Replacement Key fob

[Bdc101]

Originally Posted by oldskewel

Faults in the system outside of the key can cause the remote entry to not work. So it would be an expensive test to buy a new dealer diamond key and have that not work.

Here are a couple of threads, with relevant info on keyless entry problems and solutions I've used on my 2001.

First one is how I got used diamond keys off eBay for $15 each and use them as key fobs, paired with genuine valet keys bought from thebmwminipartstore.com
https://xoutpost.com/bmw-sav-forums/...ml#post1079644

This one is how I replaced the rechargeable batteries in two of my fobs once they became weak. Extensive testing on charging solutions.
https://xoutpost.com/bmw-sav-forums/...r-options.html

@Qsilver7 has great posts on here somewhere with exact instructions on the programming of the fobs. Unfortunately, the entire system can be perfect and a simple mistake in the programming procedure will simply fail without letting you know why.

My system has become completely unresponsive -- none of the re-pairing works on either of my fobs. I had to repair a broken wire going to the third brake light, so I am going to get out the multimeter and test all the wires going to the FZV next. The FZV can't be read by my Foxwell or my PA Soft so I don't think there's any way to tell if it's working unfortunately. I called the guy at BMWGM5 (Scott) and he said to verify all those wires first. I just need to find a pinout first.


I have an inkling that my 20-year-old fob batteries are dead (one never worked and one worked sporadically for the first 5 years of ownership) and that my FZV is also not working.