Wireless Charging OEM Retrofit - Help

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q2us3r
Posts: 9
Joined: Thu Apr 25, 2019 3:09 pm

Wireless Charging OEM Retrofit - Help

Post by q2us3r » Sun Mar 14, 2021 11:19 pm

Hi all,

Bought my new Audi Q2 SLine in 2018 which I have been loving ever since, however, I really regret not choosing the technology pack which included wireless charging in the armrest.

So I started to gather all the information I could about adding this myself and at least on paper it looks like a fairly straightforward retrofit - I am not scared to tinker and have performed retrofits on my previous car (Audi A3).

So the charging module is part number 81A035502, and the new armrest container I think it's 81A863300A (it's this the same for LHD and RHD? - I am getting conflicting information from sellers). Any ideas on:

1. How to remove the old armrest container?
2. Is the new armrest container different for LHD and RHD?
3. Wirring instructions? part number for the cable harness?
4. VCDS coding?

Once completed I would be very happy to post a detailed how-to guide with photos so to help others in the future.

Any little/big help would be gratefully received!

Thanks.

IanQ2
Posts: 189
Joined: Thu Feb 16, 2017 4:58 pm

Re: Wireless Charging OEM Retrofit - Help

Post by IanQ2 » Tue Mar 16, 2021 10:46 am

I can answer some queries

If you have access to ETKA i have noted the diagrams the parts are in for you (in brackets below))

1. The container is attached from underneath with a single torx at the front edge, the rear locates via tabs. You need to remove the centre console to change. (863-050)
2. The container isn't sided. Part number for the charge module is 81A 035 502 (035-055)
3. Cant locate the harness set on ETKA as I think its in a specific section that I don't have access to on mine, the electronic connecting elements. If anything I would assume it gets its power source off the USB distributor block (part no 5G0035953D on diagram 035-038) assuming you have this already.
4. No idea on coding or if its even needed as its just likely to be a live and an earth as it has no function other than to charge. I have asked a friend who has retrofitted to his 8P RS3 on what's needed.

IanQ2
Posts: 189
Joined: Thu Feb 16, 2017 4:58 pm

Re: Wireless Charging OEM Retrofit - Help

Post by IanQ2 » Tue Mar 16, 2021 10:51 am

Quick google search on the A3 (which will be fairly similar suggests it could be a fair bit to swap over if you don't have certain stuff already.

https://www.audi-sport.net/xf/threads/a ... ng.365068/

testcard
Posts: 71
Joined: Tue Oct 23, 2018 7:59 pm
Location: Northumberland

Re: Wireless Charging OEM Retrofit - Help

Post by testcard » Tue Mar 16, 2021 1:49 pm

Couldn't you simply connect a wireless charging pad to the existing armrest?
2019 Audi Q2 S line, 35 TFSI. Daytona grey.

q2us3r
Posts: 9
Joined: Thu Apr 25, 2019 3:09 pm

Re: Wireless Charging OEM Retrofit - Help

Post by q2us3r » Wed Mar 17, 2021 6:09 pm

@IanQ2 Many thanks for the information, it has proved very useful! So I have put everything I found together and this is what I have so far:

Wireless Charging + Amplifier Module - 81A 035 502
Armrest Container - 81A 863 300 A (or 81A 863 300), the "A" version is a slightly upgraded version with indentations on the sides so to make it easier to pick up the phone when laid flat.

All the Audi Q2's have the required modules to make this work, so should be a "plug and play" retrofit. Though if you also want to make the signal amplifier work you will need to install the 2-Way Signal Amplifier module (4M0 035 456 A) and connect it to power and to the the back of wireless charger.

So the wireless charger has six pins (a wiring harness can be bought from eBay or Aliexpress quite cheaply) - two pins connect to power, two to the back of the MMI, one to the BCM (Body Control Unit) and one is unused.

