2020 Toyota Highlander — Known Issues & Recalls

Your 2020 Toyota Highlander's transmission may be failing. While driving on the freeway at 75 mph, your car suddenly lost power and wouldn't accelerate despite the engine still running, forcing you to pull over in traffic—a dangerous situation. A Toyota dealership confirmed the transmission needs replacement (estimated $9,800) after you also noticed whining noises during acceleration above 30 mph. The repair will likely involve a complete transmission replacement.

Your transmission suddenly failed without warning. You'll need professional diagnosis to determine the extent of the damage and what repairs are necessary to restore your vehicle to working condition.

Your 2020 Highlander's transmission jerks and hesitates when accelerating at low speeds. You reported this problem to the dealership while still under warranty, but they didn't diagnose it. Now, 7,000 miles after your warranty expired, the transmission needs to be replaced. Toyota has refused to cover the repair under warranty, even though this 8-speed transmission has known production defects from 2017-2022 model years.

Your Highlander makes a noticeable whining noise when you accelerate, even though shifting feels normal and the transmission otherwise works fine. This issue appears to match a known Toyota technical bulletin about a bearing failure in the transmission's front carrier assembly. Dealers are recommending a full transmission replacement costing $8,000–$12,000, though Toyota has acknowledged similar problems in earlier model years without issuing a recall. The repair will likely involve removing and replacing the entire transmission or the internal bearing assembly.

Your 2020 Toyota Highlander with 83,000 miles started making a whining noise when you accelerate. A Toyota dealership diagnosed a transmission issue and quoted you $9,403.77 to replace the entire automatic transmission. The problem appeared without warning signs despite keeping up with regular maintenance. Fixing this will require a complete transmission replacement.

Your 2020 Highlander started making a whining noise during acceleration at 45,000 miles, and Toyota's service department says it needs a complete transmission replacement. No warning lights appeared before the problem occurred. You were told this is a known issue affecting many of these vehicles, and the replacement transmission carries only a 1-year warranty despite the $8,000 out-of-pocket cost. The transmission replacement will involve removing and installing a new transmission unit.

Your transmission is shifting roughly, hesitating when you accelerate, and jerking while you drive, along with unusual noises coming from it. These issues are making your vehicle unsafe and unreliable to drive. A transmission repair or rebuild will likely be needed to resolve these shifting and performance problems.

Your transmission makes a whining noise when you accelerate, and the car hesitates or shifts inconsistently when you try to speed up—creating safety concerns while driving. The Toyota dealer has inspected the vehicle and recommends a full transmission replacement, with the dealer filing a warranty claim to see if Toyota will cover it. The repair is estimated at $8,700 and requires transmission parts that are currently on backorder.

Your 2020 Highlander is making an abnormal rattling sound when you accelerate, which started after new tires were installed. A dealer diagnosed this as a transmission failure at around 55,000 miles. The manufacturer offered partial financial assistance toward a new engine, but the vehicle has not been repaired. Fixing this will likely require a transmission replacement or rebuild.

Your 2020 Highlander is making a whining or grinding noise from the transmission that a Toyota dealer confirmed matches a known technical issue. The dealer estimated repairs at $9,000, and Toyota declined your request for warranty coverage under goodwill. While there are no warning lights, the noise suggests a transmission problem that could potentially lead to a breakdown.

Your transmission is making a high-pitched whining noise. This could indicate a fluid or internal component issue that should be inspected by a mechanic soon to prevent further damage.

Your transmission failed prematurely with less than 100,000 miles on the vehicle. You noticed a whining noise during acceleration, and a mechanic determined the entire transmission needed replacement at a cost over $10,000. Toyota denied your request for financial assistance with the repair. A complete transmission replacement will be required to restore normal operation.

Your sunroof panel suddenly shattered while your vehicle was stopped at a traffic light. You were fortunate that the interior shade was closed, which prevented glass from entering the cabin. The sunroof will likely need to be completely replaced.

While driving on the highway, your sunroof spontaneously shattered, creating a large hole in the glass. You may have heard a loud noise similar to a gunshot at the moment of failure. Repairing this issue will likely require replacing the entire sunroof glass panel and possibly the sunroof assembly.

Your 2020 Highlander is experiencing delayed acceleration and a loud whirring noise from the transmission when you press the gas pedal, which stops immediately when you release it. This delayed response creates a serious safety risk, especially when merging into traffic or starting from a stop. Your transmission has been diagnosed as failed and will likely need to be removed and replaced.

Starting around 120,000 miles, your Highlander has developed a noticeable shudder or vibration when driving between 40–50 mph, and the transmission shifts with delays. Most concerning is that the engine hesitates and loses power when you try to accelerate or merge into traffic — the car doesn't respond quickly to pressing the gas pedal, which creates a safety risk. Two Toyota dealerships both suspect this is a torque converter or transmission failure requiring a complete transmission replacement. The fix would involve replacing the transmission assembly, which is a major repair.

Your 2020 Highlander's transmission is making a noticeable whining noise during acceleration and isn't shifting smoothly—it hesitates and responds slowly when you press the gas pedal. This delayed acceleration can make it unsafe to merge into traffic or respond quickly to changing road conditions, increasing collision risk. Three mechanics have told you the transmission needs to be completely replaced to make the vehicle safe for long-term driving.

You've visited the dealer at least 6 times to get recall 23V-865 repaired, but each time you've been told the repair isn't available yet—most recently in December 2025. This is a safety recall for your airbag system, and you're waiting for the manufacturer to release the fix so the dealer can complete the work.

Your rear-view camera screen goes black when you shift into reverse, making it impossible to see what's behind your vehicle. This problem happens every time you try to back up. While Toyota is aware of the issue, they haven't provided a solution, and you haven't had it repaired yet. The fix will likely involve diagnosing the camera system or display unit and replacing the faulty component.

Your 2020 Toyota Highlander Hybrid may experience a sudden forward lurch when braking downhill as the braking system switches from regenerative to hydraulic braking. This unexpected motion can be alarming and may require extra effort to safely slow the vehicle, particularly on steep grades. Toyota has identified this issue in a service bulletin and recommends reprogramming the brake actuator control module to fix it.