Mercedes W166 ML250 OM651 Automatic Gearbox 722908 722.908 1662706501 WARRANTY

Listing details

The gearboxes are sold with a 90-day warranty! They were tested before removal and are in full working order.

Mercedes W166 ML250 OM651 Automatic Gearbox 722908 722.908 1662706501 WARRANTY is a factory-original, used automatic transmission from the 722.9 family, designed for OM651 diesel units in the W166 ML-Class model. This is a solution for users expecting consistent integration with vehicle electronics, proper torque transfer, and the preservation of original gear-shifting characteristics.

Specifications and technical data

• SKU: A1662707501
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1662707501
• Substitutable numbers: A1662707501, A 166 270 75 01, 1662706501, 166 270 65 01
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Automatic Transmission

Purpose and technical specifications

The described gearbox belongs to the Automatic transmissions group used in Mercedes vehicles with the OM651 diesel engine in the W166 (ML250) body. The automatic design ensures smooth, predictable gear changes, optimized for the torque characteristics of a diesel engine. Using an original transmission from the same family as the factory-installed one minimizes the risk of mechanical and electronic compatibility issues.

This type of automatic transmission works with the vehicle's drivetrain control system, allowing for the maintenance of proper shift strategies, protective functions, and the driving comfort intended by the manufacturer. For vehicles operated with a trailer or in highway conditions, this is significant for the durability of the entire drivetrain.

Application in Mercedes W166 ML250 with diesel engine

The transmission has been designed to work with the OM651 diesel engine in the ML250 model, ensuring that the correct gear ratios are maintained in terms of vehicle weight, aerodynamics, and the engine's RPM range. In practice, this means predictable car behavior during acceleration, overtaking, and steady-speed driving.

Selecting a gearbox from the same family as the factory-installed one is particularly important for integration with safety and comfort systems, such as traction control systems or adaptive shift strategies. Using an original automatic transmission helps reduce the need for additional controller software modifications.

Benefits of installing a used automatic transmission

Choosing a used automatic transmission for the Mercedes W166 ML250 is a solution that allows for a significant reduction in repair costs compared to purchasing a brand-new component, while maintaining the original design and operating parameters. For workshops and users, this means the ability to restore full vehicle functionality within a reasonable budget.

A used automatic transmission is particularly attractive in situations where the existing transmission has suffered severe mechanical damage or an economically unviable failure. Using a complete unit from the same family allows for shorter vehicle downtime and simplifies the installation process.

To better understand the specifics of the secondary market and the principles of selecting such components, it is worth reading our expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths. The article discusses, among other things, issues of verifying compatibility via OEM numbers and the ratio of repair costs to vehicle value.

Selection, compatibility, and installation aspects

Before installing this gearbox, it is recommended to verify compatibility with the specific vehicle equipment version, particularly regarding fuel type, transmission type (automatic), and the generation of the transmission used. Matching it to the engine and drivetrain control system is crucial to avoid communication issues between controllers.

In workshop practice, it is also important to check whether the vehicle configuration (e.g., drivetrain variant) corresponds to the parameters of the offered gearbox. A correctly selected transmission allows for maintaining the consistency of the entire drivetrain operation, which translates into operating culture, fuel consumption, and the durability of other drivetrain components.

Expanding the scope of drivetrain repairs

If you are planning a comprehensive repair or upgrade of the drivetrain area in your Mercedes and need other elements from the same group, such as other automatic transmissions, complete gearbox replacement kits, or additional components working with the transmission, check the available parts in the Mercedes automatic transmissions category.

For those considering broader use of the secondary market for upgrades or repairs, a guide dedicated to purchasing used components may also be helpful: buying used car parts for tuning projects and repairs. It allows for better investment planning and avoiding common mistakes when choosing drivetrain elements.

Summary

Mercedes W166 ML250 OM651 Automatic Gearbox 722908 722.908 1662706501 WARRANTY is an original, used automatic transmission from the 722.9 family, designed to work with the diesel engine in the W166 ML-Class model. Using such a gearbox allows you to restore the proper operation of the drivetrain, maintain factory gear-shifting characteristics, and optimize repair costs compared to purchasing a new component.