2020 Toyota Highlander Problems

2020 Toyota Highlander problems owners report most

2020 Toyota Highlander problems are documented in public: owners have filed 331 complaints with NHTSA, the earliest in 2020 and the most recent in 2026. Sorting those by the component the filer named puts the powertrain clearly first, at 126 of the 331 complaints, two of every five filed.

A complaint is not a repair bill and not a defect finding. It is one owner telling the regulator something went wrong. What makes the count useful is the concentration: when one component takes 38 per cent of everything filed on a car, the pattern is doing more than chance.

Against the 2019 car, this model year has drawn 36 per cent fewer complaints (331 against 514). Both years are led by the powertrain, so this is a fault that carried over rather than one introduced with the 2020 car.

Of those complaints, 16 describe a crash and 0 describe a fire. Filers reported 20 injuries.

Recalls on the 2020 Toyota Highlander

A recall means the manufacturer or the regulator found a safety defect, and the repair is free at a franchised dealer however old the car is. There are 5 recalls on this model year. Your own car may be covered by some, all or none of them, so check the VIN rather than the model.

In owners own words

These are complaints filed about the powertrain, quoted as written. They are one persons account rather than a diagnosis, and they are here because a symptom described by a driver is easier to recognise than a component name.

At approximately 72,000 miles, my 2020 Toyota Highlander Platinum was diagnosed by my dealership with a failing transmission that requires full replacement. I first began hearing a high-pitched whining noise during light acceleration shortly after a routine oil change, at some point between 60,000 and 70,000 miles. I did not immediately recognize it as a drivetrain issue until the symptoms worsened. This model uses Toyota’s UA80 8-speed automatic transmission, which has been the subject of Technical Service Bulletin T-SB-0008-21 and a Customer Support Program (ZJC) for earlier Highlander mod

• What component or system failed or malfunctioned, and is it available for inspection upon request? The UA80 8-speed automatic transmission assembly (specifically internal mechanical wear resulting from front carrier assembly bearing degradation/torque converter heat buildup). No, the component and the contaminated transmission fluid are currently being replaced at the dealership. • How was your safety or the safety of others put at risk? The severe mechanical wear and metal-on-metal degradation inside the transmission create an imminent hazard where the vehicle can experience sudden slippi

I am submitting this complaint regarding a sudden and unexpected transmission failure in my 2020 Toyota Highlander. The vehicle experienced a major transmission malfunction without any prior warning signs, dashboard warning lights, diagnostic messages, or noticeable drivability issues. The failure occurred suddenly when the vehicle would no longer shift into reverse. When placed in reverse gear, the vehicle does not move. Additionally, when placed in drive, the transmission slips significantly, resulting in a loss of power and unsafe operation. The vehicle is no longer reliable or safe to oper

1. The vehicle’s transmission appears to be failing. I was driving my 2020 Toyota Highlander on the freeway at about 75 mph with my family in the vehicle when the car suddenly lost power and would not accelerate properly even though the engine was still running. Because of the sudden loss of power, I had to carefully move the vehicle to the shoulder of the freeway. At the time I did not realize it may have been related to the transmission. 2.Recently I brought the vehicle to an authorized Toyota dealership for a routine oil change and because I had started hearing a whining noise when acceler

Every component, by complaint count

The full breakdown of what owners named when they filed. Components below the top ten are grouped out of this table.

How other model years compare

The same nameplate across the years we hold. Complaint counts fall naturally for newer cars because fewer of them have been on the road for long, so read the column as a rough signal rather than a ranking. In this set the 2021 Toyota Highlander has drawn the most complaints and the 2016 Toyota Highlander the fewest.

What to check on the transmission and driveline

Powertrain reports usually describe a shift that arrives late, lands hard, or hunts between gears, often worse when the car is cold or towing. Some describe a shudder at a steady cruise rather than a bang between gears.

Buying a used 2020 Highlander

Drive it from cold. A transmission fault that hides once warm is the most common thing a short test drive misses. Take it to highway speed, let it settle into top gear, then slow and accelerate again to make it downshift under load.

If you already own one

Get the fluid condition checked before anything else, and ask for the transmission control software level at the same time. Several of these complaints were answered by the manufacturer with a reflash rather than a rebuild, which costs a fraction as much.

• Test drive from cold, not after the seller has warmed it up.
• Ask whether a transmission software update exists for the VIN.
• Check the fluid condition and when it was last changed.
• Get any rebuild quote itemised into parts, fluid and labour.