This thing basically handles the extra space coolant needs as it heats up and cools down. Coolant expands when it gets hot, and contracts when it cools. Instead of that pressure building up and potentially causing a leak somewhere – or worse, damaging something – the expansion tank gives the coolant a place to go. It’s a sealed reservoir, so it also helps keep air out of the cooling system, which is important for efficient heat transfer. It’s not just a holding tank, though. It also typically has a cap with a pressure relief valve, so if things do get too pressurized, it’ll release a little to keep everything safe. It sits in the cooling system, usually near the radiator, and is connected by hoses. Think of it as a buffer. It’s part of a closed loop—the engine creates heat, the coolant absorbs it, the radiator cools the coolant, and then the expansion tank manages the volume changes as all that happens. It’s pretty crucial for the whole system to work correctly. Well, if the expansion tank fails, you could get a coolant leak, obviously. That’ll lead to overheating, which can cause serious engine damage. Even a slow leak can cause problems over time, like corrosion. You’ll notice if it’s failing usually because you'll see coolant under the hood, or the engine temperature gauge will start to climb higher than normal. Keeping this topped off and making sure it's not cracked or leaking is a pretty simple way to avoid a lot of headaches. You can find a replacement pretty easily, Fixparts Online has a good selection, and it’s usually a straightforward repair for a decent DIYer. Ignoring it could end up costing you a lot more in the long run. More than just a part: Expansion Tank (MPN CRT197000S) includes 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 made to the same high standards as the original equipment in your vehicle, so you know you’re getting quality. • We offer a wide range of parts, from engine components to filters and more, covering most makes and models. • MAHLE invests in research and development to bring you the latest technology and improve performance and fuel efficiency. • You can trust MAHLE for reliable parts that are built to last, giving you peace of mind on the road. Drive with confidence – choose MAHLE parts at FixParts Online.