2018 Toyota Highlander: engine and transmission complaints
HIGH COMPLAINT SIGNAL
45%
109 of 240 relevant owner complaints are about the engine, transmission or fuel system
45% of relevant owner complaints filed with NHTSA on the 2018 Toyota Highlander are about the engine, transmission or fuel system. That is a model-level pattern, not bad luck.
Worse than 57% of the 1,230 model years we track (2010–2023).
Excludes 24 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 41%).
Looking at a specific Highlander?Check its VIN: the full report, quotes about its own engine, and whether its recalls are still open. First report free.
The percentage is each model year's drivetrain complaint share. No elevated signal describes the model year, not any one car; a well-kept example of a flagged model can still be the right buy, and any of these still needs an inspection.
What owners reported
POWER TRAIN08/31/2026
whining sound in the transmission, including high-pitched whining, erratic shifting, clunks, hesitation, and premature failure. These vehicles are equipped with the UA80F (AWD) and UA80E (FWD) 8-speed automatic transmissions.
POWER TRAIN08/27/2026
Transmission failure happened suddenly. I pulled out of a car wash and car would not accelerate. I was in heavy traffic and car wouldn’t move.
POWER TRAIN08/20/2026
Vehicle has a high pitch whine on acceleration. Was diagnosed by Toyota dealer. Advised to replace the transmission. This VIN is not included in the CSP ZJC warranty but is a 2018 and is experiencing the same issue. Sound began at 110k miles.
Three of 109 drivetrain complaints. The full report shows more, with quotes about the engine in the car you are looking at first.
Recall campaigns on this model year (5)
FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2018-2019 4Runner, 2019-2020 Avalon, 2019 Corolla Hatchback, 2017-2019 Highlander, 2018-2020 Camry,…
FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
Toyota Motor Engineering & Manufacturing (Toyota) recalled certain 2018-2019 4Runner, Highlander, Camry, Land Cruiser, Sequoia, Sienna, Tacoma and Tundra, and Lexus RC 30…
ELECTRICAL SYSTEM
Fujian Wanda Automobile Glass Industry (Wanda) is recalling certain aftermarket Replacement Windshields sold for use in 2014-2018 Toyota Highlander vehicles. The windshi…
This does not say whether a particular car has an open, unrepaired recall. That depends on the VIN.
Before you buy a 2018 Toyota Highlander
Ask the seller whether the transmission has ever been repaired or replaced, and whether the car has shown shuddering, slipping, delayed or harsh shifts, or a whine at speed.
Drive it from a cold start and long enough to warm up. Many transmission faults hide once the car is warm.
Get an independent pre-purchase inspection from a mechanic you choose, and tell them to focus on the transmission.
5 recall campaigns on this model year. Whether a specific car still has one open depends on the VIN; the report checks that.
Ask for service records. A transmission already replaced under warranty is a different car from one that was not.
Have the VIN?Paste it and get the full report for that car. First report free, then a 30-day pass covers a whole car search.
Experimental model-level information. This is not a vehicle inspection, vehicle-history
report, financial advice or purchase recommendation. It describes patterns across a model year, not the condition
of any individual vehicle.