2021 Toyota RAV4 key fob battery
Correct battery — all 2 key types
CR2032
Electronic key (smart key system) · Key with wireless remote (no smart key system) · Applies to: United States
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This model year has 2 key types, and they all use the same battery. You can buy one battery type for any of them.
Electronic key (smart key system): CR2032
Verified from official source- Battery
- CR2032
- Quantity
- 1
- Polarity
- Insert a new battery with the "+" terminal facing up.
- Markets
- United States
How to tell if you have this key
- Toyota lists a separate procedure for vehicles with smart key system.
- The electronic key holds a mechanical key that you remove by releasing a lock.
Key programming: Not stated in the official source.
Official source
Toyota 2021 RAV4 Owner's Manual (OM0R028U) — Toyota Motor Sales, U.S.A. (assets.sipb.toyota.com)
2021 model year; publication OM0R028U; pp. 613–614, 6-3 Do-it-yourself maintenance › Wireless remote control/electronic key battery. Market coverage: United States. Checked 2026-10-18.
“Use a CR2032 lithium battery”
Key with wireless remote (no smart key system): CR2032
Verified from official source- Battery
- CR2032
- Quantity
- 1
- Polarity
- Insert a new battery with the "+" terminal facing up.
- Markets
- United States
How to tell if you have this key
- Toyota lists a separate procedure for vehicles without smart key system.
- The battery sits under a key cover and a separate battery cover.
Key programming: Not stated in the official source.
Official source
Toyota 2021 RAV4 Owner's Manual (OM0R028U) — Toyota Motor Sales, U.S.A. (assets.sipb.toyota.com)
2021 model year; publication OM0R028U; pp. 613–614, 6-3 Do-it-yourself maintenance › Wireless remote control/electronic key battery. Market coverage: United States. Checked 2026-10-18.
“Use a CR2032 lithium battery”
Battery safety
- Keep coin batteries away from children. A swallowed coin cell can cause severe internal burns within hours. If you think a battery has been swallowed or placed in the body, get medical help immediately.
- If the battery compartment does not close securely, stop using the key and keep it away from children.
- Hold the new battery by its edges and avoid touching the circuit board or contacts.
- Replace only with the same type, and recycle the old battery according to local rules.
If the key still doesn't work
- Check the battery orientation and that the cover is fully closed.
- Make sure the new battery is the exact code listed above — similar sizes are not interchangeable.
- If the buttons still do not work, contact a franchised dealer. We do not cover key programming or security systems.