Subaru WRX key fob battery
Find the coin-cell battery for your Subaru WRX smart key or remote, by model year and key type. Data covers 2015–2022.
CR1620 2015–2022 · CR2032 2016–2021
Subaru WRX key fob battery by year
| Key type | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 |
|---|---|---|---|---|---|---|---|---|
| Standard remote / key | CR1620 | CR1620 | CR1620 | CR1620 | CR1620 | CR1620 | CR1620 | CR1620 |
| Smart Key | — | CR2032 | CR2032 | CR2032 | CR2032 | CR2032 | CR2032 | — |
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.
Which key type do I have?
Smart key / smart entry / intelligent access: you can unlock and start the car with the fob in your pocket (push-button start). Remote key: a key blade or flip key with lock/unlock buttons. Where the guide lists other variants (for example by FCC ID), the FCC ID is printed on the back of the fob or inside the case.
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 Subaru WRX key fob take?
It depends on year and key type: CR1620, CR2032. See the year table.
Do I need to reprogram the Subaru WRX 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.