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

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

The warranty covers the engine itself; engine accessories are covered by a 30-day warranty.

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

Listing details

The offer applies to a complete engine.

The engine comes from a right-hand drive (RHD) vehicle. The wiring harness is not compatible with left-hand drive (LHD) vehicles and requires replacement or modification.

Engine 642940 Mercedes ML W164 Complete Engine 642.940 OM642 70k miles, WARRANTY is a complete powertrain unit from the V6 diesel engine family, designed for the Mercedes ML-Class W164 generation models. A used engine from this series is a solution for those looking for a technically advanced yet proven power unit that allows for restoring the vehicle to full operational efficiency. Thanks to its six-cylinder design and modern diesel fuel supply system, the OM642 engine ensures proper refinement and solid performance in everyday use.

Specifications and technical data

• SKU: A6420103102-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420103102
• Substitutable numbers: A6420103102, A 642 010 31 02
• Fuel type: Diesel
• Number of cylinders: 6
• Category: Engines
• Mileage: 70 000

Technical characteristics of the OM642 unit

The OM642 engine used in the Mercedes ML W164 belongs to a group of modern diesel units designed to combine efficiency with reasonable fuel consumption. The configuration based on six cylinders promotes smooth operation and a stable torque curve, which translates into predictable vehicle behavior both in city traffic and during highway driving.

The diesel nature of the unit means the use of a diesel fuel supply system, which in practice provides good flexibility at low and medium RPMs. The Diesel fuel type is particularly beneficial for drivers covering longer distances, where economy and sufficient power reserves for towing or driving with a load are important.

Purpose and application in the Mercedes ML W164

The offered engine was designed as a power unit for the Mercedes ML W164 SUV, where it is responsible for efficiently transferring power to the vehicle's drivetrain. The OM642 design works well with the automatic transmissions used in this generation, ensuring smooth acceleration and comfortable driving in various road conditions.

This unit will work well both as a replacement in the event of a serious failure of the existing engine and for comprehensive vehicle restoration after mechanical damage. The engine mileage allows for assessing its degree of wear and planning any necessary service activities before installation, such as replacing consumables or checking accessories.

Condition, origin, and benefits of purchasing a used engine

The power unit is offered as a used engine, which allows for significantly reducing repair costs compared to purchasing a brand-new assembly. This type of solution is often chosen by workshops specializing in the Mercedes brand and by informed users who want to restore the car to full efficiency while maintaining a reasonable budget.

The engine from the OM642 family, with proper service maintenance, is known for good durability and stable operating parameters. Combined with proper diagnostics before installation and the replacement of key operating fluids, purchasing a used unit can be an effective way to use the vehicle long-term without the need to invest in expensive regeneration of an old engine.

Why choose Mercedes OM642 engines

Choosing this unit from the Engines category is a solution for those who expect stable operation, proper dynamics, and predictable operating costs from their SUV. Mercedes V6 diesel engines are valued for their refinement, good torque characteristics, and the ability to cover long distances comfortably.

An additional advantage is the wide availability of service knowledge and the experience of workshops in servicing the OM642, which facilitates both installation and subsequent maintenance. The well-thought-out design of this unit makes it a popular choice as a base for post-accident repairs, overhauls, or replacements in case of serious mechanical damage.

Service recommendations and technical knowledge

When installing a used diesel engine, it is worth paying special attention to the fuel system, the tightness of the installation, and the correct control configuration. In the case of diesel units, it is also crucial to monitor the operation of the injectors, turbocharger, and lubrication system to avoid secondary damage after replacement.

If you want to expand your knowledge about common problems with power units in popular models, an article describing critical designs in another premium car might be helpful – check out the analysis of faulty BMW E90 engines to better understand what to look for when choosing a used engine.

In the case of diesel engines, diagnostics of the injection system are also particularly important. If you want to learn what symptoms may indicate problems with injectors and what the consequences of neglecting them are, it is worth reading the guide: diesel injector faults – symptoms and effects.

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