Genuine 17127542540 Engine Coolant Reservoir Hose
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Genuine

Genuine 17127542540 Engine Coolant Reservoir Hose

Brand Genuine 17127542540
Fits BMW · 14 vehicles

OE direct replacement. Engine coolant reservoir hose for a precise, factory-style fit.

Connects the coolant reservoir to keep coolant circulating properly.

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BMW Engine Coolant Reservoir Hose

This Genuine engine coolant reservoir hose, part number 17127542540, routes coolant from the upper expansion tank fitting to the cylinder head. It is a direct-fit cooling system hose for select BMW V8 applications, including BMW 545i, 550i, 645Ci, and 650i models.

Key Features

  • Genuine OE replacement hose for the engine cooling system
  • Part number 17127542540 for accurate ordering and fitment lookup
  • Connects the upper expansion tank fitting to the cylinder head
  • Compatible with select 2004-2010 BMW 545i, 550i, 645Ci, and 650i applications
  • Built for BMW cooling system service and hose replacement work

Detailed Description

Use this Genuine coolant reservoir hose when replacing a worn, cracked, or leaking hose in the BMW cooling circuit. The hose is specified for the route from the upper expansion tank fitting to the cylinder head, making it a direct-match service part for the listed BMW 545i, 550i, 645Ci, and 650i vehicles. If you are searching for BMW 550i coolant reservoir hose 17127542540 or BMW 645Ci engine coolant hose replacement, this part number identifies the correct application.

This part cross-references no additional part numbers in the provided data.

What It Is Used For

  • Replacing a cracked coolant reservoir hose
  • Repairing coolant seepage at the expansion tank connection
  • Restoring coolant flow between the upper tank fitting and cylinder head
  • Addressing hose deterioration from heat and age
  • Correcting cooling system leaks during BMW 545i, 550i, 645Ci, or 650i service

Installation Notes and Tips

  • Verify the vehicle year and model before installation.
  • Confirm the hose route matches the upper expansion tank fitting to cylinder head configuration.
  • Inspect adjoining cooling system connections for wear, residue, or damage before assembly.
  • Bleed the cooling system according to BMW service procedures after replacement.

Quality Assurance

Genuine OE-style replacement part engineered for the listed BMW applications. Part number 17127542540 helps ensure correct identification for BMW cooling system repairs.

Related reading

This part fits 14 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2010BMW550iN/AFrom Upper Expansion Tank Fitting to Cylinder Head
2010BMW650iN/AFrom Upper Expansion Tank Fitting to Cylinder Head
2009BMW550iN/AFrom Upper Expansion Tank Fitting to Cylinder Head
2009BMW650iN/AFrom Upper Expansion Tank Fitting to Cylinder Head
2008BMW550iN/AFrom Upper Expansion Tank Fitting to Cylinder Head
2008BMW650iN/AFrom Upper Expansion Tank Fitting to Cylinder Head
2007BMW550iN/AFrom Upper Expansion Tank Fitting to Cylinder Head
2007BMW650iN/AFrom Upper Expansion Tank Fitting to Cylinder Head
2006BMW550iN/AFrom Upper Expansion Tank Fitting to Cylinder Head
2006BMW650iN/AFrom Upper Expansion Tank Fitting to Cylinder Head
2005BMW545iN/AFrom Upper Expansion Tank Fitting to Cylinder Head
2005BMW645CiN/AFrom Upper Expansion Tank Fitting to Cylinder Head
2004BMW545iN/AFrom 7/2004; From Upper Expansion Tank Fitting to Cylinder Head
2004BMW645CiN/AFrom 7/2004; From Upper Expansion Tank Fitting to Cylinder Head