Basically, it takes the hot coolant from your engine – you know, the stuff that keeps the engine from overheating – and uses the heat from that to warm up the air blowing into the cabin of your car. It’s a small radiator, but instead of cooling things down, it transfers heat. It's got these little fins inside, and the air from your blower motor passes over them, getting warmed up before it comes out of your vents. It’s a key part of your car’s heating and ventilation system. Coolant flows through it, and the blower motor forces air across it. That’s what gives you warm air when you select heat. It’s usually located inside the dashboard, behind the glove box or under the center console. Well, without it, you won't get any heat in the winter. You'll notice if it’s failing because you'll have little or no heat, even when the engine is fully warmed up. Sometimes you might smell a sweet, sickly odor – that’s usually coolant leaking inside the cabin, which means the heater core is cracked or sprung a leak. That’s not good – coolant is toxic and can fog up your windows. It acts like a shield against the cold for you and your passengers. A failing heater core isn't something you want to ignore. If you're thinking of doing this repair yourself, you can find a replacement interior heat exchanger and other cooling system parts at a place like Fixparts Online, but it’s a bit of a job to replace, so be prepared. Backed by trust: Interior Heat Exchanger Spare Parts (MPN AHX4000P) comes with a 12-month warranty!

About MAHLE

Mahle is a leading German supplier of engine components and thermal management solutions, celebrated for its technological innovation. Based in Germany, Mahle drives advancements in automotive efficiency and sustainability.

Why Choose MAHLE?

• MAHLE parts are built to last, using high-quality materials and advanced engineering so you get reliable performance for years to come. • We make a huge range of parts, from engine components to filters and HVAC systems, meaning you can get almost everything you need from one trusted brand. • MAHLE is an original equipment supplier to many major car manufacturers, so you know our aftermarket parts meet the same tough standards. • We’re constantly innovating to improve our parts and develop new technologies, keeping your vehicle running efficiently and smoothly. Drive with confidence – choose MAHLE parts at FixParts Online.