced the transmission with a rebuilt transmission. Immediately after the repair, the vehicle began experiencing multiple issues that were not present prior to the repair. The vehicle initially would not reverse, and the battery was drained shortly after the repair was completed. Following the repair, the vehicle has continued to experience ongoing electrical malfunctions, including dashboard warning lights, system alerts, and dash lights flashing during remote start. The vehicle has also developed a rattling noise underneath the vehicle. The exact failed component has not been clearly identified. The dealership has provided changing diagnoses and has not provided written diagnostic documentation despite requests. The vehicle has been inspected by the dealership multiple times; however, the issues have not been resolved. During a recent diagnostic, the dealership stated that the catalytic converter is now the issue, but this does not address the ongoing electrical problems. These issues raise safety concerns due to unpredictable vehicle behavior and potential failure of critical systems while driving. Warning lights and system errors began appearing after the transmission repair and have continued since that time. The vehicle is available for inspection upon request. | Crash: No Fire: No | Unknown |
| Apr 2026 | ENGINE | When accelerating at all, the engine emits a whining noise. The only time the whine stops is when the foot is removed from the pedal. It does not whine at idle. I believe it is the transmission going bad. The problem has been confirmed by a local service center. No warning lamps or messages have appeared. | Crash: No Fire: No | Unknown |
| Apr 2026 | POWER TRAIN | A whining noise was observed at around 78k miles. Brought to the dealer and they indicated parts in the transmission are failing and it requires replacement. They said this has been happening more frequently on 2021 Highlanders (also see T-SB-0008-21). It's also a well-documented issue online. My contact with Toyota was that they did not intend to cover any repairs as the vehicle is out of warranty, even though it's not an isolated issue. They would not disclose how many vehicles have reported this issue. I believe it has reached safety recall-level. | Crash: No Fire: No | Unknown |
| Apr 2026 | POWER TRAIN | The contact owns a 2021 Toyota Highlander. The contact stated that the vehicle experienced transmission failure while driving. There was an abnormal whining sound coming from the vehicle while accelerating, and the sound increased in volume while driving. There was no warning light illuminated. The vehicle was taken to the local dealer, where it was diagnosed with an internal transmission failure. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 55,803. | Crash: No Fire: No | 55,803 |
| Mar 2026 | ELECTRICAL SYSTEM | The vehicle experiences intermittent power steering malfunction while driving. Warning messages including “Power Steering Malfunction” and “Low Voltage Abnormality” appear, and the steering wheel becomes stiff and difficult to turn. This has occurred multiple times during normal driving conditions, including at low speeds and while turning. When the issue occurs, it requires increased effort to steer, creating a risk of loss of control. Additional warning messages have included AWD malfunction, pre-collision system malfunction, and lane tracing assist malfunction. These alerts appear simultaneously with the steering issue. The problem began shortly after purchase and has continued intermittently. The vehicle has been inspected, but the issue has not been resolved. This condition creates a safety risk, especially when driving with passengers. | Crash: No Fire: No | Unknown |
| Mar 2026 | POWER TRAIN | Transmission has started to whine, my understanding is this is common for the transmission I have. I have had this verified by 2 different garages. There are no engine lights showing. The noise started around 90K. | Crash: No Fire: No | Unknown |
| Mar 2026 | POWER TRAIN | My 2021 Toyota Highlander was my first car I purchased that I saved up for and has had a sudden issue accrue with a winning sound out of now where. I took it to the dealer ship and they told me I need a new transmission. My vechile only has 73k miles and I noticed this sound is getting worst and worst. I don’t know what to do so I turned to the internet and I was blow away to see how many people have this same issue with the same year and it’s been happing to so many people. I am a father of a special needs child and I sport my family on my own I can not afford to replace this and they won’t do anything for me. I beg anyone that reads this to please help us out cause this is not fair they we pay our hard earned money to get hit with this unexpected issues that they obviously know about but want do anything cause it will ruin there rep. | Crash: No Fire: No | Unknown |
| Mar 2026 | POWER TRAIN | Upon inspection at my local Toyota dealership, the UA80F 8-speed transmission on my 2021 Toyota Highlander has a known whining noise attributed to a failed transmission pump. The whining noise occurs when the car accelerates from 0 to around 50 miles per hour. When it gets to highway speeds, there is no noise. Anyone in the car can be put at risk if the transmission stops functioning on the roadways, and we're left stranded or we're suddenly blocking traffic. This issue is a known issue according to T-SB-0008-21, and there are many people online who seemed to have encountered this issue even beyond the warranty limits of 5 years/60,000 miles. Even my local AAMCO tells me that this is a dreaded and known issue of past customers. This issue first appeared around the 60,000 miles of distance traveled. There is no warning for this problem. You just have to be fortunate enough to discover the noise before the warranty deadlines. I discovered the noise at around 58,000 miles around June 2025, but I didn't know it was an issue back then. Had I known about this, I would've still qualified for the warranty. This noise has been reproduced and confirmed by my local Toyota dealership, and they're quoting me $11,506.53 to fix this issue. Other 3rd party transmission shops are quoting me ~$6,000. I'm frankly frustrated that Toyota did not issue a recall for this known issue that I did not cause. I wanted to drive this car for life, but I'm unsure what to do now. Either pay an exorbitant amount of money or sell it. | Crash: No Fire: No | Unknown |
| Mar 2026 | POWER TRAIN | Transmission failure @110,000miles and a $9000.00 replacement cost. Service advisor at Toyota Dealership indicated they have seen other similar failures on this Highlander Platinum Model at their dealership but unit is out of warranty by a few thousand miles | Crash: No Fire: No | Unknown |
| Mar 2026 | POWER TRAIN | 2021 Toyota Highlander xse all-wheel drive model. Transmission failure: unusual sounds started just after 60,000 miles. Transmission began to whine mid-70,000 miles. Repair costs $8,000. Transmission business recommends rebuilding the Transmissions due to poor design and known issues. | Crash: No Fire: No | Unknown |
| Mar 2026 | POWER TRAIN | My 2021 Toyota Highlander is experiencing a transmission issue causing a high pitched whining. It has the problematic UA80F. Toyota has declined to remedy the problem even with it being a known issue. | Crash: No Fire: No | Unknown |
| Mar 2026 | POWER TRAIN | During acceleration above 25 mph a noticeable whining sound is heard from the transmission. When not acceleration the sound goes away. The vehicle only has 72300 miles | Crash: No Fire: No | Unknown |
| Mar 2026 | POWER TRAIN | The transmission began making a wheezing sound. The dealership looked at the vehicle and determined it needed a new transmission. This is a known problem. Toyota issued a service bulletin on the issue in February 2021. I purchased the vehicle a few months after that. T-SB-0008-21 | Crash: No Fire: No | Unknown |
| Mar 2026 | SERVICE BRAKES | When slowing down to stop and the brake is depressed, multiple occasions where the brakes don’t catch. The car jerks forward and I am unable to engage the brakes. I have ended up in the middle of an intersection due to this. It happens frequently, and Toyota continues to brush me off. | Crash: No Fire: No | Unknown |