2025 Toyota Corolla key fob battery

Correct battery depends on your key type
CR2032
Key with wireless remote (no smart key system) — Toyota lists a separate procedure for vehicles without a smart key system.
Buy CR2032 on Amazon

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Other cars that use CR2032

CR2450
Electronic key (smart key system) — Toyota lists a separate procedure for vehicles with a smart key system.
Buy CR2450 on Amazon

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Other cars that use CR2450

Applies to: United States, Canada

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): CR2450

Verified from official source
Battery
CR2450
Quantity
1
Polarity
Insert a new battery with the "+" terminal facing up.
Markets
United States, Canada

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 remove by releasing a lock.

Replacement steps (summarised from the manual)

  1. Release the lock and remove the mechanical key.
  2. Remove the key cover. Cover the tip of a flathead screwdriver with a rag to avoid damaging the key.
  3. Remove the depleted battery using a small flathead screwdriver. If the electronic key module sticks to the cover, remove the module to reach the battery.
  4. Insert the new battery with the "+" terminal facing up.
  5. Refit the key cover and mechanical key in reverse order, then check that the lock/unlock buttons work.

Key programming: Not stated in the official source.

Official source
Toyota 2025 Corolla Owner's Manual USA and Canada Only (OM02688U) — Toyota Motor Sales, U.S.A. (assets.sipb.toyota.com)
2025 model year; publication OM02688U; pp. 327, 329, 6-3 Do-it-yourself maintenance › Wireless remote control/electronic key battery. Market coverage: United States, Canada. Checked 2026-10-18.
“Use a CR2032 (vehicles without a smart key system), or CR2450 (vehicles with a smart key system) 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, Canada

How to tell if you have this key

  • Toyota lists a separate procedure for vehicles without a smart key system.
  • The battery sits under a key cover and a separate battery cover.

Replacement steps (summarised from the manual)

  1. Remove the key cover. Cover the tip of a flathead screwdriver with a rag to avoid damaging the key.
  2. Remove the battery cover (lift the edge if it is difficult to remove).
  3. Remove the depleted battery using a small flathead screwdriver.
  4. Insert the new battery with the "+" terminal facing up.
  5. Install the battery cover with the tab facing up, pushing the entire edge into the key.
  6. Install the key cover, pressing it straight in so there are no gaps, then check that the lock/unlock buttons work.

Key programming: Not stated in the official source.

Official source
Toyota 2025 Corolla Owner's Manual USA and Canada Only (OM02688U) — Toyota Motor Sales, U.S.A. (assets.sipb.toyota.com)
2025 model year; publication OM02688U; pp. 327–328, 6-3 Do-it-yourself maintenance › Wireless remote control/electronic key battery. Market coverage: United States, Canada. Checked 2026-10-18.
“Use a CR2032 (vehicles without a smart key system), or CR2450 (vehicles with a smart key system) 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.

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