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-   -   Replacing Keyless entry door handle sensor (https://forum.a8parts.co.uk/showthread.php?t=12185)

IT 4th October 2016 02:03 PM

Replacing Keyless entry door handle sensor
 
7 Attachment(s)
Like the D3, C6, 4L Q7 and probably others, the keyless entry / lock system seems to fail as a matter of course.

However, Audi have finally recognised this and helped a little by making the electrical parts separate to the cosmetic handle itself.

So, no more painting a whole new handle. Instead, it is now an electrical insert into the original handle, and with a little skill can be swapped in sub 20 mins.

Note, its the same part number (4G8 927 753 B) for all 4 doors, which makes its it even easier. Available from a8parts here:

http://www.ebay.co.uk/itm/Audi-A8-D4...i:131959559641

Firstly, lets assume you've used vagcom to identify the faulty door handle. 9 times out of 10 its the drivers door, as is mine.

Second job, remove the rubber bung that is covering up the screw we need:


http://forum.a8parts.co.uk/attachmen...1&d=1475584580

Under here is a Torx 20. You need to screw it all the way out until it comes to a stop, anti clockwise.

http://forum.a8parts.co.uk/attachmen...1&d=1475584580

Now, this gets a bit more interesting. You have to hold the handle out a little way and push the torx screw in. This pushes a mechanism inside the handle that locks the handle in this position. If you get it wrong and the handle doesn't lock out, use a set of needle nose pliers to pull the torx screw out and try again.

http://forum.a8parts.co.uk/attachmen...1&d=1475584580

At this point, the mechanism that you pushed in to lock the handle ajar, has also released the key part of the handle and it will now come out easily. Take it easy as it has an extension on it for operating the lock:

http://forum.a8parts.co.uk/attachmen...1&d=1475584580

Locking part out:

http://forum.a8parts.co.uk/attachmen...1&d=1475584580

Now, the main part of the handle will slide back a few mm and lift out very easily. Feed it carefully out through the front hole noting its shape in the photos below. Disconnect the two cables carefully and it is free.

http://forum.a8parts.co.uk/attachmen...1&d=1475584580

See below for the inserts. The newer one is visibly cleaner and a different (improved?) design.

http://forum.a8parts.co.uk/attachmen...1&d=1475584580

Unfortunately, my photos dry up here. Getting the insert out is a fairly straightforward case of unclipping the cables (1 for keyless, 1 for handle illumination if fitted) and then carefully removing the plastic insert from around the handle where the cables come out, and the lighting is.

Looking at the photo above, the insert would pull out to the left, pulling the cable through the length of the handle before emerging.

Refitting is very much the reverse:

After inserting the new sensor into the handle, and securing the cables back into place connect the two cables back up and feed it slowly back into the front most hole in the door where it came from. Insert the rear part of the handle in, and slide the whole handle forward a couple of mm again so it is back in place. Remember that it is still locked out ajar so shouldn't sit flush at this stage.

Carefully offer the key lock part of the handle back in, ensuring the locking pin engages. This should be sat flush.

Screw clockwise the Torx 20 bolt back in until it stops. This will secure the keylock and release the main handle to sit flush with the door again.

Test the door lock works before shutting the door, just in case ;)

When all looking good, pop the rubber grommet back on, shut the door and lock it keylessly. Stand back and smile smugly.

Probably worth clearing any error codes in vagcom too, but won't stop it working +++

Johnmed 5th October 2016 11:45 PM

Nice work Ian. Always great to do a job when you've seen how it's been done prior.

My NSR is inoperative (D3) and I just live with it. At least with the D4 the process seems a whole lot simpler and logical.

Joe2.0E 6th October 2016 08:10 PM

Great write up, I'm sure we'll all get to use it at some point if they fail as often as the type fitted to the D3's. The part seems pricey though at £119.

IT 7th October 2016 08:40 AM

Quote:

Originally Posted by Joe2.0E (Post 118211)
The part seems pricey though at £119.

Seems like a bargain to me. For a new D3 handle, painted and fitted you were looking at the best part of £300...... +++

mondie 7th October 2016 04:43 PM

Thanks, this is a fantastic post. Our D4's drivers door sensor has failed too, now I just need to decide if I have the nads to tackle this job myself :)

mondie 4th December 2016 03:08 PM

Anybody know if I can buy one of these OEM sensor replacements and install it myself without needing to reset the ECU?

Thanks Simon

http://www.ebay.co.uk/itm/OEM-Exteri...3D131959559641

http://www.ebay.co.uk/itm/Exterior-D...3D131959559641

Adrian E 4th December 2016 08:51 PM

As long as they're the right part number then no problem - they're clearly straight from the Chinese factory at that price, but if they're all marked up with Audi logos on arrival then almost certainly the same thing minus the box! Plenty of people use them OK.

No coding involved to fit - IT just suggesting clearing any hangover logged faults from a dead sensor

IT 4th December 2016 09:32 PM

In my case, the keyless didn't operate again until I cleared the faults from the memory.

If you replace the handle, there may be a very small chance it might right itself, but its rather unsatisfying to wait on the off chance +++

mondie 9th December 2016 12:01 PM

Thanks for the confirmation, I will go ahead and order one and try my luck.

Cheers

paulrstaylor 3rd January 2017 01:40 PM

How did you get on with this Mondie?

I've ordered two form China last week - not much risk at £9 each but still keeping fingers crossed +++


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