Engine 642940 Mercedes ML W164 Bare Engine 642.940 OM642 70k miles, WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

The power unit was tested before removal and is in full working order.

Listing details

The offer applies to a bare engine.

The engine is sold without accessories (e.g. alternator, starter motor, manifolds, injectors, turbocharger, etc.).

Engine 642940 Mercedes ML W164 Bare Engine 642.940 OM642 70k miles, WARRANTY is a factory-spec, six-cylinder diesel short block designed for the Mercedes ML-Class W164 generation. This bare unit provides a solid foundation for professional repair or a complete powertrain rebuild, allowing you to maintain the original diesel engine performance characteristics and proper vehicle operating parameters.

Specifications and technical data

• SKU: A6420103102
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420103102
• Substitutable numbers: A6420103102, A 642 010 31 02, A6420106245, A 642 010 62 45, A6420107647, A 642 010 76 47, A6420101898, A 642 010 18 98
• Fuel type: Diesel
• Number of cylinders: 6
• Category: Engines
• Mileage: 70 000

Technical specifications of the OM642 unit

The presented short block belongs to the Mercedes OM642 V6 diesel engine family, widely used in premium class models. The six-cylinder design ensures smooth operation, good flexibility across the entire rev range, and a favorable power-to-fuel consumption ratio. The use of diesel fuel promotes economical operation while enabling high torque, which is essential for heavier vehicles such as the ML W164 SUV.

A bare short block means it serves as a base for further assembly of components according to the requirements of a specific vehicle configuration. This solution is particularly beneficial when existing components (e.g., fuel system, turbocharging, or auxiliary parts) remain in good working order and can be transferred to the new unit.

Application in Mercedes ML W164

The engine from the OM642 family was designed for operation in demanding conditions typical of SUVs – frequent loads, driving with cargo, towing trailers, and long highway mileages. In the Mercedes ML W164, this powertrain provides:

• stable power delivery across the full RPM range,
• adequate torque reserve under higher loads,
• consistency with the factory powertrain and vehicle electronics.

By maintaining the original engine architecture, it is possible to ensure proper compatibility with the stock transmission, cooling system, and control systems, which reduces the risk of compatibility issues after installation.

Benefits of choosing a used engine short block

Choosing a used short block from the OM642 family for the ML W164 is a solution that significantly reduces repair costs compared to purchasing a brand-new unit, while maintaining a high level of functionality. A used six-cylinder diesel engine is particularly attractive in situations where damage mainly affects the block, crankshaft, or cylinder heads, and other auxiliary components can be safely transferred.

To better understand the differences between new and used powertrains and to learn about selection procedures based on OEM and VIN numbers, it is worth reading the expert guide Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses the technical, economic, and practical aspects of such an investment in detail.

Professional selection and compatibility

To ensure the correct fitment of the short block to a specific version of the Mercedes ML W164, it is crucial to verify compatibility using OEM numbers and interchangeable part numbers. This helps avoid installation issues and ensures proper cooperation with existing components and vehicle electronics. During the selection process, it is also helpful to consider parameters such as fuel type or the number of cylinders, which allows for full consistency with the car's factory configuration.

If you want to deepen your knowledge on the flawless selection of used powertrain components and other car parts, the guide how to professionally select used car parts with consideration for OEM compatibility, which describes practical methods for verifying compatibility, will be useful.

Mercedes engines – expansion and powertrain modernization

If you are planning a comprehensive repair or modernization of the engine area in your Mercedes and need other components from the same group, such as blocks, heads, or complete short blocks, check out the available parts in the Mercedes Engines category.

Selecting the right short block for the ML W164 not only allows you to restore the vehicle's performance after a major failure but also serves as a starting point for further service work, such as component regeneration or optimization of engine operating parameters. Thanks to this, the Mercedes ML W164 can continue to meet the user's requirements in terms of dynamics, comfort, and durability, while maintaining rational operating costs.