2007 Acura TL
Key Replacement - Save vs Dealer in Ventura County

2007 Acura TL Remote Head Key Replacement - Fast, Affordable & Professional

A grad student at her apartment near Ventura Promenade called me about her 2007 TL. Another locksmith had cut and programmed a key for it about a week before. It worked fine the first few days. Then it started acting up: the engine would crank in the morning but not catch, the green key light on the dash would flicker, and by evening the immobilizer indicator would stay solid green and refuse to start altogether.

She thought the car had an electrical problem. It didn't.

I pulled the key apart on her kitchen counter. The previous tech had used a generic ID46 transponder clone that was close but not spec. The 2007 TL with FCC ID OUCG8D-439H-A needs a Honda/Acura-specific 13.56 MHz chip paired through the HISS system. A near-match can fool the initial registration handshake but fail once the PCM runs its deeper rolling verification over a few drive cycles. That is exactly what happened.

I read the PCM with my VVDI2 through the OBD-II port, confirmed the mismatch, and programmed a new remote head key with the correct chip locked to her VIN. Her old fob also had a weak CR1616 making the remote range drop to about two feet, so I swapped that too.

She watched the dash the whole first start, waiting for the green key light to misbehave. It didn't. The difference between a key that works for a week and a key that works for years is the chip generation inside it.

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