2017 Porsche 911
Key Replacement - Save vs Dealer in Ventura County

2017 Porsche 911 Smart Key Replacement - Fast, Affordable & Professional

I got a call on a Sunday morning from a guy parked near The Collection in Oxnard. Retired airline captain. He'd already been through it once with another locksmith and was not in a great mood when he called me. I didn't blame him.

He'd paid for a replacement smart key for his 2017 Porsche 911 that never actually worked. The car would crank, run for about two seconds, and then die. The other tech told him the keyless entry and start module was bad and walked away. That was the diagnosis. The module.

The module was fine. What happened was a botched write during key programming. Porsche's immobilizer system requires the security data to be calculated correctly and written to the fob in a specific encrypted sequence. If you rush the process, use an outdated tool version, or skip a verification step, the key can look paired on the tool screen but the vehicle never fully accepts it. The engine starts on the first handshake and then cuts fuel when the second check fails. That's what he was seeing.

I connected through the OBD port with my Autel, cleared the incomplete key data from the previous attempt, pulled fresh data from the vehicle's system, computed the correct codes, and wrote a clean file to a new fob. All five buttons came up. Push-to-start worked without any hesitation. No fuel cutoff. I showed him the confirmation screen so there was no ambiguity about whether it took.

The dealer comparison came up briefly. He knew what they charge. He'd already paid one guy who left him with a broken result. What mattered at that point was that the car started and stayed running, and the key he was holding actually worked.

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