2026 Toyota Grand Highlander Problems

My 2026 Toyota Grand Highlander exhibits abnormal fluttering/vibration of the hood at speeds above approximately 25 mph. I have identified that this is the same defect documented in Toyota's own Technical Service Bulletin T-SB-0111-24 (issued December 4, 2024), which addresses this condition on 2024 model year Grand Highlander and Grand Highlander Hybrid vehicles, with the same complaint widely reported by 2025 model year owners as well. Despite this being a known, documented Toyota defect for three consecutive model years, I have been unable to get it resolved through Toyota's official channels: I contacted Toyota's PATT Lab (Parts and Technical Assistance) regarding the vibration under Dealership Task Number DC261970283. PATT Lab informed me that other 2026 model year vehicles exhibit the same condition, characterized it as "intended behavior," and closed the task without applying the known TSB remedy. I was directed to Toyota Brand Engagement for further assistance. This was opened as Case Number 260722000822. Toyota Brand Engagement stated they are not mechanics and that the issue must be resolved at the dealership level, but has provided no directive or authorization to the dealership to perform the known TSB repair. As a result, I am caught in a loop between Toyota corporate departments, none of which will authorize or perform the fix that Toyota's own engineering team has already documented and issued a bulletin for. My vehicle has a known manufacturing/design defect that Toyota has acknowledged in writing for prior model years, yet I am being told simultaneously that it is "normal" and that it's a dealership matter — while no dealership has been given authorization to apply the remedy. Requested Action: I am requesting that Toyota Motor Sales, USA be required to apply the existing Technical Service Bulletin remedy (or its 2026 model year equivalent) to my vehicle at no cost, consistent with how this defect has already been addressed for 2024 and 2025 mod

While i was closing the trunk Did press area below my license plate to close the trunk, and got a dent below the license playe. Looks like very poor quality of steel being used

Component: Automatic transmission, 2026 Toyota Grand Highlander Hybrid MAX Platinum AWD. Available for inspection. Purchased new 11/21/2025 at zero miles. Beginning ~2000 miles (est Feb 2026), intermittent transmission malfunction during acceleration: transmission holds gears at elevated RPMs beyond expected shift point, then shifts harshly or shudders violently. Documentation began 6/1/2026; current odometer 8936 miles. Occurs from 22–64 mph, most commonly 30–44 mph, in Normal and Sport modes, after cold starts, extended driving, and brief stops. RPMs typically hang at 3500–4000 before shifting. Documented incidents over the last month: June 1, 2026, 3:20 PM: Approximately 1 min after cold start, turned right at a light to 33 mph. Violent shake and abnormally loud acceleration during gear change. June 2, 2026, 3:00 PM: Turning right and accelerating after driving approximately 1 min, transmission revved high; had to release throttle to force the shift. June 11, 2026, 4:40 PM: After cold start, driving up a small incline about .4 miles away, transmission revved high and delayed shift at 35–45 mph. June 12, 2026, 3:17 PM: After 17 minutes of driving, accelerating from a cloverleaf around 25 mph to 64 mph, revved at 4000 June 19, 2026, 3:00 PM: After 2 hours of driving and a 5 min stop, turning right out of a shopping center, transmission hung up three consecutive times at 35–40 mph, RPMs at 3500–4000. June 20, 2026, 11:17 AM: Accelerating off a cloverleaf at 57 mph. RPMs hung at 4000 before shifting. June 30, 2026, 10:23 AM: Pulling out of neighborhood after backing out of driveway. RPM hang at approximately 22 mph, then again at 43 mph Safety risk: Unexpected RPM surge and violent gear change during acceleration on highway on-ramps, cloverleaf merges, and intersections creates unpredictable vehicle response at speed, presenting collision risk to driver and surrounding vehicles Dealer/service: Not confirmed by dealer. Assessed at ~6000 miles with no issues found

