Models with electric sliding doors can develop problems with the door mechanism. The cable in the door becomes frayed, which will damage the electric motor.
Resources for the Repair and Maintenance of your 2003 Toyota Sienna
2003 Toyota Sienna
2003 Toyota Sienna Problems
One or more oxygen sensors may fail resulting in illumination of the Check Engine Light.
The Check Engine Light may illuminate due to an evaporative emission (EVAP) system fault. Our technicians tell us these EVAP system faults can be difficult to diagnose but it is not uncommon to find a failed charcoal canister or a loose or worn gas cap.
The mass air flow sensor on higher mileage cars occasionally needs to be cleaned or replaced if sluggish acceleration is experienced or the Check Engine Light is illuminated with a mass air flow meter sensor fault code stored.
Sludge can build up in the engine because Toyota did not recommend frequent enough oil changes. Lexus will sometimes offer a discount on cleaning the engine if necessary. Owners who changed their oil every 3,000 miles did not experience these problems. This sludge build up can lead to excessive oil consumption.
2003 Toyota Sienna Recalls (Recent)
RepairPal Expert Overview:
Toyota is recalling 1998–2010 Sienna models manufactured or registered in twenty-two Eastern and Midwestern states because of problems with the spare tire carrier and assembly cable due to road salt corrosion. This may cause the spare tire assembly cable to break and the spare tire to separate from the vehicle, increasing the risk of a crash. Toyota will notify owners via letter with instructions on how to remedy the problem. For a list of the affected states, call Toyota at 1-800-331-4331.
2003 Toyota Sienna Questions and Answers
Where is the circuit fuse for my oxygen sensor?
How do I replace or fix my Oxygen Sensor ???
What does it mean when the battery light comes on?
How much should it cost to replace the Idle Speed Air Control Valve?
2003 Toyota Sienna Reviews
I bought it new. It is now at 108K. Nothing has gone wrong except one thermostat and word out brakes. Chaged timing belt and water pump at 100K. This is a completely reliable great car. I plan to give it to my son and expect that it will go another 100K miles.