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 170
SERVICE BRAKES 41
UNKNOWN OR OTHER 36
STRUCTURE 34
AIR BAGS 28
FUEL/PROPULSION SYSTEM 22
ENGINE 14
POWER TRAIN,ENGINE 8
TIRES 8
VISIBILITY/WIPER 7
475 total complaints on record
Latest complaints
| Date | Component | Summary | Severity | Mileage |
|---|---|---|---|---|
| Jul 2025 | POWER TRAIN | When our vehicle reached about 70,500 miles (10,000 miles past when the powertrain warranty expired), the vehicle started making high-pitched whining noises when the gas pedal was depressed. We brought it to the Toyota dealership and were advised that the vehicle's transmission needed to be replaced and were quoted $9,700. This is for a vehicle that was only 4 years old!! We do not feel that this is a repair/issue that a consumer must bear the cost of! When we shared this with the Toyota technician, he stated that unfortunately, the Highlander's powertrain warranty expired at 60,000 miles. We understand that Toyota was aware of this issue and this should have been escalated as a NHTSA recall where the manufacturer should be responsible for the cost of repair and/or replacement, not the consumer. Please assist us with obtaining a satisfactory resolution with this. | Crash: No Fire: No | Unknown |
| Jul 2025 | UNKNOWN OR OTHER | The sunroof glass on our 2021 Highlander unexplainably shattered on our ride home on 7/20/25 at approximately 12:30PM. Sky was overcast, and the temperature was in the mid 80's. We had just entered the highway and were still accelerating to highway speed. We were not near a pedestrian overpass where a rock could have been tossed from above. Broken glass edges are pointing upward. The sunroof was in the fully closed position and not tilted. Safety would have been at extreme risk if we did not have the inner slide closed. The vehicle has not yet been inspected by the Toyota dealership or insurance. | Crash: No Fire: No | Unknown |
| Jul 2025 | STRUCTURE | Dull Popping noise from rear bar under seat of 3rd row | Crash: No Fire: No | Unknown |
| Jul 2025 | STRUCTURE | The contact owns a 2021 Toyota Highlander. The contact received notification of NHTSA Campaign Number: 23V720000(Structure); however, the part to do the recall repair was not yet available. An unknown local dealer was contacted. 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 contact had not experienced a failure. Parts distribution disconnect. | Crash: No Fire: No | Unknown |
| Jul 2025 | UNKNOWN OR OTHER | Transmission is making a wheezing noise | Crash: No Fire: No | Unknown |
| Jul 2025 | POWER TRAIN | Our vehicle has 72k miles at normal use- no towing or off roading. Due to a whining noise we took in the vehicle at a Toyota dealer and after a $200 diagnostic fee concluded we need a new transmission priced at $10,800. There was no explanation/diagnosis summary- just we need a new transmission. | Crash: No Fire: No | Unknown |
| Jul 2025 | UNKNOWN OR OTHER | Air conditioning lines eroded and needed to be repaired after 26,000 miles/ 3 or 4 years. A/C line repair cost was $2500. Vehicle is garage kept and cleaned regularly during winter, it should not be having rusting problems, especially in this good of condition. | Crash: No Fire: No | Unknown |
| Jul 2025 | POWER TRAIN | I purchased a 2021 Toyota Highlander in June of 2024 with about 45k miles. The transmission completely failed at 67k miles, when I brought it in to have checked in April of 2024. This is not covered under warranty and is costing 7-8k in repairs and over 3k in rental vehicles. I'm told the transmissions are on back order for 3-6 months. No lights went off in the car warning me of this. I smelled burning fumes on and off and reported it to the service dept around 59k (January 2024) miles. I did feel a jump at times, but didn't report that. After my routine oil change at the end of March of 2025, I heard a whining noise only when accelerating and would immediately stop when I released my foot. Two Toyota Service departments diagnosed my car with a failed transmission. I haven't been able to drive my car for 2 months now. My family's safety has been at risk while this issue with this transmission failure has been known and not reported to the consumers prior to my purchase in June of 2024. Potential consequences to a failed transmission while driving are as follows: -Sudden Stop or Coast to a Stop: The car might stop moving entirely, especially if internal components seize or it just loses power and I coast to a stop. -No Response to Acceleration -Pressing the gas has no effect, which is dangerous if I'd be in traffic or on a highway. -Locked-Up Transmission -Rare but possible, especially in catastrophic mechanical failure which could cause wheels to lock briefly. -Stranded | Crash: No Fire: No | Unknown |
