2017–2025 Mazda CX-5 Key Fob Battery Type and Replacement

Which Mazda CX-5 model years does this cover?

These key fob battery specifications apply to every Mazda CX-5 built from 2017 through 2025 — the KF (2nd generation), compact suv. Nothing in this specification changes between those model years. Pick your year for the engines it offered, what changed that year, and the problems recorded against it.

What changed during the 2017–2025 Mazda CX-5

• 2017All-new KF generation on a stiffer platform; 2.0L dropped from the US lineup, 2.5L becomes the sole gas engine
• 2018Cylinder deactivation added to the 2.5L; g-Vectoring Control standard
• 20192.5L Turbo and 2.2L SkyActiv-D diesel both introduced (diesel on Signature trim only)
• 2020Diesel discontinued after this model year due to low take rate
• 2022Mid-cycle refresh: revised front/rear styling, wheel designs, and more standard driver-assist tech; mechanical specs carry over
• 2024Trim names simplified (2.5 S, 2.5 S Select, 2.5 S Preferred, 2.5 Turbo, etc.); final CX-5 model year before the 2026 all-new third generation

What battery does the 2017–2025 Mazda CX-5 key fob take?

A single CR2032 coin cell.

Can you use a CR2032 instead of a CR2025 in a 2017–2025 Mazda CX-5 key fob?

This fob takes a CR2032, so start there. The two cells share a 20 mm diameter but differ in thickness, and the thicker one does not always seat in a housing built for the thinner.

How do you open a 2017–2025 Mazda CX-5 key fob?

Slide out the mechanical emergency key first, which usually releases a catch, then part the halves with a plastic pry tool or a coin wrapped in tape. A screwdriver will mark the case and can crack the seam.