Flex Disc fits.
Great service from Finian. Not only did he confirm the part number with my VIN. He also checked for any outstanding recalls on my car.
Part bolted straight up without issue, the part that was installed on the car, by a precious owner, was the wrong part, they had installed a front flex disc, not the rear for the 130i. Having that extra check meant the same mistake could not be repeated. Will buy from V1 again.