EGR Cooler Valve Mercedes W207 W212 OM642 Diesel Exhaust A6421402475

The Mercedes W207 W212 OM642 Exhaust Gas Cooler EGR Valve is an original exhaust gas recirculation component designed for Mercedes diesel engines from the OM642 family. This component from the EGR Valves and Parts group is responsible for controlled cooling of exhaust gases before they are reintroduced into the manifold, which promotes stable engine operation and emission reduction. Thanks to its factory design, it ensures proper fitment with the exhaust system and engine accessories.

Specifications and technical data

• SKU: A6421402475
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421402475
• Substitutable numbers: A6421402475, A 642 140 24 75, BG
• Location on the vehicle: Front
• Fuel type: Diesel
• Category: EGR Parts & Valves

Purpose and Function in the EGR System

The exhaust gas cooler integrated with the EGR valve in Mercedes W207 and W212 models with the OM642 engine operates at the front of the vehicle, within the engine bay. Its function is to lower the temperature of exhaust gases directed back into the intake, which:

• stabilizes the combustion process in the diesel unit,
• reduces the formation of nitrogen oxides (NOx),
• supports the correct operation of emission control systems,
• lessens the thermal load on engine accessory components.

The combination of the exhaust gas cooler and EGR valve into a single unit simplifies system servicing and allows for consistent diagnostics of the recirculation circuit in Diesel engines.

Construction and Fitment for Mercedes W207 / W212

The offered component has been specifically designed for the OM642 engine architecture and the exhaust system in W207 and W212 body styles. The design includes:

• dedicated connection ports for the exhaust gas circuit and cooling system,
• an integrated valve controlling exhaust gas flow in the EGR circuit,
• geometry adapted to the front area of the engine bay,
• factory mounting points to the block and accessories.

This solution preserves the original flow path for exhaust gases and coolant, which is crucial for the correct operation of the engine control unit and compliance with factory injection and recirculation maps.

Characteristics of a Used Component

The offered exhaust gas cooler with EGR valve is a used part, sourced from disassembly. Such components are often chosen for servicing EGR systems in modern diesel units because they allow for maintaining the vehicle's original specifications at a reasonable repair cost. For exhaust gas recirculation systems, maintaining structural compatibility with the factory design is particularly important, promoting seamless adaptation within the engine control unit.

Benefits of Using an Original EGR Exhaust Gas Cooler

Using an original exhaust gas cooler and EGR valve assembly in the OM642 engine offers a range of practical benefits:

• Proper Interaction with Engine Electronics – maintaining flow and cooling parameters consistent with manufacturer specifications.
• Reduced risk of diagnostic errors related to improper exhaust gas recirculation.
• Maintenance of stable exhaust gas temperatures within the EGR circuit, promoting smooth operation of the diesel unit.
• Better compatibility with other components of the exhaust and cooling systems in Mercedes W207 / W212.

For users who wish to preserve the factory operating characteristics of their engine, choosing an original component from the EGR Valves and Parts group is a particularly advantageous solution.

Expanding the EGR System and Part Selection

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and require other parts from the same group, such as additional valves, hoses, or modules related to exhaust gas recirculation, check the available parts in the Mercedes EGR Valves and Parts category.

When selecting used EGR system components, it is advisable to consider structural compatibility and origin from the same engine family. Helpful tips for choosing original used parts can be found in the article: Best Used Car Parts – A Guide to the Most Frequently Chosen Original Parts.