1997 Audi A4
Key Replacement - Save vs Dealer in Ventura County

1997 Audi A4 Remote Flip Key Replacement - Fast, Affordable & Professional

I was parked near the Wilson neighborhood in Oxnard on a Sunday morning when she found me. Flight attendant, in town on a layover, killed some time at a brunch spot nearby. She had her A4 but not really, because another locksmith had already been paid and the car still wouldn't run right.

She described it the same way every person describes a failed immobilizer enrollment: car cranks, starts, runs for about two seconds, then shuts off like someone pulled a fuse. She assumed it was a module problem because that's what the first tech told her when he left. She had already paid him.

That symptom has one explanation on a 1997 A4. The key data got written temporarily but never confirmed into permanent memory. Audi's immobilizer on this generation uses a timed PIN handshake. Rush it, use the wrong procedure for the generation, or skip a confirmation step, and the car plays along during the session and then forgets the key ever existed the moment you cycle the ignition. The immobilizer doesn't throw a fight. It just quietly wins.

I connected through the OBD port, cleared the incomplete key data from the previous attempt, pulled a fresh PIN, and ran the full enrollment sequence with the correct timing. Both steps, transponder and remote. When she turned the key that time, the engine ran past two seconds. Past five. She let it idle for a while just to be sure.

All four buttons on the fob worked. She texted me from the airport later that evening to say the car started fine at home. The dealer was never part of her plan after what she'd already spent, and she saved a good chunk compared to that route anyway. The job just needed to be done right the first time.

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