2003 Toyota Sienna
Key Replacement - Save vs Dealer in San Diego

2003 Toyota Sienna Transponder Key Replacement - Fast, Affordable & Professional

The Crosby is the kind of place where people are busy in a very specific way. Schedules are tight, the garage is gated, and nobody has half a day to sit at a dealership.

A physician working out of an office building there called me on a Tuesday morning. The plastic head on her 2003 Sienna key had cracked through, the blade was barely holding on, and she had back-to-back patients until late afternoon. The dealer told her to bring the vehicle in. She laughed and hung up.

I got there during her lunch break. The original key was cracked badly enough that I could not use it to decode directly, so I decoded the lock cylinder mechanically at the car and cut a replacement blade to match. Then I connected to the OBD port and enrolled the new transponder chip into the immobilizer. The whole thing ran about 35 minutes in her building's garage.

She tested it herself before she walked back inside. Turned the key, engine started, stayed running. That second part matters on these, because a mis-programmed chip will start the car and shut it down almost immediately. Staying running is the confirmation.

Her car never moved. She never missed a patient. The dealer would have needed a tow, an appointment, and most of a workday to accomplish the same thing.

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