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Old 09-12-2016, 06:41 PM   #1
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Questions regarding keyfob battery


My 02 boxster s' keyfob appears to be working intermittently when locking/unlocking the doors or doing anything with the 3 buttons.

the red LED on the keyfob blinks with each keypress, so i think the switches are working fine, but i still have to stand around for about a minute pressing the locking button to unlock/lock the car. 1 of every 20 keypresses actually goes through to the car.

is it the battery going flat? the red led seems to light up fine, but im not sure if its supposed to light up brighter.

I read a bit about replacing the keyfob battery, this is what i've gathered, tell me if i've missed anything prior to replacing the battery to avoid any uneccessary costs of getting the key reprogrammed

-needs a new cr2023 battery
-i have to take out the old one and put in the new one in less than 10 seconds otherwise the key will have to be reprogrammed?
-i "might" have to re sync the battery by unlocking the car manually, putting it in the ingition and position 1, then take it out and lock the car in less than 6 seconds?

is this it?

this seems very complicated, i've never had to do this with any of my previous german cars.


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Old 09-12-2016, 06:52 PM   #2
07 Carrera S Cab
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Join Date: Nov 2005
Location: New Jersey
Posts: 2,273
I swapped a battery out of my keyfob recently, and didn't do it within 10 seconds. I just used the key to manually open/lock the door, and then also pressed the button to lock/unlock the car. Then I started the car and no problems. It didn't seem any different from any other car I've had.
Current: 07 Carrera S Cab in Midnight Blue

Previous: 01 Boxster in Arctic Silver, 86 944 in Guards Red
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Old 09-12-2016, 06:53 PM   #3
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Posts: 2,112
If the battery is the issue, all you need do is to replace it. Double check the battery number.

1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
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