Porsche Cayenne key fob battery
9 of the 24 model years listed for the Porsche Cayenne have a proven battery. The most common answer is CR2032. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2003Unknown
Not confirmed yet
- 2004-2009Key-head remote
Not confirmed yet
- 2010-2017Smart key
CR2032
FCC ID KR55WK50138Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2018-2019Unknown
Not confirmed yet
- 2020Unknown
CR2032
Owner's manual: manualslib.com (checked Nov 1, 2026)
Manual text: “Changing the battery (CR 2032, 3V)”
Find CR2032 on Amazon - 2021-2026Unknown
Not confirmed yet
Changing the battery
Smart key (push-button start)
- Start by freeing the hidden metal key: there is a latch or slide on the case, and the blade comes out once it moves.
- Look inside the empty key slot for a notch. Put the tip of the metal key or a small flat screwdriver wrapped in tape there and twist gently until the shell splits.
- Note which side of the old coin cell faces up (usually the side with the writing), lift it out with a plastic tool, and press the new one in the same way.
- Snap the halves back together, slide the metal key home, and press each button, then try the start button from the driver's seat.
A CR2032 is 20 mm across and 3.2 mm thick. CR2032, CR2025 and CR2016 share the same width but not the same thickness, so a swap between them can leave a loose contact or a case that will not close.
Remote key (form not stated in the source)
- The form of the remote is not named in the source for these years.
- Find the seam and work it open slowly.
- Replace the cell with the same side up, close the case, and test.
A CR2032 is 20 mm across and 3.2 mm thick. CR2032, CR2025 and CR2016 share the same width but not the same thickness, so a swap between them can leave a loose contact or a case that will not close.
Coin cells are a choking and burn hazard for children. Store the spares in their original pack, out of reach.