Mercedes C253 X253 220 d Complete Engine 651921 651.921 170HP 39k, 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.

Mercedes C253 X253 220 d Complete Engine 651921 651.921 170HP 39k, WARRANTY is a complete powertrain from the Mercedes diesel engine family, designed for SUV/coupe models. This used unit from the OM651 series is a solution for users looking for a proven diesel engine with a modern design and optimized performance parameters. Thanks to its factory configuration, the engine allows for maintaining the vehicle's original characteristics and proper interaction with the car's electronics.

Specifications and technical data

• SKU: A6510107510-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510107510
• Substitutable numbers: A6510107510, A 651 010 75 10, A6510104514, A 651 010 45 14
• Fuel type: Diesel
• Number of cylinders: 4
• Category: Engines
• Engine code: 651921
• Mileage: 39 000

Technical characteristics of the powertrain

The presented engine belongs to the Engines category and was developed by the Mercedes brand as a modern, four-cylinder diesel unit. The use of a common rail injection system and turbocharging (a typical feature for this series) provides a favorable compromise between dynamics and fuel consumption. The four-cylinder in-line configuration helps reduce weight and simplifies maintenance compared to more complex systems.

The engine is adapted to run on diesel fuel, which allows for high torque at low and medium engine speeds. This characteristic is particularly beneficial in C253/X253 class vehicles, where flexibility in daily operation and stable performance under higher loads are important.

Application in Mercedes C253 / X253 220 d

The unit was designed to work with Mercedes powertrains in 220 d versions, which means it is matched to the factory mounts, accessories, and the vehicle's electrical architecture. As a result, installation is straightforward, and after proper selection based on the engine code and vehicle equipment, it is possible to maintain the original performance parameters.

The engine from this series performs well both in city driving and on the highway, offering stable operation and predictable response to load. For the user, this means the possibility of restoring the vehicle to full efficiency without the need for a costly replacement with a brand-new powertrain.

Benefits of choosing a used diesel engine

Purchasing a used Mercedes diesel engine is a solution that allows for significantly lower repair costs compared to a brand-new unit, while maintaining the original design and compatibility with the vehicle. In practice, this means:

• the ability to restore full vehicle functionality at a lower financial cost,
• maintaining the factory engine performance characteristics,
• compatibility with standard Mercedes control and diagnostic systems.

An additional advantage is the relatively low mileage for a diesel unit of this class, which translates into a potentially greater remaining service life. For workshops and individual users, this means greater predictability of the unit's future performance after proper installation and maintenance.

Selection by engine code and part numbers

To ensure proper compatibility, it is worth verifying the engine code and part numbers against the vehicle documentation or data read from the VIN before purchasing. This selection method minimizes the risk of accessory incompatibility, configuration differences, and problems during the first start-up after installation. In case of doubt, consulting a mechanic or a specialist dealing with Mercedes units who can confirm the correct fit is a good solution.

If you want to better understand how to safely choose used powertrains and what to pay attention to when verifying markings, the expert guide Why it is worth buying used gearboxes and engines – facts instead of myths, which describes the procedures for selection by VIN and OEM numbers and discusses the most common myths regarding used components, will be helpful.

Mercedes engines – expansion and modernization of the powertrain

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

For users analyzing the cost-effectiveness of investing in original, replacement, or used powertrain components, the cost and quality guide Original, replacement, or used – which car parts are the most cost-effective?, which compares various service strategies using aftermarket parts, may also be useful.