Replacement Audi A4 steering wheel with Audi A8 steering wheel

[dragos90]

Hi, I would like to put an Audi A8 4E steering wheel (picture 1) instead of my Audi A4 B8 steering wheel (picture 2) on my Audi A4 B8 and I get hit by a problem, I at Audi A4 B8 have the function of Lane Assist (when I step on the center line of the road my steering wheel vibrates) I can somehow adapt this vibration motor to the Audi A8 steering wheel, in the multifunction buttons on the Audi A8 I have no connector to connect the vibration motor, do you know where I could pull threads for this function?

Thank you very much :)

Picture 1 (A8)

89157765_3907178505966928_1035779535783591936_o.jpg

Picture 2 (A4)

8464514_volan-cu-airbag-si-comenzi-audi-a4-b8-20-tdi-cag-sedan-2009_10.jpg

[Das Ponto]

Why the A8 wheel?

An S4 one would look much better! And it's a straight swap. All the controls function properly.

Sent from my Igloo.

[dragos90]

because the A8 steering wheel cost me 50Euro, and the S4 steering wheel is 400-500Euro :( ... I put the A8 steering wheel all works, only at this A8 steering wheel I do not have those vibrations, if I put this S4 steering wheel I will have vibrations?

[Smac770]

There's different multi-function buttons and harness depending on the steering wheel features.

multi-function, no paddles, no lane keep:
4E0 951 527 AD left and AE right, harness 4F0 971 589 C (6-wire)
multi-function, with paddles, no lane keep:
4E0 951 527 AH left and AJ right, harness 4F0 971 589 B (9-wire)
multi-function, with lane keep, with or without paddles:
4E0 951 527 AF left and AG right, harness 4L0 971 589 (10-wire)

There is also a 4F0 951 527 C left and D right pair of buttons that seem to be all black, equivalent in function to the AD/AE black/chrome pair.

So you should already have the necessary buttons and button harness, from your original wheel.

[Smac770]

The B8 A4/A5 (8K/8T, 2008+) uses the same buttons and button harness as the D3 A8 (4E, 2003+) and C6 A6 (4F, 2005+). So those are a non-concern.

The real complication will be the airbag. The airbag harness is unlikely to be the same, as the coil spring plug is unlikely to be the same. D3 and C6 supported heated steering wheel, B8 did not, so that's two less pins that have to be accommodated. Additionally, even if the D3 airbag harness plug fit, there's nothing to say the pinout is the same as for a B8 (same problem as using a B9 wheel on a B8). You could just use the airbag harness from your original wheel, that's what I would do. Which leaves you with the hard part maybe. Is there a two-stage airbag that will secure into the D3 wheel and plug compatibly with the B8 airbag harness.

A 3-spoke D3 wheel uses the 4E0 880 201 BN airbag and 4F0 971 589 A airbag harness. https://rrr.lt/en/used-part/agv12761...g-wheel-airbag That's not round like your picture. It's trapezoidal and screws into the wheel, just like the airbags for the B8.0 wheels (B8.5 uses the round snap-in airbags).

Are you sure what wheel you have? What's the actual part number on the inside of it?

[dragos90]

I mounted the Audi A8 steering wheel on the car and everything works, except for that vibration motor ... I would like to adapt a vibration motor on the Audi A8 steering wheel, but I have no where to connect it to the multifunction buttons, multifunction buttons Audi A4 don't fit fit instead of the Audi A8 multifunction buttons


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[Smac770]

I see now. Once you posted the actual part numbers for the wheel and controllers, it became clear they were only for early D3 A8 (2003-2005). Looking at it more, I see that the steering column and wheel and such changed for 2006, to the components which the B8 A4 later used also.

Which means you have a wheel which is not physically compatible with the buttons from your B8 A4 wheel. Had it been a wheel from a '06-'10 A8, the buttons would have swapped no issue.

So given that, the question is did any lane keep aware buttons exist for that wheel era? If we look at the wiki page on the A8, we see as one of the refresh points "Lane assist helps when the driver attempts to change lanes without signalling first.". So I'd venture no, there are no lane keep motor equipped wheels from the early D3 years nor any lane keep aware buttons from the early D3 years.

The steering wheel part number you have, 4E0 419 091 AR is listed as having been replaced by 4E0 419 091 BR. This is listed as being PR-1XX, and as having the paddles. Does yours have paddles? The listed multi-function button harness is 4E0 971 589 F. This might have 10 wires, but it's clearly not the same pin purposing of the 10 wire harness for the later D3 (and thus B8), as lane keep purpose didn't even exist in the early D3.


