These instructions apply to the Honda CR-V Mk5 (RW/RT) 2018-2023. For other models, please choose your vehicle here.
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If the remote on your Honda CR-V Mk5 (RW/RT, 2018–2023) is getting weak — short range, fussy keyless entry, or a “key battery low” message — the coin cell needs renewing. The CR-V key takes either a CR2032 or a CR1620 depending on the fob, so check the old cell before you buy.
Which Cell Your Key Takes
Open the fob and read the marking on the old cell: it’s usually a CR2032 on the keyless smart key, or a CR1620 on some remotes. Match exactly what comes out.
How to Replace the CR-V Mk5 Key Battery
- Slide out the emergency key — push the release latch and withdraw it.
- Use the slot the key leaves (or a small screwdriver in the seam) to split the case and remove the cover.
- Lift out the old cell, noting its type (CR2032 / CR1620) and which way up it sits.
- Fit the matching new cell the same way, by the edges.
- Click the case together and slide the emergency key home.
- Test lock/unlock and keyless entry from a normal distance.
Does It Need Programming?
No — the swap doesn’t affect the key’s pairing, so it works straight away. A lost or extra smart key can only be ordered and coded by a Honda dealer.
If It Still Won’t Respond
Re-open the fob, confirm you fitted the right cell type the correct way up, and clean the contacts. If keyless entry is slow, hold the fob against the start button to start, then it re-syncs.
Frequently Asked Questions
What battery does the Honda CR-V Mk5 key take?
Either a CR2032 or a CR1620 depending on the fob — check the old cell.
Will the car start with a flat key battery?
Yes — hold the smart key against the start button to start on the backup transponder; the emergency key unlocks the driver’s door.
Which way up does the cell go?
Match the orientation of the cell you removed.
Can I program a spare key myself?
No — Honda key coding needs the dealer system. Only the battery swap is DIY.
To clear a service reminder after maintenance, see our CR-V Mk5 service reset guide. For warning lights, look up the code on autodtcs.com.
Disclaimer: The information on this page is provided for general guidance only. Always follow your official service manual and safety precautions when working on your vehicle. We are not responsible for errors, omissions, or any damage resulting from the use of this information.
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