Use the documented transmitter sequence when storing a spare key; its buttons remain usable even though passive entry and pocket-key starting are suspended.
Check that your vehicle has it.
Verified for the factory transmitter in the 2025 U.S. CX-50 manual and scoped here only to the cataloged gasoline lineup, not CX-50 Hybrid variants.
- Retail trim / version
- 2.5 S Select, 2.5 S Preferred, 2.5 S Premium, 2.5 Turbo Meridian Edition, 2.5 Turbo Premium, 2.5 Turbo Premium Plus
Does the documented scope match your car?
This check combines the verified year, any source-supported powertrain scope, source-named trim/package and required equipment. It does not read a VIN or factory build record.
Published availability and qualifications
Verified for the factory transmitter in the 2025 U.S. CX-50 manual and scoped here only to the cataloged gasoline lineup, not CX-50 Hybrid variants.
Know what kind of control to look for.
This original category diagram is an orientation aid, not a picture of your exact trim. Use the written labels and your vehicle manual to identify the real control.
Step by step.
- 01
Press Lock on the factory transmitter four times within three seconds.
- 02
Confirm that the key operation indicator illuminates.
- 03
While it is illuminated, hold Lock for at least two seconds.
- 04
Wait for one hazard-light and warning-sound acknowledgement of power-saving mode.
- 05
Repeat the identical sequence to turn the mode off before resuming passive use.
Important limits
- The physical transmitter buttons continue to operate, but advanced passive entry and starting with the key in a pocket or bag are disabled.
- The operation indicator stays dark while the key is in power-saving mode.
- A weak key battery still requires replacement; this setting cannot revive a depleted battery.
Quick checks.
- ✓If there is no acknowledgement, repeat all four presses within three seconds and start the hold while the indicator is on.
- ✓If passive entry still works, the sequence did not toggle and should be repeated from the beginning.
- ✓If push-button start does not detect the key after storage, turn this mode off first.
What happened on your vehicle?
Your response is stored on this device. If you separately allow analytics, a non-account-linked guide/result event may also be measured. No VIN or personal information is requested.
2025 Mazda CX-50 Digital Owner's Manual — Key Power-Saving Function
Relevant section or page: Key — Convenient Ways to Use the Key. We use the written official source to determine the steps and applicability shown above.
Reviewed with a visible trail.
Scope and steps were checked by Car Cheat Codes Editorial Review. A guide is narrowed or corrected when the source does not support a broader claim.
- Published
- Last modified
- Source checked
Guide change history
- Initial verified publication.