Quick guide on the location and procedure to replace the impulse sender/crank sensor on a Mk1 Audi TT. Car in video is a 2002 BAM engine. Note: I refer to the 10mm fixing as a ‘nut’ when in fact it’s a 10mm bolt. I’m not a professional mechanic so please take all guidance based on your own ability and discreation. Feel free to follow my progress on Instagram – aviatorgreytt