Expansion Tank Hose - 535i (89-93), M5 (91-93), 735i (88-92) (Continental/Germany) - multi-branched coolant expansion tank recovery hose (often listed as a 3-way or radiator/engine return hose). This specialized molded hose connects the bottom of the coolant expansion tank over to the water distributor on the front of the cylinder head, with an integrated branch line routing to the HVAC heater core circuit. It handles crucial pressure stabilization and fluid return across the primary cooling and interior heating loops. (gar2-Y7)
- BMW 7 Series (E32): 735i and 735iL (1988–1992)
- BMW 5 Series (E34): 535i (1989–1993)
- BMW 5 Series / M Performance (E34): M5 (1991–1993 with the S38 engine)