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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%).

NHTSA data checked September 13, 2026
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Drivetrain complaints
109
engine, transmission, fuel
Total complaints
264
this model year
Fires reported
1
owner-reported
Recall campaigns
5
23 crashes · 25 injuries

Complaints by component

POWER TRAIN64 · 24%
SERVICE BRAKES58 · 22%
UNKNOWN OR OTHER43 · 16%
ENGINE33 · 13%
ELECTRICAL SYSTEM24 · 9%
FUEL/PROPULSION SYSTEM22 · 8%

The years either side

2010
13%
27 of 238
2011
19%
32 of 186
2012
15%
27 of 191
2013
25%
47 of 211
2014
8%
11 of 137
2015
13%
22 of 190
2016
15%
14 of 109
2017
54%
134 of 265
2018
45%
109 of 264
2019
68%
308 of 478
2020
56%
155 of 311
2021
59%
272 of 508
2022
30%
63 of 239
2023
28%
45 of 177

Manufacturers fix things mid-generation. A bad year next to a clean one is common; the fix usually arrived in between.

Cleaner alternatives

Same car, a better year

Other midsize SUVs with no elevated signal in 2018

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

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.

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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.