The J527 steering wheel electronics module in your B8 is communicating with the right side multi-function buttons via 6 wires through the coil spring and airbag harness. The J453 in that button module seems to understand the J527, and is translating the actions on the E441 buttons (right side module) and E440 buttons (left side module) just fine. But the J453 is likely just ignoring lane keep commands from the J527, because it likely has no understanding of the concept.

So you're fighting with the idea that the J453 is likely not even lane keep aware, and then you have no output on those particular buttons to attach any lane keep motor either.

[dragos90]

I can't buy other multifunction buttons and wiring from Audi A8 (2006-2010)? for example, this 4-spoke steering wheel seems to have multifunction buttons of the same design, but I do not know if it has the lane assist function, the problem would not be the vibration motor (the vibration motor will fit into the 3-spoke steering wheel beforeI I put another leather on the steering wheel) , but the wiring + the multifunction buttons to know function lane assist.

the picture is from a sales from internet
vol1.jpg

vol2.jpg

I really like this steering wheel compared to mine (it looks like steering wheel b7) and I want to make it functional ... buying other multifunction buttons if can

[Smac770]

That steering wheel is still a 2003-2005 D3 wheel. The difference from your other one is this one is heated (and no, you have no wires through your B8 coil spring to pass heat). But it's the same as your other early D3 wheel for regards to the multi-function buttons.

Here's the list of the early D3 wheels, which are the style you like, but whose multi-function buttons had no lane keep concept.
https://audi.7zap.com/en/rdw/audi+a8.../4/419-419000/

Notice AR is not listed, but BR is; when I try and find AR on the US parts site (https://parts.audiusa.com/productSea...rm=4E0419091AR) it comes back saying that was replaced by BR (https://parts.audiusa.com/p/Audi__/S...9091AR25D.html). And when I look at BR (https://parts.audiusa.com/p/audi__/S...9091BR1KT.html), it says it replaced BG and AR, and was only for 04/05 A8. Same for your CC, https://parts.audiusa.com/p/Audi__/S...9091CC1KT.html, what this fits, 04/05 A8.

Looking at the same ETKA style page for B7 (https://audi.7zap.com/en/rdw/audi+a4.../4/419-419020/), it looks like the one I linked, for early D3. So that says to me that the lane keep update that came in 2006 on the D3 came with a complete steering wheel overhaul, which cascaded to the B platform at B8. I don't think you'll find any early D3 / B7 style wheel that can host the later D3 / B8 style multi-function buttons with lane keep support. Not OE parts at least.

[dragos90]

ok, thank you, I going sell him the A8 D3 steering wheel , can you tell me what 3 spoke wheel steering would have lane assist with vibration? (the steering wheel in Das Ponto's post 2 has vibrations) I really want to change this steering wheel that looks like B7

[Smac770]

Well, here's what I feel I've been able to determine. While it seems the lane keeping assist system debuted in 2007 with the Q7, it's clear from the ETKA pages that Audi was already using the new steering wheel components on the A8 built in 2006. So with the A6, A8, Q7, around 2006 or 2007, they were using lane keeping assist capable steering wheels and multi-function buttons. These are the same parts that are used on the B8.0 vehicles. In this time, the lane keeping vibration motor was only ever installed on 4-spoke wheels. You won't find any 3-spoke wheel with the vibration motor.

Starting with the 2012 C7 (A6, A7) and the move to electro-mechanical steering, active lane assist system debuted. This used the steering rack rather than a motor in the steering wheel for vibrations. As such, 2012+ (C7) A6/A7 and 2014+ (D4.5) A8 will not have the motors in them. I can't tell if B8.5 moved to active lane keeping assist or not. US B8s never had lane keeping assist, so it's all foreign irrelevance here. So while the B8.5 steering wheels will have that round airbag even for four spoke, they may or may not have motors.

Here's a thread where they hacked the motor into a 3-spoke by just putting it behind the airbag. https://www.audiforum.us/threads/q7-...warning.15391/

But you're going to need a newer steering wheel than those from the pre-2006 A6/A8 and the B7 A4 era, one that would be compatible with the lane keep assist aware multi-function buttons that you already have.

That said, I don't think you were ever specific to your vehicle year. It is a B8.0 pre-facelift I'm assuming.

[dragos90]

sorry , my car is Audi A4 B8 2.0TDI engine code CAGA year 2008 , thanks you for all information