For VAG Reference Number 3391. for VW Passat 2.4 V6 1996-2002. for VW Passat 2.8 V6 1996-2001. Pin: Special designed for fixing the crankshaft angle. Crankshaft lock pin holds crankshaft at TDC (top dead center) when removing and installing toothed timing belt and flywheel/drive plate.