| Jul 2025 | ELECTRICAL SYSTEM,SERVICE BRAKES | Vehicle: 2021 Toyota Highlander XSE Approximate Mileage: 92,000 Location: Boerne, TX (Texas Hill Country) ⸻ Summary of the Problem: My vehicle experienced serious electrical failure after heavy rainfall in the Texas Hill Country, where catastrophic flooding recently occurred. At a red light, the dashboard began flashing, power windows stopped working, and the electronic parking brake would not disengage. I was nearly rear-ended with my children in the car because the vehicle temporarily lost responsiveness. ⸻ Pattern of Issue: This problem only occurs after rain. Once the vehicle dries out, the systems return to normal. Toyota tested the battery and alternator and found no faults. The dealership and Toyota Corporate have been notified, but they have so far refused to approve a Goodwill Repair or perform deeper inspection for water intrusion into the fuse box, firewall harness, or Body Control Module (BCM). ⸻ Suspected Cause: I believe there is water intrusion due to a design flaw, likely through the windshield cowl or firewall. Other Highlander XSE owners have reported nearly identical symptoms following rain exposure. Toyota has issued service bulletins in the past about water reaching electrical components in other models. ⸻ Safety Concern: This is a serious safety issue. A near-crash involving my children occurred. If Toyota does not resolve this issue and it leads to an accident, I will hold them fully accountable. I am reporting this so it can be formally investigated and linked with similar complaints. | Crash: No Fire: No | Unknown |
| Jul 2025 | STRUCTURE | The contact owns a 2021 Toyota Highlander. The contact stated that while driving on the highway at 65 MPH, the front bumper became detached. There was no warning light illuminated. The contact pulled over and zip-tied the bumper to the frame of the vehicle. The vehicle was not repaired. The contact referenced NHTSA Campaign Number: 23V720000 (STRUCTURE); as a possible cause for the failure. The manufacturer was notified of the failure. The approximate failure mileage was 47,330. | Crash: No Fire: No | 47,330 |
| Jul 2025 | UNKNOWN OR OTHER,ENGINE | My 2021 Toyota Highlander experienced transmission problems mainly related to the transmission models. My vehicles reported issues such as whining or grinding noises, which were attributed to problems with the pinion shafts in the front carrier assembly. | Crash: No Fire: No | Unknown |
| Jun 2025 | POWER TRAIN | I have a high pitched whine noise during acceleration from the transmission area. The noise gets louder with acceleration but goes away immediately when I take my foot off the gas pedal and starts again when you press the gas pedal again. | Crash: No Fire: No | Unknown |
| Jun 2025 | POWER TRAIN | [XXX] [XXX] [XXX] [XXX] [XXX] Vin # [XXX] 2021 Toyota Highlander 4DR AWD XLE I am writing to report a potentially dangerous transmission defect in my 2021 Toyota Highlander XLE, at approx. 60-70k miles. The vehicle recently developed a high-pitched whining noise while accelerating, which a certified Toyota service technician suspects is internal to the transmission. This exact issue is outlined in Toyota Technical Service Bulletin T-SB-0008-21, issued February 9, 2021, for 2021 Highlanders equipped with the UA80E or UA80F 8-speed automatic transmission. According to the TSB, the cause is worn pinion shafts in the front carrier assembly, and the prescribed repair is complete transmission replacement. Unfortunately, my vehicle was just outside the 60,000-mile powertrain warranty window, despite experiencing the failure consistent with a known manufacturer defect. Numerous other owners have reported identical symptoms between 60,000–80,000 miles, often facing repair costs over $8,000 and multi-week delays due to part availability. This is not a typical wear-and-tear issue. A failure of the transmission at highway speeds or during critical maneuvers could lead to loss of power or control, posing a real safety risk to drivers and passengers. I respectfully urge the NHTSA to investigate this issue further. I am happy to provide: Thank you for your commitment to driver safety. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) | Crash: No Fire: No | Unknown |
