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Buick Century Key Fob Programming

Updated 2026 2001–2005 5 model years

Programming steps, the battery it takes, and the exact replacement fob for every Buick Century model year we cover (2001–2005). Find your year in the table, then jump to the details for that generation.

Shop Buick Century key fobs on Amazon Match the FCC ID for your year (table below) before you buy.

Every Buick Century model year

Key fob programming method, fob type and battery for each Buick Century model year
Year Programming Key fob Battery
2005 Remote, Transponder Key · 4-button CR2032 battery on Amazon
2004 Remote, Transponder Key · 4-button CR2032 battery on Amazon
2003 Remote, Transponder Key · 4-button CR2032 battery on Amazon
2002 Remote, Transponder Key · 4-button CR2032 battery on Amazon
2001 Remote, Transponder Key · 4-button CR2032 battery on Amazon

2001–2005 Buick Century

Remote / 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.

Full steps: Buick Century and Regal Remote Programming

Key programming

This key fob can't be programmed with a do-it-yourself procedure. The vehicle needs a diagnostic tool connected to its OBD port to pair a new fob, so a replacement has to be set up by an automotive locksmith or a dealer.

Order the correct replacement fob below — match the FCC ID on your current fob first — then have a local automotive locksmith or the dealer program it to your vehicle.

Replacement key fobs

Find your key type below, then match the FCC ID printed on the back of your existing fob — or, for a plain transponder key, the blank code — to be sure of the right part.

Remote

A separate key fob that only handles locking and unlocking.

2001–2005 Buick Century 4-button Remote, FCC ID L2C0007T
4-button Remote
Find on Amazon
FCC ID
L2C0007T
OE part #
10335582, 10335582-88, 10335588, 9364556-4575, 9364558, 9364560
Frequency
315 MHz

Transponder Key

A cut metal key with a chip in the head. No buttons.

2001–2005 Buick Century Transponder Key, key blank GMB85
Transponder Key
Find on Amazon
Key blank
GMB85
OE part #
322177, GM-41, GM41, S1105

Photos show the OEM part for each number listed. Aftermarket replacements sold online are often slightly different in appearance — the FCC ID, not the shape, is what determines whether a fob will work with your car.

Buick Century key fob battery

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

Buy Energizer CR2032 Lithium Coin Batteries (4-pack) on Amazon

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.

Battery tips

  • Use a fresh, name-brand 3V lithium cell — bargain cells drain quickly.
  • Try not to touch both faces of the new battery; skin oils shorten its life.
  • If the remote still doesn't work after a new battery, it may need re-syncing or programming.

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