2003 Toyota Sienna Problems

RepairPal has identified the most common problems with the 2003 Toyota Sienna as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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7
Known Problems

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.

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.

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.

One or more oxygen sensors may fail resulting in illumination of the Check Engine Light.

Multiple cracks may develop on the upper surface of the dashboard. At this time, the only suggested repair is to replace the dashboard.

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.