Are we going to get any feedback following Chris James’ advice then?

My thanks to all that responded to my initial query regarding the recommended life of the timing belt on my Q3. Your comments have been very useful. Despite Audi still sticking with their life of 186,500 miles or 15 years I'm going for something in the region of 6 years or 70,000 miles. I would rather spend £1500 +/- now than umpteen thousands in a few years. Subject now closed

Thank you both Stevey and Spartacus very helpful of you. Steven, I just downloaded my original VCDS attachment from this site and that scrolls OK, so who knows why yours won't; another gremlin! I have attached an idiot's guide I found on the EPB which does refer to the control module you referred to but I understand that on my A3 8V, an MQB platform vehicle, this module is integrated into the ABS ECU. The VCDS coding section for the EPB control unit is 53, but this does not appear in my VCDS log which supports the suggestion that the EPB function is now within the ABS ECU at 03 coding. AudiParkingBrake.pdf

Concur with Steve. Very frustrating. Given you're in £3k deep, absolutely nothing wrong with taking a closer look at the parking brake module. It lives under the central console behind the parking brake switch, etc. Copy of the section from VCDS, for reference. Just to be clear - when caliper was changed, was old EPB swapped over, or was the electric handbrake unit new too?

Many thanks.