[dest]

I've seen this issue appear in the past, but thankfully it never happened to mine until now

Both remotes don't work
Key unlocks the doors and central locking works
All doors lock/unlock

Basically, everything is working correct apart from the remote unlocking the doors.
Ive seen other people have problems with lock actuators, but I've checked mine and all doors are locking/unlocking correctly.

I've removed the spoiler and done a visual check of the diversity amp, it and everything around it is all bone dry.

I've seen people mention fuses blowing, but that only seems to be if an actuator is sticking or the central locking isn't working and it only opens the drivers door.

I don't really want to spend £100+ on a new diversity amp just yet, is there anything else I can check?

I've also seen people mention the wiring loom that goes to the tailgate, but assume the only way to access it is to cut into the rubber boot, which I'm not really wanting to do incase it isn't that!

Any ideas?

[wallsmk2]

Sorry to say, but I think the first thing to check is the loom. I think you can remove the boot from both ends and check continuity of each wire. I had the loom replaced under warranty for the same issues you are having.

[P14kle]

Defo wires snapped in right hand side wiring harness.
Slice down it with a sharp knife. Repair wires, and tape up with black insulation tape.

Good as new...

[Icekube]

i had this issue on mine, and it was the diversity amp.

have you removed and opened up the amp (its just plastic clips)?

mine looked fine from the outside, but when i opened it up, you could see watermarks all over the board.

[dest]

Yep, I've checked the wiring in the rubber boots and all looks fine. The inside of the amp is bone dry too.
I bit the bullet and got an amp from a 2014 car which should be here today.
Tomorrow morning I'll hupe the new amp sorts it!

[dest]

New amp fitted and working again!

[Icekube]

happy days!

[Jacktremain]

2010 318i e90
So I only have 1 key for my car and sometimes it locks and unlocks but most times it doesn't. The only way I can get in the car is by using the actual key in the door handle but when I open the door the alarm goes off so I have to put the key in the ignition to stop the alarm from going off , is this a result of my battery being old and not efficient enough as my stop start don't work either , it's the original battery