This little piece basically seals where your coolant thermostat housing meets the engine block. It creates a watertight connection, preventing coolant leaks. Sometimes it includes a gasket, sometimes the gasket is separate, but either way, it’s all about making sure things don’t leak. It’s usually made of plastic or metal, depending on the vehicle. Think of your cooling system like a circulatory system for your engine. Coolant flows through it, carrying heat away. The thermostat housing is where the thermostat lives, controlling that flow. The flange is a key part of that housing—it’s where it physically connects to the engine. Without a good seal there, things get messy pretty quick. It helps maintain the proper operating temperature of your engine. If this flange fails, you’ll almost certainly see a coolant leak. You’ll notice if it’s a big leak pretty quickly—steam under the hood, coolant puddles. Even a small leak can cause big problems over time. Coolant is vital for preventing overheating, and losing coolant means your engine could run hot. That can lead to everything from minor damage to a completely blown head gasket. It acts like a shield, protecting the engine from extreme temperatures. Replacement isn’t usually too difficult, and you can find them pretty easily online. We carry a good selection at Fixparts Online, but you can get them elsewhere too. Addressing this leak quickly saves you from bigger, more expensive repairs down the line. Shop with confidence: Coolant Thermostat Housing Flange (MPN 12403) comes with a 3 year manufacturer guarantee!

About Febi

Ferdinand Bilstein is well known for reliability and is trusted by repair professionals worldwide.

Why Choose Febi?

• Febi parts are made to the same standards as original equipment, so you get reliable quality. • We offer a really wide range of parts, covering most makes and models – meaning you can likely find everything you need in one place. • Febi has been around for over 75 years, so we know a thing or two about auto parts and what mechanics need. • Our parts are priced fairly, giving you a great balance between quality and cost. FixParts Online – Your Trusted Source for Quality Febi Auto Parts.