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Airbag Cable For MFSW

Let's have a look at your Steering Wheel Airbag Cable for your Audi A3 8P or Audi S3 8P. If you read this, you don't have MFSW, yet. Why spending 25€ for a new Airbag Cable harness instead of inserting 3 extra wires in a plug that you already have? So, your airbag cable look exactly like in the video (OEM 8P0971589). I call it TYPE 1. It has a 12 pins yellow/orange connector, but 6 of them are unused. The airbag only uses 4 golden pins in this yellow/orange connector, and go straight to green and orange airbag detonator connectors. I won't bother them!
The yellow/orange connector shorts airbag wires by pairs when disconnected, to prevent unwanted blowups.
The two last used pins are connected to ground and Horn contact.

Yellow/Orange Connector pinout:

Pin 1 = unused
Pin 2 = unused
Pin 3 green = green airbag plug
Pin 4 white = green airbag plug
Pin 5 blue = orange airbag plug
Pin 6 orange = orange airbag plug
Pin 7 black = Ground (-12V)&Horn
Pin 8 brown =Horn
Pins 9-12 = unused

You need a new Steering Wheel Airbag Cable for Your Audi A3 8P or Audi S3 8P, like this one in the video (OEM 8P0971589AD Q or 8P0971589Q). I call it TYPE 2. The difference between them is the black 6 pins connector (4B0971978B or 4B0971978C) and the 3 wires between the black connector and the yellow/orange connector (same connector like TYPE 1).

Black connector pinout:

Pin 1 red = LIN (data bus)
Pin 2 yellow = +12V
Pin 3 black = Ground
Pin 4, 5, 6 = unused

Yellow/Orange Connector pinout:

Pin 1 = unused
Pin 2 = unused
Pin 3 green = green airbag plug
Pin 4 white = green airbag plug
Pin 5 blue = orange airbag plug
Pin 6 orange = orange airbag plug 
Pin 7 black = Ground (-12V)&Horn
Pin 8 brown =Horn
Pin 9 blue = LIN (data bus)
Pin 10 red = +12V
Pins 11-12 = unused

So, I did it! I used a standart speaker to motherboard computer connector or standard cooler connector to fit the black plug on the new Multi Function Steering Wheel (MFSW). You can find it inside any old computer, printer, LCD, etc. Audi sales appropriate spare connector (4B0971978B or 4B0971978C). You can use the speaker wires and connector, or 3 repair wires (OEM 000 979 009 E). The repair wires need to be shortened somehow.
I used the speaker wires and connector to build my harness because there is little space behind the airbag, and I did't wanted to bother airbag deployment in any way. Or, you can start searching HERE.

Connection

Airbag Cable Audi A3 8P or Audi S3 8P Pinout
Yellow Connector->Black Connector

Pin 9 blue (LIN)->Pin 1 blue (LIN)
Pin10 red(+12)-Pin 2 red(+12)
Pin 7 black(Ground)->Pin 3 black

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Please note that this is only a guide and that I take no responsibility for any damage/problems. © Copyright 2019 Audi A3 8P Retrofit - All Rights Reserved