2007 Buick Lacrosse
Key Replacement - Save vs Dealer in Ventura County

2007 Buick Lacrosse Transponder Key Replacement - Fast, Affordable & Professional

I got a call from a dentist in Ventura, over in the Juanamaria area, on a Wednesday around noon. He had a full afternoon of patients and his 2007 Buick LaCrosse would not start. He described a security light sitting solid on the dash and the car just cranking without firing.

He could not leave. He could not tow the car mid-day. He needed someone to come to him.

I pulled into his practice lot during his lunch break. First thing I did was test the key he had been using against the ignition. The blade read fine on my decoder. Then I plugged into the OBD port and looked at what the vehicle security system was actually reporting. The transponder in his key had lost its enrollment, which sometimes happens after a low-voltage event or a battery disconnect. The car did not recognize the key anymore, so it was refusing to fire.

I ran the relearn procedure through my scan tool, walked through the security timer, and verified the immobilizer accepted the key. Cranked right up.

He walked out after his one o'clock patient and the car was sitting there running fine. No tow, no appointment, no waiting. He mentioned the dealer had quoted him a tow plus a multi-day turnaround the last time something like this came up on a different vehicle. This took about forty minutes in his own parking lot.

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