C6 2007 - MMI dead

**milbo1990** · 09-03-2022,03:53 PM

Hi all,

New here, so please be gentle!

For the first time in my life, I’ve bought an Audi - so I’ve got lots to learn

I’ve bought a 2007 C6 Avant with a dead MMI. There appears to be water in the tailgate, and I did read somewhere (before I purchased) that a common fault is for the rear washer to leak and take out the MMI - so I’m hoping that’s the problem!

The screen inside is completely dead and the buttons on the console are non-responsive. Other dashboard controls are functional, so I think the issue is solely with the MMI.

Can anyone help me out with the location of the MMI module and how I can go about testing/replacing?

Thanks in advance!

**Crasher** · 09-03-2022,05:24 PM

The front information display and operating unit control unit -J523- is behind the glovebox, it is powered from fuse 10 in the left side dash fuse board

**milbo1990** · 09-03-2022,08:33 PM

Ok, so likely not related to the washer fluid leak in the tailgate?

**Scott K** · 10-03-2022,01:38 PM

Water in the tailgate is usually a pipe connection. Take off the trim and you should see the issue.

**milbo1990** · 12-03-2022,01:05 PM

Ok, I’ve followed this guide (Audi: MMI Problems Diagnostic | Audiworld) and can’t pin point the issue down to any single module.

The guide ends by saying that the fault is likely the ‘main MMI module’ but it doesn’t explain where this is. Can anyone help? I’m assuming it’s behind the glovebox, but there’s a few modules back there and none of them (apart from the little black Temic one) appear to habe fibre going to them. I just want to get it off so that I can retrieve the part number.

**milbo1990** · 12-03-2022,01:06 PM

Also, would VCDS help pin point the cause of the problem?

**Crasher** · 13-03-2022,11:08 AM

Yes it is behind the glovebox, have you checked the fuse? I have seen the radio unit in the boot get wet and blow the fuse but I would have to check the specific diagram against your VIN as there are variations due to date and equipment

**milbo1990** · 13-03-2022,01:01 PM

Thanks for your reply. Yes, I’ve checked all the fuses in the passenger side of the dash and the boot and I’ve checked that all of the modules are recieving power, except for the control panel - so that’s my next step. I can’t actually find a radio module with a fuse in the back of it anywhere. I’ve checked in the boot sides, behind the dash and under the seats. Anywhere else??