Keep coolant moving between the water pump and thermostat with the Gates Molded Coolant Hose 51738, a pre-shaped direct-fit replacement listed under both the coolant hose and HVAC heater hose part types. It's cataloged for the water pump-to-thermostat position on a range of 2006-2013 BMW models, including the 328I, 128I, 325I, 525I, 528I, 530I, X3, X5 and Z4 — see the Buyer's Guide tab for the full application and engine list.
Gates molds each hose to the OEM routing so it drops in without cutting, splicing or fighting the factory bends.
- EPDM construction: EPDM tube with synthetic fiber knit reinforcement and a heat-, ozone- and chemical-coolant-resistant EPDM cover.
- Collapse resistant: specifically-engineered materials help resist collapse under vacuum.
- Degradation resistant: engineered to resist electrochemical degradation, the leading cause of hose failure.
- Pre-shaped fit: molded to match the routing for a properly sealed connection.
Meets the requirements of SAE 20R4, class D2 and DIN 73411, class A (except for tolerances), with a temperature range of -40°F to +257°F (-40°C to +125°C). Do not use for fuel or oil transfer applications. Gates recommends replacing the hose clamps each time a new coolant hose is installed.
Interchange: 20850S · 11537521049 · F10414 · R19568 · CHE0409 · CHE0497
This part cross-references / interchanges with the following part numbers:
20850S, 11537521049, F10414, 51738, R19568, CHE0409, CHE0497
