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Old 10-10-2025, 09:06 AM   #1
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Another Key FOB question.....

In my case I have two original (two button) key FOBs for my 98 Boxster. They both have worked very well but both needed to be very close to the car in order to unlock the doors or rear trunk. Often with me standing about 2 ft away from the car.

However, beginning yesterday, BOTH key FOBs aren't locking or unlocking the doors or rear trunk when pressing the buttons on the FOB.. Both have new Duracell batteries in the correct position and BOTH tiny red lights light and flash EXACTLY the same as they have for years.

In other words, both stopped working on the same day.....so my assumption is that the issue is NOT either keys or batteries. That leaves me to believe it MIGHT be the "immobilizer".

Is there a way to tell without pulling the seat and removing the unit?? Could it be a FUSE?, main car battery that's only 3 yrs old. (The car is never in the rain and is always garage kept and never washed just polished and dusted).

Any thoughts?
btw...the door lock button on the dash works fine and the car starts and runs excellent with both key FOBs.

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Old 10-11-2025, 07:55 AM   #2
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nothing??....no thoughts??
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Old 10-14-2025, 02:02 PM   #3
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This "resetting" procedure is off the internet so before I try it....does it make sense?? Will this procedure screw up anything with the key and starting the car........

Everything works fine except both my key fobs w new batteries don't work the door locks.
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Old Yesterday, 01:34 AM   #4
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Resynchronisation procedure Porsche 986 996 980
- Open the driver's door, get into the vehicle and close the driver's door (the passenger door must also be closed).
- Switch on ignition
- Switch off ignition
- Remove the remote control key
- Press the open/close button on the remote control key within 5 seconds (key symbol) and hold for 15 seconds, then release.
- Press the open/close button on the remote control key (key symbol) and hold for approx. 1-2 seconds (i.e. not too short). Try 2-3 times in succession if necessary. Observe a pause of 10 seconds between releases (backlash protection).
- The central locking system should now lock the vehicle (resynchronisation successful)
- Press the open/close button on the remote control key (key symbol) to open the Porsche using the central locking system.

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