2001 Buick Century Key Fob Programming

On the Buick Century and Regal you can program remotes yourself by holding the door's Unlock switch while cycling the key. Reprogram every remote, including working ones.

1. 1Close the vehicle door.
2. 2Turn the ignition to ON then back to OFF (ON is just shy of starting, engine not cranking).
3. 3Remove the key from the ignition.
4. 4Press and hold UNLOCK on the driver's-door switch — keep holding until step 8.
5. 5Insert the key into the ignition (don't turn it) and remove it.
6. 6Insert the key again (don't turn it) and remove it.
7. 7Insert the key a third time (don't turn it) and leave it in.
8. 8Release the Unlock switch. Three chimes confirm you're in programming mode.
9. 9Press and hold LOCK and UNLOCK together on the first remote until the vehicle beeps twice (about 15 seconds).
10. 10Repeat for all remaining remotes, including working ones, then remove the key and test.

Your 2001 Buick Century key fob uses a CR2032 3V lithium coin cell. A fresh one typically lasts 3–5 years.

How to replace the battery

1. 1 Find the seam or small slot on the edge of the remote.
2. 2 Twist a coin or small flathead in the slot to split the case open.
3. 3 Remove the old coin cell and note the + side.
4. 4 Fit the new battery with the + side matching, then close the case.
5. 5 Press a button to confirm the LED lights, then test at the car.