X5 e53: can unlock with central lock button but not with remote

[shevin]

I have 2003 X5 E53, and I can not lock/unlock ANY of doors with remote.
In fact none of the remote buttons work (not even the trunk button) funny thing is this happened a couple months ago and it started working again magically for a couple weeks and now it has been not working for good again.

But I can lock-unlock everything with the Central Lock Button inside the car (and I can hear the luck actuator motors).

One theory is maybe the remote battery is dead (the remote is 6 years old) but what makes me think it is NOT the remote is the fault codes:

“Authofix Scanner” shows two relevant fault codes:

- “5A Central-locking driver driver’s door, interrupted”
- “5A Central-locking driver passenger’s door, interrupted”



Another experiment I did is, I tried to Re-Pair the remote key (turning ignition switch 3 times and then holding unlock button while pressing lock button 3 times) and when I do that I hear a VERY VERY VERY small Tick under the glove box.
(In past when I paired a remote it would lock-unlock the doors after, but this time it didn’t do that)

So I have a feeling it might not be remote battery….
Could it be a Fuse? I checked one of the Fuses under glovebox and it didn’t seem broken. What are the relevant fuses in this case?


Another thing I have tried is, I put my remote key on a tooth brush wireless charger overnight (some people claim that charges your battery)

What do you experts think ?