Vaico V20-0878 Radiator Coolant Hose - Lower

Radiator Coolant Hose for BMW Cooling Service

Vaico V20-0878 is a radiator coolant hose that routes coolant from the thermostat to the radiator. It is built for lower-position applications on select BMW V8 models, including BMW 545i, BMW 645Ci, BMW 745i, BMW 745Li, BMW 750i, and BMW 750Li.

Use this hose when replacing a worn or leaking cooling line on a BMW 750i lower radiator coolant hose application or a BMW 745Li thermostat-to-radiator hose service. The Vaico V20-0878 follows the OE reference 17127519250 for direct-fit replacement planning.

Key Features

• Radiator coolant hose for the cooling system
• Routes coolant from thermostat to radiator
• Lower-position fitment for listed BMW applications
• Length: 400 mm
• Height: 50 mm
• Width: 150 mm
• Weight: 0.302 kg
• Cross-reference part numbers include 7 508 011 and 17127519250

Detailed Description

Vaico V20-0878 is a formed cooling hose used in the thermostat-to-radiator circuit on select BMW models. Its OE-referenced application makes it a practical choice for service work where the original hose has aged, softened, cracked, or begun to seep coolant. The hose dimensions and lower placement support accurate replacement on BMW 545i, BMW 645Ci, BMW 745i, BMW 745Li, BMW 750i, and BMW 750Li vehicles.

VAICO product line parts are selected for European vehicle maintenance and replacement work, with attention to OE-style fitment and application matching. This part cross-references 17127519250 and 7 508 011 for the same application.

Vehicle Fitment

• Fits 2006-2008 BMW 750i, lower. Grade: Aftermarket; With OE No. 17127519250; VAICO
• Fits 2006-2008 BMW 750Li, lower. Grade: Aftermarket; With OE No. 17127519250; VAICO
• Fits 2004-2005 BMW 545i, lower. Grade: Aftermarket; With OE No. 17127519250; VAICO
• Fits 2004-2005 BMW 645Ci, lower. Grade: Aftermarket; With OE No. 17127519250; VAICO
• Fits 2002-2005 BMW 745i, lower. Grade: Aftermarket; With OE No. 17127519250; VAICO
• Fits 2002-2005 BMW 745Li, lower. Grade: Aftermarket; With OE No. 17127519250; VAICO

Common Issues This Hose Can Address

• Coolant leaks from a cracked or hardened hose
• Loss of coolant at the thermostat-to-radiator connection
• Cooling system service on a BMW 750i or BMW 745Li
• Visible swelling, splitting, or deterioration in the lower coolant line
• Replacement of an OE-referenced hose during radiator or thermostat repair

Installation Notes and Tips

Confirm the OE number and vehicle application before installation, especially on BMW cooling system repairs where hose routing and lower-position fitment must match exactly. Inspect adjoining thermostat, radiator, and clamp interfaces for wear, contamination, or residue before installing the new hose. After installation, refill and bleed the cooling system according to BMW service procedures and verify there are no leaks at operating temperature.

Quality Assurance

Vaico V20-0878 is an OE-referenced aftermarket replacement for the listed BMW applications and is identified with the VAICO brand line for European vehicle service parts.