Keep coolant flowing where your BMW's cooling system routes it with the Gates Modular Coolant Hose 51620, an HVAC Heater Hose / Modular Coolant Hose that serves as the vent tube from the engine to the expansion tank. It drops in as a direct-fit replacement for the 2006-2008 BMW 750I and 2006-2008 BMW 750LI — see the Buyer's Guide tab for engine details.
Gates is a leader in the modular assembly coolant hose segment, building each hose to fit specific applications with the essential integrated components an application calls for, such as hose branches, quick-connectors, sensors, and restrictors.
- Modular construction: made with OEM-exact hose components (quick connects, branch connectors/tees, sensors, etc.).
- EPDM build: EPDM tube with synthetic fiber knit reinforcement and a heat-, ozone- and chemical coolant-resistant EPDM cover.
- Engineered materials: resist collapse under vacuum and resist electrochemical degradation, a leading cause of hose failure.
- Rated: meets SAE 20R3 EC Class D1 under 25mm (1 in.) ID and SAE 20R4 EC Class D1 for 25mm (1 in.) ID and over; temperature range -40°F to +257°F (-40°C to +125°C).
Gates recommends replacing the clamps each time a new coolant hose is installed. Do not use for fuel or oil transfer applications.
Interchange: 27430X · 17127534527 · F11258 · R19735 · CHE0553
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What is the Gates 51620 and where does it go?
It is a modular coolant hose that serves as the vent tube running from the engine to the expansion tank on the listed applications.
Which vehicles does this hose fit?
It is a direct-fit replacement for the 2006-2008 BMW 750I and 2006-2008 BMW 750LI. Check the Buyer's Guide tab to confirm fitment for your vehicle.
What is the hose made of?
It uses an EPDM tube, synthetic fiber knit reinforcement, and a heat-, ozone- and chemical coolant-resistant EPDM cover, engineered to resist collapse under vacuum and electrochemical degradation.
What temperature and standards does it meet?
It handles -40°F to +257°F (-40°C to +125°C) and meets SAE 20R3 EC Class D1 under 25mm ID and SAE 20R4 EC Class D1 for 25mm ID and over.
Do I need new clamps when installing it?
Gates recommends replacing the clamps each time a new coolant hose is installed. Do not use this hose for fuel or oil transfer applications.
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