Complaint volume
442 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
442 consumer-submitted complaints on record for the 2021 Toyota Highlander, grouped by component category.
442 Total complaints
16 Crash reports
3 Fire reports
11 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, 11 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
11 Injury
0 Fatality
9 Towed
8 Medical attention
What are the most common 2021 Toyota Highlander complaint categories?
POWER TRAIN 146
SERVICE BRAKES 41
UNKNOWN OR OTHER 34
STRUCTURE 33
AIR BAGS 28
FUEL/PROPULSION SYSTEM 22
ENGINE 13
TIRES 8
POWER TRAIN,ENGINE 7
VISIBILITY/WIPER 7
442 total complaints on record
Latest complaints
| Date | Component | Summary | Severity | Mileage |
|---|---|---|---|---|
| May 2026 | POWER TRAIN | Subtle issues showed early when trying to accelerate to get on the freeway, the transmission would stall. It was intermittent so, difficult to show at the dealership. At around 50,000 miles I began feeling a drag in the transmission, like it was put in downhill mode. Again, it happened intermittently. At 60,000 it would lunge slightly forward when I put it in park. At 63,000 I started hearing a whining sound at acceleration. The dealership did not address my concerns until it was out of warranty and then they said I needed a new transmission. | Crash: No Fire: No | Unknown |
| May 2026 | POWER TRAIN | My 2021 Toyota Highlander was making a high pitched whine sound upon acceleration with the sound level holding steady at a consistent speed. We took the vehicle to a Toyota dealership to have it looked at and were told the transmission needs to be replaced. No other warnings were received. We are concerned about our safety if the transmission goes out while on the road. | Crash: No Fire: No | Unknown |
| May 2026 | POWER TRAIN | I own a 2021 Toyota Highlander with approximately 100,500 miles. The vehicle has developed a noticeable whining noise coming from the transmission/drivetrain area that continues to worsen over time. The noise is most noticeable during acceleration and while driving at highway speeds. I brought the vehicle to Toyota for inspection and was informed that the issue is related to the transmission. However, Toyota denied repair assistance because the vehicle is outside the powertrain warranty period. After researching the issue, I discovered multiple similar complaints involving 2021 Toyota Highlanders equipped with the UA80 transmission, including Toyota Technical Service Bulletin T-SB-0008-21 regarding “Whine or Grind Noise From the Transmission.” The symptoms described in the bulletin closely match the symptoms my vehicle is experiencing. Toyota appears aware of this transmission-related issue, yet many owners outside the warranty period are being denied coverage despite similar failures and complaints. I am concerned this may represent a broader transmission defect that could lead to premature transmission failure, unsafe driving conditions, hesitation, loss of power, or expensive repairs for consumers. I believe this issue should be investigated further by NHTSA due to the growing number of similar complaints involving whining transmission noises and transmission failures in Toyota Highlander vehicles. At this time, the vehicle has not yet experienced a complete transmission failure, but the condition is worsening and raises significant concerns regarding reliability and safety. | Crash: No Fire: No | Unknown |
| May 2026 | POWER TRAIN | My 2021 Toyota Highlander makes a whining sound when driving. Took vehicle to dealership and was told it is a $10,000 repair and repair is critical. | Crash: No Fire: No | Unknown |
| May 2026 | POWER TRAIN | My car start with a noise and just lost power in the middle of the road causing almost an accident. This was caused due to the manufacture issue for the transmissions with my car model and brand. | Crash: No Fire: No | Unknown |
| May 2026 | BACK OVER PREVENTION | The parking sensor bracket has failed twice now and the sensor keeps falling through. There are no signs of scratches or bumps on the bumper. The dealer said that’s not something they will fix. I have had it fixed once before and now it’s happening again. | Crash: No Fire: No | Unknown |
| May 2026 | POWER TRAIN | What component or system failed or malfunctioned, and is it available for inspection upon request? - Transmission is in the process of failing. Yes it is available for inspection. How was your safety or the safety of others put at risk? - Loss of power train while driving could put the operator and the public at risk. Has the problem been reproduced or confirmed by a dealer or independent service center? - Yes, I've been told by two separate Toyota dealers that my transmission needs to be replaced. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? - Yes. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? - No. | Crash: No Fire: No | Unknown |
| May 2026 | POWER TRAIN | 2021 Toyota Highlander XSE AWD with approximately 60,400 miles. Vehicle has developed a noticeable driveline/transmission humming/whining noise during acceleration, beginning at lower speeds and increasing with vehicle speed under throttle. Noise is most noticeable while pressing the accelerator and appears consistent with Toyota T-SB-0008-21 regarding transmission whine/grind concerns on UA80F transmissions. | Crash: No Fire: No | Unknown |
