Mercedes Exhaust Manifold Heat Exchanger - Genuine Mercedes 6421400275

Product Information

The EGR (Exhaust Gas Re-circulation) cooler is an air to liquid heat exchanger that uses engine coolant to reduce exhaust gas temperatures prior to recirculating it back into the engines intake system. This system is intended to reduce NOX emissions but also significantly reduces thermal stress on cylinder head gaskets and intake/exhaust valves. It is recommended to regular inspect EGR coolers to ensure there is no antifreeze leak coming from them.

• Engine overheating
• Exhaust leak
• Coolant leak
• CEL illuminated with codes pertaining to insufficient EGR flow

About Genuine Mercedes

The original parts used by Mercedes Benz to build your car are available as replacement parts under the “Genuine Mercedes Benz” brand. Manufactured under the direction of Mercedes Benz, expect excellent quality and a premium price since these parts are exclusively available through the Mercedes Benz Dealership network.

You may not realize this, but the parts that make up your Mercedes-Benz are not necessarily manufactured by Mercedes-Benz. No cause for concern, as Mercedes-Benz designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for Mercedes-Benz for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine Mercedes-Benz parts box and find an OEM branded part inside, simply with the addition of a Mercedes-Benz logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.