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7 Series DIY
Do It Yourself forum dedicated for 7 Series BMW Owners

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Old 08-30-2010, 02:21 PM
richpu richpu is offline
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Location: uk
 
Join Date: Dec 2008
Posts: 16
Mein Auto: e65 745
DIY - Keyfob repair

Hi All,
I had a problem with my spare keyfob not working. it would open the doors but not lock them. I know that this is a symptom of a flat battery in the fob and you need to put it in the car to charge up.

Well I had it in the car for approx 5 hours and it made no difference.
I thought it must be the battery that's dead. therefore open it up and replace the rechargeable battery...

so here goes.

Cut around the key with a sharp craft knife. (this took about 10-15 mins)


By richpu at 2010-08-30

Once I cut around the keyfob case and opened it up, it became clear why the locking was not working. The switch had come unsoldered.




detail of the rechargeable battery



Re-soldered the switch and tested it and the car locked and unlocked just fine.
so that saved me having a mess around with the battery.

Once I was happy it was working I glued and held it together using cable ties until the glue dried.

Hopes this helps anyone if they have the same issue.

Regards,
RichPu
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