Pin 1 to permanent live in your fuse box (like for example in location F39)
Pin 4 to ground.
Pin 2 to pin 5 (grey connector) at the back of the MMI
Pin 3 to pin 11 (grey connector) at the back of the MMI
Pin 5 to pin 14 (C connector) of the BCM

Though people claim that it works perfectly without having to connect Pin 5 to the BCM (making the job simpler) - though I wonder what this module and pin does?

Once all connected, turn on wireless charging in VCDS in module 5F.

And that's it - I think the hardest part will be to route the cables from the phone box (in the underarm rest) all through the central console, behind the dash and left behind the MMI (and fuse box which is located just next to it).

@testcard I have that already but looking for a more elegant solution - the OEM wireless charger also has an inbuilt signal amplifier, and displays notices on the MMI on the charging status of the phone including a warning to not forget the phone when you turn the engine off.
Last edited by q2us3r on Thu Mar 18, 2021 2:50 pm, edited 1 time in total.

testcard
Posts: 71
Joined: Tue Oct 23, 2018 7:59 pm
Location: Northumberland

Re: Wireless Charging OEM Retrofit - Help

Post by testcard » Wed Mar 17, 2021 6:11 pm

Fair enough - good luck with the mod!
2019 Audi Q2 S line, 35 TFSI. Daytona grey.

IanQ2
Posts: 189
Joined: Thu Feb 16, 2017 4:58 pm

Re: Wireless Charging OEM Retrofit - Help

Post by IanQ2 » Wed Mar 17, 2021 9:28 pm

Running the wires wont be an issue IMO, there is more than enough space between the fuse box and glovebox. I have ran a few wires there for my air ride, active exhaust and all of the wires I needed for my R8 wheel conversion control unit

q2us3r
Posts: 9
Joined: Thu Apr 25, 2019 3:09 pm

Re: Wireless Charging OEM Retrofit - Help

Post by q2us3r » Thu Mar 18, 2021 5:45 pm

@IanQ2 many thanks - I have just ordered all the parts so will update once I get it all installed.

q2us3r
Posts: 9
Joined: Thu Apr 25, 2019 3:09 pm

Re: Wireless Charging OEM Retrofit - Help

Post by q2us3r » Mon Apr 19, 2021 5:05 pm

Finally managed to get this done in the weekend and all is working perfectly with information displayed in the MMI when you place the phone in the phone container and both MMI and audio warnings about not forgetting to take your phone with you if you turn off the ignition.

So to add to the notes in my first post, all part numbers and pin diagrams worked just fine. To install you need to remove the whole center console which was a bit of a pain but after that it was straight forward including routing the cables to behind the MMI without having to remove the glove compartment. So to remove the center console:
1. From the back seats remove the air vent panel (just pull it out with your hands).
2. Remove four horizontal and four vertical screws and the whole armrest should come off.
3. To the front of the car, near the pedals their is a little tab that you can pull off with a screwdriver and there is another bolt to take off there, and same on the other side.
4. Remove trim where there cigarette lighter is in (and a USB port in some models) - it just pulls off, work around the edges until you can pull it off. Once off disconnect the USB port, the cigarette lighter we will disconnect in step 6. There is another screw to remove hidden behind this panel.
5. Remove the middle of the center console where you have all the MMI controls (video on how to do this -> www.youtube.com/watch?v=O3I8zfydK1g) - unplug all connections, there should be three at the back and two at the front.
6. Once removed you will see the cigarette lighter plug at the bottom which you can unplug to complete release the trim from step 4.
7. Also from here you can also remove the two cables going into your original armrest container (normally audio out and an USB port)
7. Finally remove the last four vertical screws holding the center console in place.
8. And that it's, if you pull the center console up from the back you should have enough room to access the original armrest container and replace with the new phone box (it's held with two screws).
9. Fit new container, route the cables to behind the MMI and put the center console back in place - the rest is just connecting it to the MMI, to live 12V/Earth, and VCDS coding to turn it on.

In the months ahead I am hoping to add a reverse camera, puddle lights, folding mirrors, and maybe electric tailgate - nearly hard to believe that these did not come as standard in a S-Line 2018 model!

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