2022 Toyota Corolla 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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Other cars that use CR2032

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

  • Your Corolla has a push-button engine switch and starts while the electronic key is inside the car (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.

Toyota's 2022 Corolla manual lists only CR2032. The 2023 Corolla manuals list CR2450 for smart-key vehicles, so the 2023 answer must not be applied to a 2022 car.

Official source
Toyota 2022 Corolla Owner's Manual (OM02617U) — Toyota Motor Sales, U.S.A. (assets.sipb.toyota.com)
2022 model year; publication OM02617U; pp. 482–484 (Wireless remote control/electronic key battery). Market coverage: United States. Checked 2026-10-18. Archived copy of the same manufacturer file (Internet Archive, for access only).
“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

  • Your Corolla starts by inserting the key into the engine (ignition) switch.
  • The key itself has remote lock/unlock buttons (Toyota calls it a key with a wireless remote control function).

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.

Toyota's 2022 Corolla manual lists only CR2032. The 2023 Corolla manuals list CR2450 for smart-key vehicles, so the 2023 answer must not be applied to a 2022 car.

Official source
Toyota 2022 Corolla Owner's Manual (OM02617U) — Toyota Motor Sales, U.S.A. (assets.sipb.toyota.com)
2022 model year; publication OM02617U; pp. 482–484 (Wireless remote control/electronic key battery). Market coverage: United States. Checked 2026-10-18. Archived copy of the same manufacturer file (Internet Archive, for access only).
“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.

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