2003 Toyota Avalon Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Toyota Avalon
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2003 Toyota Avalon ProblemsIgnition Coil May Fail After 100,000 Miles
On higher mileage vehicles, an engine misfire may develop and/or the Check Engine Light may illuminate due to a failed ignition coil. It is not uncommon to replace all the coils when the first one fails in order to prevent return trips to the repair shop.
At higher mileages, (125,000-150,000) the automatic transmission may not shift correctly. This can be caused by the throttle position sensor being out of adjustment or a shift solenoid needing to be replaced. Typically the transmission does not need to be completely overhauled.
The Evaporative system may have problems with the vapor canister releasing charcoal pellets that plug the vent valve. Typically a Code P0441, P0442 and P0446 will be set. The key code is the P0446 which is a vent valve electrical failure. The proper repair is to replace the entire canister with all the valves as a unit. This is located on top of the fuel tank and is expensive. Our Technicians tell us that for awhile Toyota was covering these problems, but this may have changed. It would not hurt to call the dealer if this problem occurs to see if Toyota is still helping with these repairs.
2003 Toyota Avalon QuestionsWould like to see the engineer that put the turn signal relay behind the parking brake change it thank you toyota (1 answer)
2003 Toyota Avalon RecallsUnexpected Airbag Deployment
The airbag control module can fail prematurely due to electrical noise beyond the tolerance it was designed for. As a result the front airbags, side airbags, and/or seatbelt pretensioners could deploy inadvertently while the vehicle is being operated, increasing the risk of personal injury and/or a crash. Dealers will replace the airbag control module and front and/or side impact sensors as required to correct this concern.
Circuits in the supplemental restraint system may short, resulting in damage that may unintentionally deploy the front air bags and / or seat belt pretensioners. Dealers will install a noise filter between the air bag control module and the affected wiring harness free of charge to resolve the concern.
Toyota is recalling 2000–2004 Avalon models due to improper casting of the steering lock bar, which may cause the bar to crack or even break. If the bar breaks, the steering wheel will lock, causing the driver to lose control of the vehicle, increasing the risk of a crash. Dealers will replace the steering lock device free of charge.