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EnginePart report

2003 Toyota Avalon Engine Problems

Complaints
7about this part
Share
2%of 293 total for the year
Median mileage
96,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 7 complaints about the engine of the 2003 Toyota Avalon, 2% of the 293 complaints for this model year. Where a mileage was given, the median is 96,000 miles. 2 of these say a crash was involved and 1 a fire, according to the filers.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

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

“The auto surges forward as I'm trying to stop either at a stop light or parking spot. This has happened 3 or 4 times and my mechanic said the only way to fix it would be for it to happen while he was driving it. There's no pattern to when it happens but it's scary and I'm afraid to let my wife drive it. It happened yesterday as I was coming to a complete stop before entering a 2 lane highway. The other times it happened was pulling into a parking spot and applying the brakes to stop. I now put the car in neutral when it happens and the engine is racing away. …”

NHTSA complaint #11174487, filed 2019-02, 71,000 miles

“The engine started cold and revved to 2500 RPM and then oscillated between 2500 and about 3000 RPM and never slowed down. I put the car in drive and drove it the block and a half to my house using the brake to stop at the only stop sign on the route but stopping was difficult. The next morning I experienced the same ultra-fast idle and drove the car on an errand that was about 2 miles distant. The same pattern persisted but the brakes were heating up and smelling from frequent use in keeping the car within the city speed limit. …”

NHTSA complaint #10671578, filed 2015-01, 138,766 miles

“I was involved in a collision where my passenger side front tire came off of a ledge in a construction zone at which point I lost control of the vehicle. There was no barrier in place on that side. I chose to direct my vehicle toward the mud pit on the right of the road. I corrected to the right causing the vehicle to go off of the road and nose dive through the first mud/dirt embankment. I expected the airbags to deploy on both side and front taking the speed and force of the collision with the first embankment and the yaw of the vehicle in the air. …”

NHTSA complaint #10595701, filed 2014-06, 123,000 miles

“The contact owns a 2003 Toyota Avalon. The contact stated while driving 40 mph, the vehicle started smoking and the engine stalled. The contact stated no warning light was illuminated. The vehicle was taken to an independent mechanic where it was diagnosed with the engine needing to be replaced. The vehicle was not repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 96,000.”

NHTSA complaint #11419230, filed 2021-06, 96,000 miles

Related service bulletins

Engine: other model years

YearComplaintsShare of year
2022113%
2021419%
2019710%
2017643%
2016417%
201525%
201422%
201343%
201213%
201133%
201012%
200922%
200821%
2007198%
2006123%
200573%
200431%
200372%
200211%
200111%
200042%
199911%
199622%

Other parts of the 2003 Toyota Avalon

Air bags
184 complaints
Vehicle speed control
51 complaints
Steering
19 complaints
Electrical system
18 complaints
Brakes
15 complaints
Suspension
9 complaints
Fuel system
7 complaints
Body and structure
7 complaints
Seat belts
6 complaints
Transmission and drivetrain
6 complaints
Engine cooling
5 complaints
Other or unknown
5 complaints

← All problems reported for the 2003 Toyota Avalon

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