Audi a6 key not recognised

paidi66

Hi guys,
Looking for some help here.

Audi a6 2014 - key not recognised fault

Replaced key battery got new key programmed to no avail, car previously had water damage in boot spare wheel well and replaced mmi unit.

Anyone experienced this? Don’t know where to go with it.
Much appreciated.

mikewest

What brand of battery used in key?

Varta or the Aldi own brand seem to work best in VAG keys in my experience.

has the key been re-synced with car?

paidi66

Appreciate the reply, new Duracell battery gone into old key.

New key only purchased this morning, fully synced to car can see it in initialised keys.

No remote ignition on either have to hold key up to dash.

prawnsambo

Does the key (or keys) lock and unlock the car remotely from a distance? This would eliminate battery issues, so then it may only be the key recognition module.

Has the issue just arisen or does it coincide with the MMI unit being replaced?

paidi66

The key issue came when mmi unit went bust. Key still locks and unlocks etc from distance.

Any advice ?

Kimbot

Have you held the key against the marked area as the message states?

mk7r

Did you ever get the component protection properly sorted? You need to get the car on a good scanner to see where the issue lies.

The Mmi unit is behind the dash not in the boot on a C7 A6 so what was actually water damaged?

paidi66

hi all, yeah I can start car by holding key up to dash just fine, thank you. It was the module under the Bose amp got replaced water trickled in through boot strut area

paidi66

still no luck with component protection also

mk7r

https://www.boards.ie/discussion/comment/123517955#Comment_123517955

BCM2 module? do you still have the old one?

paidi66

No, don’t have old one still. Do I need it?

mk7r

https://www.boards.ie/discussion/comment/123517978#Comment_123517978

Its just useful to identify what was replaced since you aren't sure (It wasn't the mmi module) and to make sure the part numbers are an exact match.

Your best bet is a proper diagnostic session to see what the problems are, if there is component protection active etc and go from there.

paidi66

no worries I booked in with Des Golden specialists in cork. Hoping they can decipher what’s gone wrong. I know it’s literally impossible to advise on this without seeing it haha :)