TT Steering Wheel 2006

Hello, I once saw that the airbag in the steering wheel of the latest Audi TT has two cables connected to the ignition coil. Can anyone tell me what those cables are for? And what's the difference compared to older models? If you were to install this steering wheel in an Audi A4 8E, would you also need to replace the airbag control unit, or would the airbag still work with the old control unit?

Audi now uses two-stage airbags for both the driver and passenger.
This type of igniter requires a separate control signal for each ignition pulse.

Best regards,

hello,
'So, will the old control unit trigger the new airbag? Or how should I understand this? Because the connectors fit together (A4 8H), but will the airbag deploy in the event of an impact? (I think no one has tried this yet, and I assume it won't work like that).'

I haven't looked at the wiring diagram yet.
However, you will need two separate connection cables for the two separate blasting capsules, which will be controlled separately from the control unit. I cannot tell you exactly how the connector fits, but I suspect that at least one more pin is used.

The old control unit will, at best, ignite one of the two capsules, as the software is only programmed to do so; at worst, it will ignite none .

Best regards, Jochen.

P.S. I would advise against attempting any modifications here. At most, try to fit the old airbag into the new steering wheel. If it's not mechanically fully compatible, please abandon your modification idea for safety reasons.