Porsche Boxster key fob battery
7 of the 30 model years listed for the Porsche Boxster 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.
- 1997-2004Key-head remote
Not confirmed yet
- 2005-2009Key-head remote
Not confirmed yet
- 2010-2016Smart key
CR2032
FCC ID KR55WK50138Two sites agree: bestkeysupply.com and manualslib.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2017Unknown
Not confirmed yet
- 2018-2024Unknown
Not confirmed yet
- 2025-2026Unknown
Not confirmed yet
Changing the battery
Smart key (push-button start)
- Find the small release on the edge or back of the fob and hold it while you pull out the metal emergency key.
- The gap left by the metal key usually has a pry point. A slow twist with a thin flat tool (tape on the tip saves the plastic) opens the two halves.
- 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.
- Reassemble, refit the emergency key, and check that the car sees the fob when you press start.
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.
Keep spare coin cells away from small children. A swallowed coin cell can burn the throat within hours; if it happens, go to an emergency room at once.