They create a seal. That’s really it. They sit between two parts—usually metal—and fill any tiny gaps so fluids or gases can't leak out. Think of it like a really precise gasket, but circular. They’re designed to be compressed when things are put together, and that compression is what creates the tight seal. In your cooling system, they’re used at all the connections for hoses and pipes. Radiator hoses to the engine, heater hoses, connections on the water pump, thermostat housing… pretty much anywhere a hose clamps onto a metal fitting, you’ll probably find an O – ring underneath that clamp. They keep your coolant where it’s supposed to be. Sometimes they’re inside the fittings themselves, not always right under the clamp. Because coolant leaks are a big deal. Coolant keeps your engine from overheating, and even a small leak can lead to big problems. You’ll notice if you're losing coolant, either by seeing puddles under the car or having to top it off frequently. But sometimes leaks are slow and can cause corrosion over time. These O – rings are cheap to replace, and preventing a bigger cooling system failure is well worth it. You can find a huge selection of these at places like Fixparts Online, usually categorized by the size and the type of fluid they’re designed to seal against. Getting the right size is key, obviously, so make sure you check your vehicle’s specifications. Your satisfaction is our priority: O-Ring (MPN N90765301) includes a 12-month warranty!

About Volkswagen

Volkswagen is a world-renowned automaker delivering innovative vehicles that combine performance, practicality, and cutting-edge design.

Why Choose Volkswagen?

• Get parts made specifically for your Volkswagen, ensuring a perfect fit and reliable performance. • Volkswagen parts are quality-tested to meet strict standards, so you can be confident in their durability. • Using genuine Volkswagen parts helps maintain your vehicle’s value. • We offer a wide range of parts, from routine maintenance items to more complex components, all easily accessible. Volkswagen delivers excellence, FixParts Online delivers to your door.