Gates 51588 HVAC Heater Hose - Water Pump To Thermostat

BMW Heater Hose Replacement

Gates 51588 is a molded coolant hose for the water pump to thermostat circuit on select BMW applications. Built from EPDM and formed to OEM-style dimensions, it supports a precise coolant routing path for service replacement on BMW 135i, 335i, X1, Z4, and related models.

Key Features

• EPDM construction for coolant-system durability
• Molded hose profile for a factory-style fit
• 1.45 in. (37 mm) inside diameter at End 1
• 1.47 in. (37 mm) inside diameter at End 2
• 12 in. (305 mm) centerline length
• No spring, no modular sections, and no quick-connect fittings
• Direct replacement for the water pump to thermostat hose path

Product Details

This Gates Molded Coolant Hose line is built for upper, lower, bypass, heater, and other coolant applications, with this part configured as an HVAC heater hose style replacement for BMW cooling-system routing. Part number 51588 follows OEM-quality specifications to help restore the original hose shape and connection geometry. This part cross-references Genuine 11537545665 for the same application.

Compatible With BMW 135i, 2008-2013, water pump to thermostat; BMW 135is, 2013, water pump to thermostat; BMW 1 Series M, 2011, water pump to thermostat; BMW 335i, 2007-2013, water pump to thermostat; BMW 335i xDrive, 2009-2013, water pump to thermostat; BMW 335is, 2011-2013, water pump to thermostat; BMW 335xi, 2007-2008, water pump to thermostat; BMW 535i, 2008-2010, water pump to thermostat; BMW 535i GT, 2010, water pump to thermostat; BMW 535i xDrive, 2009-2010, water pump to thermostat; BMW 535xi, 2008, water pump to thermostat; BMW X1, 2013-2015, water pump to thermostat; BMW X6, 2008-2010, water pump to thermostat; BMW Z4, 2009-2014, water pump to thermostat.

Common Repair Uses

• Cracked or hardened coolant hose replacement
• Coolant seepage at the hose connection points
• Incorrect hose routing after prior repairs
• Heat-related hose deformation in the cooling circuit
• Restoring the water pump to thermostat coolant path

Installation Notes

Verify hose routing, end diameters, and centerline length before installation. Inspect adjoining fittings, clamps, and mating surfaces for wear or corrosion, and confirm the hose is seated correctly along the water pump to thermostat path on the BMW X1, BMW 335i, BMW Z4, and other listed applications.

Quality Assurance

Gates molded coolant hoses are manufactured to OEM-quality specifications and are part of a broad replacement hose line for coolant-system service. Part number 51588 is built to match the intended molded shape and dimensions for the listed BMW applications.