Caution: the cross-reference (Audi P/N 443 611 021) HITEC BMC P/N H417150 does NOT fit the G VIN urq's brake servo, the outer end diameter of the HITEC BMC is much bigger and thus not fit inside the black plastic housing of the brake servo. BTDT. It's 100 Euro cheaper though... Regards, Maurits 1986 GV (Swiss WR) 1985 CGT KV 1982 GL DD