Vaico V20-1288 Engine Coolant Reservoir Hose - Upper

Engine Coolant Reservoir Hose for BMW Cooling Systems

This Vaico engine coolant reservoir hose is a direct-fit cooling hose for the expansion tank to ventilation pipe connection. Built to match OE number 17 12 7 521 775, it supports proper coolant routing in BMW 525i, 525xi, 530i, 530xi, 528i, 528i xDrive, and 528xi applications.

• Cooling hose location: from expansion tank to ventilation pipe
• OE reference: 17 12 7 521 775
• Length: 590 mm
• Width: 180 mm
• Height: 50 mm
• Brand: Vaico / VAICO
• Part number: V20-1288

VAICO Product Line Details

VAICO focuses on OE-style replacement components for European vehicles, with fitment and dimensions matched to the original application. This V20-1288 hose is specified for BMW cooling system service where the reservoir-to-ventilation routing must align with factory hose geometry.

Fitment and Application

• Fits 2008-2010 BMW 528i, Upper; Grade: Aftermarket; Reservoir to Radiator; VAICO
• Fits 2009-2010 BMW 528i xDrive, Upper; Grade: Aftermarket; Reservoir to Radiator; VAICO
• Fits 2008 BMW 528xi, Upper; Grade: Aftermarket; Reservoir to Radiator; VAICO
• Fits 2006-2007 BMW 525i, Upper; Grade: Aftermarket; Reservoir to Radiator; VAICO
• Fits 2006-2007 BMW 525xi, Upper; Grade: Aftermarket; Reservoir to Radiator; VAICO
• Fits 2006-2007 BMW 530i, Upper; Grade: Aftermarket; Reservoir to Radiator; VAICO
• Fits 2006-2007 BMW 530xi, Upper; Grade: Aftermarket; Reservoir to Radiator; VAICO

What This Hose Helps Address

• Coolant seepage at a cracked or aged reservoir hose
• Restricted coolant transfer between the expansion tank and ventilation pipe
• Improper hose routing after cooling system service
• Loss of hose flexibility from heat cycling and age
• Fitment issues when replacing an OE-style BMW coolant hose

Installation Notes and Tips

Confirm the OE number 17 12 7 521 775 and verify hose routing before installation. Inspect adjoining cooling system connections, clamps, and plastic fittings for wear or damage, and replace any compromised parts during service. This hose is listed for upper-position BMW cooling applications, so match the vehicle and routing exactly to the fitment data before installation.

Quality Assurance

Vaico supplies OE-referenced replacement parts for European vehicle maintenance, and this hose is cataloged to the original BMW application and dimensions. Part number V20-1288 is also referenced under 7 521 775 and 17 12 7 521 775 for the same application.