These instructions apply to the DS 7 Crossback Mk1 (X74) 2017-Present. For other models, please choose your vehicle here.
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A DS 7 Crossback (2017–present) remote that only works up close or has stopped responding almost always just needs a fresh coin cell. It’s a quick swap once you slide the emergency key out. Here’s the job, and why a new key is a dealer matter.
Battery First
The DS 7 Crossback key uses a CR2032 coin cell (check the old one, as some PSA remotes take a CR1620). A weak cell is behind nearly every unreliable-remote complaint, so fit a fresh one before suspecting the car. The fob carries an emergency key blade for the driver’s door if the remote is dead.
Replacing the Fob Battery
- Slide out the emergency key blade to release the case.
- Open the cover with a small screwdriver at the seam.
- Lift out the old CR2032 and fit the new cell the same way round.
- Close the cover, refit the blade, and test lock/unlock.
Lost Key or Adding a Spare
A battery swap keeps the existing coding. A new key must be ordered and coded by a DS dealer through the immobiliser — there’s no owner sequence for a fresh transponder.
If a Fresh Cell Doesn’t Help
- Check the cell size and polarity — the usual reasons a swap doesn’t take.
- Keyless DS 7? Hold the fob against the START button to start the car if the cell is flat.
- Still dead? A receiver or BSI fault can store a code — look it up on autodtcs.com.
Frequently Asked Questions
What battery does the DS 7 Crossback key use?
Usually a CR2032; some remotes use a CR1620 — check the old cell.
Do I need to reprogram the fob afterwards?
No — the coding is retained for a battery change.
Can I program a new key myself?
No — a new key must be coded by a DS dealer because of the immobiliser.
How do I open the fob?
Slide the emergency key blade out first, then prise the cover off with a small screwdriver.
If the remote stopped after a battery disconnection, see our DS 7 Crossback battery disconnect/reconnect guide.
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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