This is what you need if you fit an aftermarket seat that does not plug into the factory socket. Such as a Recaro, OMP, Sparco, Bride etc. This tricks the car into thinking you have a factory seat with airbag so you do not get the dreaded airbag warning light which disables all your airbags! Uses OEM plug for a perfect fit that won't come loose.
If you are in the US you may also have a Seat rail position sensor and if fitting replacement passenger seat, an occupancy sensor.
Best way to deal with these is to remove the harness from your stock seat or buy a replacement harness. The part number will be on a white tag on the harness. Contact me if you get stuck here and I can advise.
Installing the plug
Install with the car not turned on and you should not get a light at all. If you do get a light you will need to clear out using VAGCOM or OBDeleven.
Introductory price for first batch. More currently being made. Order now before price rise.
To remove factory plug. Slide black part of the plug you should hear a click. Push down on the top of it to release it and pull the plug off. It will be firm, you need to push down firmly on the black part, you should hear/feel something releasing.
Ensure pink bit on the side is pressed in (I press them all in). If it is visible when looking into the plug then it needs to be pressed in as it prevents the plug from being inserted.
Plug will "click" into place. Push/slide the black part down to secure it in place.