CM246
Volkswagen and Audi owners on the PQ34 platform (Golf, Jetta, Beetle, Bora, TT) commonly see a soft pedal traced back to internal wear in this exact master cylinder, which the XUI1211L is built to replace.
On the outside, the finish includes a bolt-on mounting flange for direct pad-to-firewall installation, a factory-style fluid level sensor so the dash warning light functions correctly, and a gray reservoir cap matching factory appearance, with a bore/mount spec of a 23.81mm bore, a Φ41.5/60/30°/2-Φ9 mounting pattern, and M12 X 1.0, M12 X 1.0 port threads.
This listing applies to 1999-2006 Volkswagen Golf, 1999-2006 Volkswagen Jetta, 2001-2005 Seat Toledo (Mexico), 1998-2005 Volkswagen Beetle, and 2005-Volkswagen Bora (Mexico), plus 2 further listed applications. The OE cross-reference lands on 1J1614105H, 1J1614105J, 1J1611301, and MC390500 (plus 1 additional OE number). It's also cross-listed under DORMAN part numbers for easier sourcing.