Don’t know if it’ll help but I fitted some genuine GM seat belt guides to my M3 seats and am very happy with them. The part numbers are 10386174 & 10385983. I just needed to drill some new holes to accommodate the headrest poles of the M3 seats and they then just slide on.bz4kev wrote: ↑Mon Mar 18, 2019 8:36 amglad you found a set I love my m3 seats both sets they offer great comfort and adjustability just wish I could find a good answer to the seatbelt retainer think I could maybe design something and then find someone to maybe 3D print a pair definitely a work in progresswonkydonkey wrote: ↑Mon Mar 18, 2019 6:28 am Mr Tidy perhaps the bright lights of Essex are irresistible to us in the Southwest
The first Z4 I test drove had the M Sport seats, and although they held me in well, they don't have the adjustability that the M3 seats offer. As you say, they happen to cost several times what I bought the M3 seats for, so it was a no-brained for me
I did also try some genuine BMW seat belt holders from a Mini but they were cr@p
Unfortunately I can’t take any photos of the ones fitted in my Zed at the moment, but this will give you an idea of what they look like.
I picked mine up 2nd hand but I think they are also available new on eBay.