Failed System: Fuel Injector Failure (?) at high speeds, under load (uphill), causing an immediate and life threatening loss of power. While traveling on the highway, going up mountainous areas, the vehicle loses power and shakes violently. During multiple repairs/visits, the dealerships state that it is the failure of fuel injectors. They are replaced, and it happens again with the same explanation. Safety: Three times my family has lost power at 70mph while traveling uphill surrounded by many cars. The last event ended in a a scary and close interaction with an 18 wheel truck that was unable to stop as we lost power. Dealer Confirmation: The dealer has confirmed, on two separate occasions, that the fuel injectors needed replaced. The vehicle has 3,000 miles on it. At 2,000 miles, damage was found to the fuel injectors. They were replaced and the car was placed back in my possession. At 3,000 miles, the incident occurred for the 3rd time and damage was again found with the fuel injectors. Inspection: Dealerships as well as Toyota's field technician have inspected/repaired the vehicle 2 times and is currently at a dealership for the 3rd time. Warning messages: After the incident occurs, multiple warning lights appear (check engine and hybrid system malfunction).

When I went to turn the car on last Tuesday (3/24.2026), the entire digital dashboard was black. I tried restarting the car a few times with no resolution. Thankfully, the infotainment screen and heads up display (HUD) were on and working fine. If it was not for the HUD, I would of had no idea what my speed was driving home. However, I was unable to see my gas level or other safety features which is concerning. Once I got the car home about 15 minutes later, we turned the car off and back on and everything was fine. So far, everything has been working normally ever since. I did take a picture of the black screen as you can see for proof. Please reach out if you need more information.

The Electronic Park Brake (EPB) fails to release when the car is shifted into gear. The park brake dashboard light remains on, and the brake does not release. The problem is intermittent but has occurred multiple times in the first 2 months and 2,000 miles of owning the newly purchased vehicle. The vehicle was purchased in Nov 2025, and in Jan 2026 it was taken to the authorized Toyota service center at the Toyota dealership where it was purchased to have this issue repaired. But Toyota refused to replace any parts. Multiple photographs of the brake failure were provided to the Toyota service center, but they will not replace any parts or do any repairs related to the issue unless they can replicate the intermittent failure while the car is at the service center garage.

I haven’t had no accident in my car

2nd time ac system stoppped working with 6000. Miles on it after 3rd time same problem it will be under lemon law

When I went to turn the car on last Tuesday (3/24.2026), the entire digital dashboard was black. I tried restarting the car a few times with no resolution. Thankfully, the infotainment screen and heads up display (HUD) were on and working fine. If it was not for the HUD, I would of had no idea what my speed was driving home. However, I was unable to see my gas level or other safety features which is concerning. Once I got the car home about 15 minutes later, we turned the car off and back on and everything was fine. So far, everything has been working normally ever since. I did take a picture of the black screen as you can see for proof. Please reach out if you need more information.

The Electronic Park Brake (EPB) fails to release when the car is shifted into gear. The park brake dashboard light remains on, and the brake does not release. The problem is intermittent but has occurred multiple times in the first 2 months and 2,000 miles of owning the newly purchased vehicle. The vehicle was purchased in Nov 2025, and in Jan 2026 it was taken to the authorized Toyota service center at the Toyota dealership where it was purchased to have this issue repaired. But Toyota refused to replace any parts. Multiple photographs of the brake failure were provided to the Toyota service center, but they will not replace any parts or do any repairs related to the issue unless they can replicate the intermittent failure while the car is at the service center garage.

Failed System: Fuel Injector Failure (?) at high speeds, under load (uphill), causing an immediate and life threatening loss of power. While traveling on the highway, going up mountainous areas, the vehicle loses power and shakes violently. During multiple repairs/visits, the dealerships state that it is the failure of fuel injectors. They are replaced, and it happens again with the same explanation. Safety: Three times my family has lost power at 70mph while traveling uphill surrounded by many cars. The last event ended in a a scary and close interaction with an 18 wheel truck that was unable to stop as we lost power. Dealer Confirmation: The dealer has confirmed, on two separate occasions, that the fuel injectors needed replaced. The vehicle has 3,000 miles on it. At 2,000 miles, damage was found to the fuel injectors. They were replaced and the car was placed back in my possession. At 3,000 miles, the incident occurred for the 3rd time and damage was again found with the fuel injectors. Inspection: Dealerships as well as Toyota's field technician have inspected/repaired the vehicle 2 times and is currently at a dealership for the 3rd time. Warning messages: After the incident occurs, multiple warning lights appear (check engine and hybrid system malfunction).

Car vibrates at high speeds. Dealers idea of fixing is to "overinflate tires, drive for 45 minutes and then let hang on lift"