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Toyota Mirai key fob battery

Find the coin-cell battery for your Toyota Mirai smart key or remote, by model year and key type. Data covers 2016–2020.

Toyota Mirai key fobs (2016–2020) take a CR2032 battery.
CR2032 2016–2020

Toyota Mirai key fob battery by year

Key type20162017201820192020
Standard remote / keyCR2032CR2032CR2032CR2032CR2032

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.

How to confirm before you buy

  1. 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.
  2. 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).
  3. 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.
  4. 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.

Coin cells are dangerous if swallowed. Keep new and used batteries away from children. Energizer warns that swallowing can cause serious injury or death in as little as 2 hours; if a battery may have been swallowed, get medical help immediately (US National Battery Ingestion Hotline 800-498-8666, as listed by Energizer).

Common questions

What battery does a Toyota Mirai key fob take?

CR2032 for model years 2016–2020 listed in the Energizer guide.

Do I need to reprogram the Toyota Mirai 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.

Other Toyota models

All Toyota key fob batteries →