2004 Buick Century
Key Replacement - Save vs Dealer in San Diego
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2004 Buick Century
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2004 Buick Century Remote Replacement - Fast, Affordable & Professional
When a 2004 Buick Century key is done wrong, it doesn't just "kind of work." It fails. Buick's theft-deterrent system is particular about chip types. On older PK3 models, a wrong transponder triggers a solid security light and the PCM cuts fuel. On newer smart key models, a cheap aftermarket fob might lock and unlock fine but force you to use the backup pocket every time you start.
A set designer at the warehouse district in Encinitas had a key made by another locksmith for his Century that stopped working after about five days. It would start cold, but after driving and shutting off, the next start would fail with a security light. Classic symptom of a transponder that passed the initial learn but fails the deeper verification.
I used my IM608 to read the existing key data, confirmed it was the wrong chip variant, and programmed a new key with the correct transponder. His remote, FCC ID L2C0007T, also had a weak CR2032 battery contributing to intermittent remote failures on top of the chip issue.
The replacement has been working for months and cost him $95. The dealer would have charged $200. On Buick, the chip type matters more than most people realize because the BCM is less forgiving of close matches.
Save vs the Dealer on Your Buick Century Key
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Buick Century Rapid Response, Done Right
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“Steve was incredibly helpful when I lost my car keys. He came out the exact same day and I only waited about 30 minutes. I really needed to get to work and he completely saved me.”
“I am very pleased with the value of the service I received from Marco at EZ Car Keyz. They arrived extremely fast, opened my door in no time, and the price was right on point.”
“I needed a new key for my car and Marco gave me the best quote by far. He showed up, made the new key on the spot, and everything works perfectly. Fast service and great value.”
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