| Jun 2025 | POWER TRAIN | The transmission has gone out on my 2021 Highlander. It was inspected by the Toyota dealer. I was told by them that this is a known issue with these trucks. There are no warning lights but just a whine when driving the car and I believe it does put my safety as well as other at risk as this could go out at any moment. | Crash: No Fire: No | Unknown |
| Jun 2025 | POWER TRAIN | There is a known defect with transmissions in certain model years of Toyota cars, mine being one of them, per this TSB: [XXX] The transmission can catastrophically fail but Toyota will not replace the defective part unless the vehicle is still under warranty. I had the Toyota dealer verify that the transmission is beginning to fail and requires replacement. The transmission has begun to emit a "whining" noise. Should the transmission fail catastrophically during operation, it could cause a sudden loss of power, seize a drive wheel, or another event causing a loss of vehicle control. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) | Crash: No Fire: No | Unknown |
| Jun 2025 | POWER TRAIN | Whine noise when vehicle is in motion and accelerating. Took it to the dealer for inspection, and advise to replace the transmission | Crash: No Fire: No | Unknown |
| Jun 2025 | POWER TRAIN | Transmission makes whine noise upon accelerating. Cannot be fixed except with new transmission. The longer you drive, the longer it affects and damages other parts. Mechanic was amazed that my relatively new Toyota needed over $10k in repairs. Toyota denying there’s a problem. | Crash: No Fire: No | Unknown |
| Jun 2025 | SERVICE BRAKES,ENGINE,FUEL/PROPULSION SYSTEM | Yesterday, as I do a couple times a month, I went to switch parking places, putting my 2021 Toyota Highlander where my 2007 Mazda was parked, in order to drive it and keep the battery from dying. After starting both cars I first moved the Mazda to make room for the Toyota. As I was slowly steering the Toyota at (idle speed) into the now vacant parking spot, the car accelerated on it's own, prompting me to hit the brakes, but to no avail. The car jumped the curb hitting, knocking over and and damaging a large ceramic planter and small tree in my neighbor's yard. My split second reaction upon having no brakes and a run away car was to push it out of drive, which ended up putting the car into reverse, causing a harsh jolt, followed by the car accelerating again on it's own, in reverse towards another neighbor's garage. I live in a condo complex, so all of this took place within about 30 feet of forward/backward/forward motion. My second split second decision (with no brakes) to avoid smashing into the garage was throwing it back into drive, which sent it accelerating back towards the parking place again. This time I had the presence of mind to push the power button on the dash, allowing me to barely come to stop before jumping the curb again. Whole thing lasted about 15 seconds. I had an appointment to attend, so after a brief conversation explaining to my (now outside) neighbor what happened, I left in the older car. Returning later in the day I found damage to the front of my Toyota and wonder if my transmission is damaged as well. I'm reimbursing my neighbor today. I've not attempted to drive the Toyota since, and am seeking your advice on how best to proceed, whether I should initiate contact with Toyota regarding this incident, or is that something you should initiate? Please advise. Thank you. | Crash: Yes Fire: No | Unknown |
| Jun 2025 | POWER TRAIN | The transmission has a whining, grinding noise and occasional jerks vehicle. I had dealership look at the vehicle and they said it's a problem with this model but Toyota has not done a recall they issued a service bulletin. I was told it needs replacement but Toyota has been reluctant to work with owners outside of the service manufacturers warranty. This proved true, I was denied any goodwill assistance, and after several days of requesting why they denied any assistance, I'm not able to get an answer. This is a safety issue that they are aware of and not taking proper acceptance and assistance in rectifying. We carry our new born and toddler grandchildren in this vehicle as well as elderly parents. The thought of a total transmission failure on a busy highway or street is terrifying, I asked the dealership service manager about the safety of driving the vehicle and he recommended not operating it until it's replaced. In my[XXX] I haven't asked the government for anything, but I am asking you to look into this matter and if called for mandate a recall.. Thanks [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) | Crash: No Fire: No | Unknown |
