2020 Toyota Tacoma key fob battery
Correct battery depends on your key type
CR2016
Wireless remote key (no smart key system) — Toyota lists a separate procedure for vehicles without a smart key system.
Buy CR2016 on Amazon
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CR2032
Electronic key (smart key system) — Toyota lists a separate procedure for vehicles with a smart key system.
Buy CR2032 on Amazon
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Applies to: United States
This model year has 2 key types with different batteries. Check which key you have before buying — the details for each are below.
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 a smart key system.
- The electronic key holds a mechanical key that you take out first.
Replacement steps (summarised from the manual)
- Take out the mechanical key.
- Remove the cover. Cover the tip of the screwdriver with a rag to avoid damaging the key.
- Remove the depleted battery.
- Insert the new battery with the "+" terminal facing up.
- Reassemble the key, then check that the lock/unlock buttons work.
Key programming: Not stated in the official source.
Official source
Toyota 2020 Tacoma Owner's Manual (OM04025U) — Toyota Motor Sales, U.S.A. (assets.sipb.toyota.com)
2020 model year; publication OM04025U; pp. 443–444, 6-3 Do-it-yourself maintenance › Wireless remote control/electronic key battery › Vehicles with a smart key system. Market coverage: United States. Checked 2026-10-18.
“Lithium battery CR2016 (vehicles without a smart key system), or CR2032 (vehicles with a smart key system)”
Wireless remote key (no smart key system): CR2016
Verified from official source- Battery
- CR2016
- 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 a smart key system.
- Inside this key the battery sits in a module with its own case cover, opened with a coin.
Replacement steps (summarised from the manual)
- Remove the cover. Cover the tip of a flathead screwdriver with a rag to avoid damaging the key.
- Remove the module.
- Open the case cover using a coin protected with tape, and remove the depleted battery.
- Insert the new battery with the "+" terminal facing up.
- Reassemble the key, then check that the lock/unlock buttons work.
Key programming: Not stated in the official source.
Official source
Toyota 2020 Tacoma Owner's Manual (OM04025U) — Toyota Motor Sales, U.S.A. (assets.sipb.toyota.com)
2020 model year; publication OM04025U; pp. 443–444, 6-3 Do-it-yourself maintenance › Wireless remote control/electronic key battery › Vehicles without a smart key system. Market coverage: United States. Checked 2026-10-18.
“Lithium battery CR2016 (vehicles without a smart key system), or CR2032 (vehicles with a smart key system)”
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.