It seals the cooling system, maintains pressure, and allows coolant to flow back into the radiator from the overflow tank. It’s really a pretty simple part, but it handles some important jobs. It has a pressure relief valve – that’s what lets coolant escape if things get too hot and expands too much, and then it sucks it back in when the engine cools down. There’s also a vacuum valve that lets air in as the system cools, preventing a vacuum from forming which could collapse your hoses. Basically, it’s the top of your cooling system. The whole system is designed to keep the engine from overheating, and the cap is the final point of control. It keeps everything sealed tight so the coolant doesn't boil over and so you don't lose coolant while driving. Think of it like the lid on a pressure cooker – it manages the pressure inside. A bad radiator cap can cause a lot of issues. If it doesn't hold pressure, your engine can overheat, leading to serious damage. If the pressure relief valve fails, it could cause hoses to burst or coolant to spray everywhere. You’ll notice if it’s failing probably by seeing coolant leaking around the cap, or maybe the temperature gauge creeping up. It's a cheap part to replace, honestly, and it can save you a lot of money down the road. You can find a good one at Fixparts Online, or just about any auto parts store, but it's worth making sure you get the right pressure rating for your vehicle. Choose quality: Radiator cap (MPN CRB96000S) is backed by a 12-month warranty!

About MAHLE

Mahle is a leading global supplier of engine components, thermal management, and filtration solutions.

Why Choose MAHLE?

• MAHLE parts are built to last, using high-quality materials and manufacturing processes so you get reliable performance. • We offer a wide range of parts, covering everything from engine components to filters and beyond – meaning you can find what you need all in one place. • MAHLE is a trusted name in the automotive industry, with over 100 years of experience and a commitment to innovation. • Our parts are designed to meet or exceed original equipment specifications, giving you peace of mind and helping your vehicle run its best. FixParts Online – Your Trusted Source for Quality MAHLE Auto Parts.