Will this 87°C thermostat fit my Vanagon?

This 87°C thermostat (part number 025-121-113F) is designed specifically for all 1983.5–1991 VW Vanagon Waterboxer engines, including both 2WD and Syncro models. If your Vanagon has a Waterboxer motor from these years, this thermostat is a direct fit.

How easy is it to install the GoWesty 87°C thermostat?

Most Vanagon owners with some DIY experience find replacing the thermostat pretty straightforward. This thermostat comes with the correct O-ring included, so you won’t need extra gaskets for the job. Just make sure you have basic hand tools, follow your service manual or trusted Vanagon guide, and you’ll have it swapped out in about an hour.

Is this thermostat reliable, and how does it perform?

The aftermarket 87°C thermostat from GoWesty has received positive feedback from fellow Vanagon owners for its dependable performance and quality. It helps regulate engine temperature right where VW intended, balancing quicker warm-ups with excellent cooling. Customers report consistent function and peace of mind for their Waterboxer engines.

Do I need anything else to complete the thermostat replacement?

This kit comes with the necessary O-ring for installation, so you won’t need to search for extra seals. Depending on your Vanagon’s condition, you may want new coolant on hand to top off your system after the swap. Otherwise, this thermostat is ready to go right out of the box.

Is there a warranty or guarantee on this thermostat?

GoWesty stands behind the parts they offer. If you run into any fitment or quality issues with this 87°C thermostat, reach out to their team—they’re known for great customer service and will help ensure you get the right, functional part for your Vanagon.

Automotive engine thermostat and O-ring gasket on white background

Automotive thermostat and black rubber O-ring on white background, car engine part

Automotive engine thermostat with metal and rubber gasket on white background

Thumbnail of Automotive engine thermostat and O-ring gasket on white background

Thumbnail of Automotive thermostat and black rubber O-ring on white background, car engine part

Thumbnail of Automotive engine thermostat with metal and rubber gasket on white background

87°C Thermostat

Product:	025-121-113F
Works With:	1983-1991
Manufacturer:	Quality Aftermarket
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Proposition 65: This product may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm.

Thermostat for all Vanagon Waterboxers, 87°C. Includes O-Ring.

Reference numbers can be OE part numbers, superseded part numbers, and compatible part numbers. We provide this information to help ensure you're getting the right part for your needs.

025-121-113F
025121113F

87°C Thermostat

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