Buick Enclave Avenir key fob battery
Find the coin-cell battery for your Buick Enclave Avenir smart key or remote, by model year and key type. Data covers 2021–2021.
CR2450 2021
Buick Enclave Avenir key fob battery by year
| Key type | 2021 |
|---|---|
| Standard remote / key | CR2450 |
Source: Energizer Key Fob Battery Replacement Guide (©2023, model years 2014–2023), PDF checked 12 November 2026. “—” means the source lists no battery for that year and key type; it does not mean the vehicle has no fob.
How to confirm before you buy
- Open the fob and read the code printed on the old coin cell (e.g. “CR2032”). That printed code beats any chart, including this one.
- Check which kind of fob you have. Many models list a different battery for a smart key (push-button start / keyless entry) than for a remote key (flip or blade key with buttons).
- Match the code exactly. CR2025 and CR2032 have the same diameter but different thickness, so the wrong one can fit loosely or force the case open.
- Insert the new cell with + and − matching the markings, then test lock and unlock before closing up.
If the fob still doesn't work after a new battery
See the troubleshooting checklist (wrong thickness, orientation, bent contacts, a coated cell that doesn't touch the contacts, low-battery warnings that take a few drives to clear). For opening the case, see how to open a key fob without breaking it. If the battery died completely, see how to start a car with a dead key fob.
Common questions
What battery does a Buick Enclave Avenir key fob take?
CR2450 for model years 2021–2021 listed in the Energizer guide.
Do I need to reprogram the Buick Enclave Avenir key fob after changing the battery?
A battery swap normally keeps the fob paired, but check your owner's manual. If the fob stops working after a swap, recheck the battery code, orientation and contacts first.