| Jun 2025 | POWER TRAIN | The transmission is making a whining noise when accelerating. I took the vehicle to a Toyota dealership and they said the transmission needs to be replaced. And I asked why the Highlander only has 58 thousand miles on it. How is it already going out. And they couldn’t give me an answer | Crash: No Fire: No | Unknown |
| Jun 2025 | SERVICE BRAKES | My 2021 Toyota Highlander Hybrid has a braking issue identified in Toyota Service Bulletin T-SB-0059-23, Hybrid Regenerative Brake Transition Feeling Improvement. When going downhill and applying the brake, the vehicle lurches forward temporarily as the braking system transitions from regenerative to hydraulic braking. The first time my vehicle did this, it was very alarming and I had to take additional measures to slow my vehicle as I was driving downhill. My vehicle frequently demonstrates this problem, however, I did not report it to my local Toyota dealer because I read in an online chat group that it was a characteristic of this vehicle. Although the TSB recommends a Reprogram of the Brake Actuator Assembly Control Module, the repair is only covered under the Toyota Basic Warranty which is in effect for 36 months or 36k miles, whichever occurs first. My vehicle is past the warranty limit, and because I did not report it to my dealer previously, this repair is not covered under the TSB or the Toyota Basic Warranty. Toyota Highlander Hybrid model years 2020-2022 are affected. The Technical Service Bulletin was issued August 29, 2023, so if a 2020 model Highlander Hybrid has this problem, 2020 models would have already passed the warranty limit by the time the TSB was issued and thus would not be covered. This is a safety risk as drivers can lose control of the vehicle when braking, particularly when going downhill. The Warranty should be extended, or this problem should be elevated to a RECALL so that older affected vehicles, or those with higher mileage can be covered under warranty. Drivers should not have to pay for a recognized problem that affects the safety of this vehicle and has been identified in a Technical Service Bulletin. This problem puts drivers at risk of losing control of the vehicle and the problem can be mediated with a software reprogram. T-SB-0059.23 should be elevated to a RECALL, or extended regardless of age or mileage. | Crash: No Fire: No | Unknown |
| Jun 2025 | POWER TRAIN | My transmission started whining at 63,000 miles and my mechanic said it needs to be replaced. However, there is a nationwide backorder on Toyota transmissions. That should be a sign to NHTSA that this is a widespread issue and needs a recall! Of course this was right after the 60,000 mile Toyota warranty. I have extended warranty but it doesn't cover consultations or taxes. | Crash: No Fire: No | Unknown |
| Jun 2025 | POWER TRAIN | I have a 2021 Toyota highlander platinum. The car makes whining noise when accelerating my car has 70k miles and according to Toyota my warranty expired at 60k miles it’s a common issue with these cars and Toyota knows that but they won’t help with the fix. This affected a lot of people and they want almost 11k for a trans replacement. If it’s a common issue with all their cars then they should take full responsibility and fix the cars. I hope you guys could be of help and hold they accountable. | Crash: No Fire: No | Unknown |
| Jun 2025 | POWER TRAIN | Transmission failure | Crash: No Fire: No | Unknown |
| Jun 2025 | UNKNOWN OR OTHER | My 2021 Toyota Highlander, purchased with 16k miles, has a leak in the AC system in the rear of the vehicle (as of May 2025, at 3 years 10 months into the vehicle's service, with 28k miles). This pipe runs the length of the car and costs $2000-$3000 to repair. This was confirmed at an independent service center that used leak detection dye to identify the problem. I am finding multiple reports of people having this problem in young Toyota vehicles (<4 years old) and with low miles. I believe this is a design flaw and not indicative of normal corrosion, as the vehicle does not exhibit corrosion elsewhere in the under carriage. | Crash: No Fire: No | Unknown |