Sid2020

If it’s second hand then they have component protection on them as tried several years ago to use a second hand one. I think the only Real option is either get a garage to remove component protection and recode it or new from Audi and code it in. Ain’t sure about a individual fuse for multi function wheel

I would suspect that Audi sold them as an accessory kit so wouldn’t have individual parts numbers and sometimes are not available for long. Have you looked into getting your existing trims carbon hydro dipped as the results are very impressive

Steering angle sensor usually comes as a complete unit with the storks and the multi function steering wheel and airbag plug into it. Has the correct part number been fitted as quite a lot or variables. Has the coding been done correct. Have they crushed the loom inside the steering wheel when reinstalling the airbag. Anyone that replaces this without disconnecting the battery shouldn’t be allowed near a car and are lucky not to be picking there teeth out of the airbag.

These are from a A1 1.4 tfsi that I did a few weeks ago so if any of it looks familiar then this is what you may also have

I believe what I’m seeing is the combined water pump and thermostat but hard to tell from the picture. The crud could also be from a additive that someone has added to seal a leak

Are they the only 2 faults on your whole car when you run a full scan

Disconnecting the battery resets the cars computers so it may have been deactivated in the mmi. It may be a case of having to climb under the rear bumper and removing the fixings so you can pull it down and access the sensors and control module for the comfort opening, check for corrosion in the plugs and wiring and any visual damage Incase it’s had a rear end shunt at some point. I see the photo of the fault codes had a live data section, this could prove handy while checking the connections

Sounds like a motorized flap may be jammed/broke on the heater box. When you say the matrix was changed I presume just the radiator not the complete heater box

Try locking your car and waiting a few minutes and without your keys go out and see if you can open your tailgate. Just Incase the module isn’t powering down or your key is in range overnight. Always worth ruling out the simple and random things

That explains the 2 fault codes. Do they come back if cleared now it’s working. Trying to think of how that sensor or controller would trigger your alarm or what to try to find out. Unplugging it is one way, is there an option in Mimi to deactivate it.

Your first post says you’ve had this problem since you’ve owned the car so maybe you do have it and it’s never worked and that’s the fault, the sensor wires are usualy on the underside of the rear bumper spoiler fixed into location brackets

Do you have comfort access where you can wave your foot under your rear bumper as the fault codes your getting are not what I would expect to see for a glass sensor

I would try disconnecting the blue wire plug and using a small length of wire with the ends stripped off or a unfolded paper clip to make a jumper wire for the plug on the tailgate loom and see how you get on, clear the faults and see if they come back

The sensor in the lock mechanism should display on the dash if it didn’t work. Also your interior boot lights would remand lit for a few minutes even when car is locked if your boot didn’t detect it was shut. Had that fault myself

May be wrong with this but if you pull your rear panel trim up and off there is possibly a wire that goes to a micro switch that detects the spring loaded plastics flap position, check this is working correctly and activating the switch as easily broken. I know q5 and q7 use this to switch tailgate lights to bumper lights when open and maybe the b9 uses it for another reason