Vaico V25-0551 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap for Volvo and Land Rover

The Vaico V25-0551 engine coolant reservoir cap is a direct-fit replacement for select Volvo, Land Rover, and Mazda applications that use a 1.5 bar cooling system cap. With a 60 mm width and 38 mm height, it is built to match the reservoir opening and maintain proper pressure in the expansion tank.

VAICO product line parts are developed as aftermarket replacement components for European vehicle cooling and service applications, with fitment coverage that includes Volvo S60, XC60, XC90, V60, S80, XC70, and Land Rover Discovery Sport and Range Rover Evoque models.

Key Features

• Engine coolant reservoir cap with 1.5 bar pressure rating
• Measures 60 mm wide and 38 mm high
• Direct replacement for select expansion tank and coolant reservoir applications
• Fits multiple Volvo, Land Rover, and Mazda platforms
• Vaico V25-0551 replacement part number for catalog matching

Detailed Description

The Vaico V25-0551 is an engine coolant reservoir cap engineered for vehicles that require a 1.5 bar pressure cap on the cooling system expansion tank. Proper cap pressure is important for maintaining coolant system sealing and pressure control, especially on vehicles such as the Volvo S60, Volvo XC60, Volvo XC90, Land Rover Discovery Sport, and Range Rover Evoque. This part number, V25-0551, also cross-references Gates 31549 for the same application.

Use this cap when replacing a worn, cracked, or pressure-weakening reservoir cap on compatible Volvo, Land Rover, and Mazda models. The compact 60 mm x 38 mm dimensions support correct seating on the reservoir neck, helping restore the original cooling system closure point.

What It Helps Solve

• Coolant loss from a cap that no longer seals properly
• Pressure-related cooling system warning conditions
• Steam or odor from an expansion tank cap that is not holding pressure
• Visible wear, cracking, or deformation at the reservoir cap
• Incorrect replacement cap fitment on 60 mm coolant reservoirs

Installation Notes and Tips

Confirm reservoir neck diameter and pressure specification before installation. This cap is specified at 1.5 bar, so matching the original pressure rating is important for proper cooling system operation. Inspect the sealing surface and reservoir threads or locking tabs for damage before installing the new cap. Fits 2011-2018 Volvo S60, N/A; Fits 2016-2018 Volvo S60 Cross Country, N/A; Fits 2017-2018 Volvo S90, N/A; Fits 2015-2018 Volvo V60, N/A; Fits 2016-2018 Volvo V60 Cross Country, N/A; Fits 2018 Volvo V90, N/A; Fits 2017-2018 Volvo V90 Cross Country, N/A; Fits 2010-2018 Volvo XC60, N/A; Fits 2016-2018 Volvo XC90, N/A; Fits 2015-2017 Land Rover Discovery Sport, N/A; Fits 2015-2017 Land Rover Range Rover Evoque, N/A; Fits 2007-2016 Volvo S80, N/A; Fits 2008-2016 Volvo XC70, N/A; Fits 2015 Land Rover LR2, N/A; Fits 2008-2014 Land Rover LR2, N/A; Fits 2012-2014 Land Rover Range Rover Evoque, N/A; Fits 2004-2013 Mazda 3, N/A; Fits 2012-2013 Mazda 3 Sport, N/A; Fits 2009-2010 Mazda 3 Sport, N/A; Fits 2007-2013 Volvo C30, N/A; Fits 2006-2013 Volvo C70, N/A; Fits 2004-2011 Volvo S40, N/A; Fits 2005-2011 Volvo V50, N/A; Fits 2008-2010 Volvo V70, N/A.

Quality Assurance

Vaico supplies aftermarket replacement parts for European vehicle maintenance needs, and this coolant reservoir cap is cataloged to match the specified application and pressure rating. Verify part number V25-0551 against the vehicle’s original cap and cooling system requirements before installation.