| May 2026 | POWER TRAIN | 60k miles on the car and the transmission needs to be replaced out of pocket due to a gear pinon wearing down. This is a 10k dollar repair and just happens to be after the warranty has expired. | Crash: No Fire: No | Unknown |
| May 2026 | POWER TRAIN | My 2021 Toyota Highlander equipped with the UA80 transmission developed a whining/grinding noise under acceleration around 73,000 miles. Toyota diagnosed internal transmission failure and recommended full replacement costing approximately $9,000. Toyota issued TSB T-SB-0008-21 acknowledging defects involving the front carrier assembly pinion shafts in these transmissions. This defect creates a potential safety hazard due to possible loss of power or drivability during highway operation. I am requesting that NHTSA investigate the widespread transmission failures affecting 2021 Highlanders and related Toyota vehicles. | Crash: No Fire: No | Unknown |
| May 2026 | SERVICE BRAKES | When applying the brakes when slowing down fro a traffic light or in traffic, the brkaes suddely stop workign for a few sseconds at a speed of 5-10 mph, causing car to lurch forward before the brakes reengage. This has existed for a couple of year but has gotten worse in thelast 6 month.s The risk is that the lurch occurs prior ot the full stop ,potentilly causing the car to run into the car directly in ftont of our car. Toyota is aware of the problem and issued a technical sevce bulletinT-SB -0059-23 whichidentified this and a software update helps in resolving the issue. The bulletin however states the cost needs ot be paid by th cusotmer if it is out of warrnaty. This does not makes snse as it is a potetnail safety issue that coudl casue a collisiion and wodul seem to rise to the level of a recall. There are many refermces to the issue on social media. It seems Toyota should be rqeuired to make this a recall item at no cost to the customer. | Crash: No Fire: No | Unknown |
| May 2026 | POWER TRAIN | I noticed transmission whining shortly after purchasing on 3/12/24. Odometer reading at purchase 62,347. I justified whining to myself as luck of the draw. Until a few months ago I started hearing grinding noise coming from the transmission. Had transmission diagnosed at Lancaster Toyota on 4/22/2026. Approximate odometer reading, 78,700. Was told that a replacement transmission was needed. Cost 9,526.17 No warning lamps or messages appeared. Transmission type UA80F SN A4A20J O 4195 | Crash: No Fire: No | Unknown |
| May 2026 | POWER TRAIN | Car was making whining sound with acceleration at 62k miles. Dealer told me I need to spend 8k on a replacement. | Crash: No Fire: No | Unknown |
| May 2026 | POWER TRAIN | Transmission. My 2021 Toyota Highlander with approximately 94,500 miles developed a consistent whining noise during acceleration. The issue occurs daily during normal driving and appears to be worsening. A Toyota dealership diagnosed the problem and confirmed the noise is coming from the transmission and that the transmission requires replacement. This appears to be a premature failure of a major drivetrain component. The condition could lead to loss of power or transmission failure while driving, creating a potential safety risk. There was no prior warning, and the vehicle has been properly maintained. | Crash: No Fire: No | Unknown |
| May 2026 | SUSPENSION | Early failure of front struts on a 2021 Toyota Highlander XLE, leaking fluid at 29,000 miles. Manufacturer does not seem to have any reported issues with these components. Issue discovered just one month after warranty expiration. Given the low daily use and time, this might be a manufacturer defect/concern. Could potentially be a safety concern affecting the vehicle handling and maneuverability. | Crash: No Fire: No | Unknown |
| Apr 2026 | UNKNOWN OR OTHER,ENGINE | My vehicle was parked for about an hr 30 min , and it started smoking from dashboard area and immediately went into flames . | Crash: No Fire: Yes | Unknown |
| Apr 2026 | LATCHES/LOCKS/LINKAGES | The rear hatchback of my Toyota Highlander fails to open. I tried resetting it and that did not correct the problem. The only way I’m able to open the trunk is by manually crawling into the trunk, removing the back panel on the hatch door and pressing an internal latch release. While no injuries have happened because of this problem, if someone was stuck in this car or if there were an accident and a passenger needed to be accessed through the rear trunk, this would create a problem as it is not accessible from the outside of the car. | Crash: No Fire: No | Unknown |
| 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,ENGINE | 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 | POWER TRAIN | 2021 Toyota Highlander transmission failure | Crash: No Fire: No | Unknown |
| 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 | 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 | 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 |