Vaico V20-1217 Engine Coolant Reservoir

Engine Coolant Reservoir for BMW Applications

The Vaico V20-1217 engine coolant reservoir is an OE-style replacement tank for select BMW cooling systems. Built with a sensor provision and sized to match the listed applications, it supports proper coolant expansion and level monitoring in vehicles such as the BMW 525i, 530i, 535i, and 550i.

VAICO product line components are developed for direct-fit replacement needs, with attention to factory-style dimensions and application-specific details. This reservoir is listed for BMW models using OE reference 17137542986.

Key Features

• Engine coolant reservoir for radiator and cooling system service
• Includes sensor provision: with sensor
• Dimensions: 283 mm length, 177 mm width, 250 mm height
• Weight: 1.206 kg
• Packaging size: 25 cm height, 17.7 cm width
• Cross-reference part numbers include BEHR 376789731 and Gates 38624

Detailed Description

Vaico V20-1217 is an engine coolant reservoir designed for BMW cooling system replacement where the original expansion tank has cracked, leaked, or no longer maintains stable coolant level control. It is listed for 2004-2007 BMW 525i, 530i, and 545i; 2006-2007 BMW 525xi, 530xi; 2006-2010 BMW 550i and 650i; 2008-2009 BMW 528i and 535i; 2008 BMW 528xi and 535xi; and 2009-2010 BMW 528i xDrive. This part number, V20-1217, also references OE No. 17137542986 for the listed applications.

Use this reservoir when servicing BMW 5 Series and 6 Series cooling systems that require a sensor-equipped expansion tank with the stated dimensions. The VAICO V20-1217 supports a direct replacement approach for BMW 525i, 530i, 535i, and 550i fitments across the model years shown.

What This Part Helps Address

• Coolant loss from a cracked or aging expansion tank
• Low coolant warnings related to reservoir sensor issues
• Overflow or venting concerns caused by a damaged tank
• Cooling system service after reservoir housing deterioration
• Fitment issues when replacing OE No. 17137542986

Installation Notes and Tips

Confirm the OE number, sensor configuration, and reservoir dimensions before installation. Inspect the coolant cap, hoses, and level sensor connector during replacement, and verify the cooling system is properly bled after installation to restore normal operation.

Quality Assurance

This reservoir is a VAICO aftermarket replacement built for the listed BMW applications and OE reference. Verify fitment against the vehicle’s original part number and sensor setup before ordering.