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EnginePart report

2003 Toyota Highlander Engine Problems

Complaints
41about this part
Share
16%of 258 total for the year
Median mileage
115,000miles
Trend
RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.

NHTSA recorded 41 complaints about the engine of the 2003 Toyota Highlander, 16% of the 258 complaints for this model year. Where a mileage was given, the median is 115,000 miles. 1 of these say a crash was involved, according to the filers.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“Head bolts stripped in engine , 66k miles - coolant loss - all mechanics prefer to swap engine - Toyota service shop by me quoted me 5,000 for an engine and 1 year warranty. The car is worth 8,000 tops. Heartbroken by this - will have to find a way to make repairs on my own and hope to drive again.”

NHTSA complaint #11076109, filed 2018-03, 66,000 miles

“Noticed white smoke coming out of the tailpipe in june. Then I noticed reddish/pink fluid accumulating on garage floor in july. Took it in assuming either a coolant or transmission fluid leak. Toyota told me I needed a new engine because the back headbolts were stripped and the head gasket was blown. All this was determined without removing valve cover and cams, but instead because it's a known issue. Many owners report the same thing on message boards.”

NHTSA complaint #10626722, filed 2014-08, 78,000 miles

“Driving in town traffic, car overheated for the first time ever having this car. Thought it was probably a thermostat so took to firestone, they called and said I have a blown head gasket! At only 95000 miles. I have babied and had every single regular service done to this vehicle since it was the first new car I ever bought. I thought toyotas were long lasting vehicles. Apparently not. I'm going to have to come up with over $2000 dollars to have it repaired. …”

NHTSA complaint #10508545, filed 2013-04, 95,000 miles

“My 4 cylinder engine overheated very quick, very high, causing a gasket to blow. Upon repairing the catalytic converter and gasket, the mechanic ran into another issue that I've been reading about happening to others, the threads are stripped where they hold the engine block. Something needs to be done. There are too many people writing about having this issue for it be a rare occurrence for this type of vehicle. The costs are high to fix and Toyota needs to help rectify the problem.”

NHTSA complaint #10550530, filed 2013-11, 126,621 miles

“I was backing my car from across the street. After shifting to drive, my car jumped back in reversed full speed crash in to my garage. I had my foot on the brake but wouldn't stop till it hit my garage wall.”

NHTSA complaint #10532286, filed 2013-07, 77,867 miles

Related service bulletins

Engine: other model years

YearComplaintsShare of year
2024512%
20232815%
2022114%
2021479%
2020175%
20197114%
20183513%
20174717%
201698%
2015105%
201432%
20133215%
2012179%
2011179%
2010126%
20092317%
20085814%
200776%
2006197%
200563%
2004166%
20034116%
200272%
200121%

Other parts of the 2003 Toyota Highlander

Engine cooling
46 complaints
Visibility (wipers, defrost, mirrors)
34 complaints
Brakes
33 complaints
Vehicle speed control
28 complaints
Body and structure
18 complaints
Electrical system
15 complaints
Exterior lighting
15 complaints
Transmission and drivetrain
13 complaints
Other or unknown
11 complaints
Fuel system
10 complaints
Air bags
9 complaints
Tires
7 complaints

← All problems reported for the 2003 Toyota Highlander

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology