Mercedes W166 Window Lifter Regulator Rear Left N/S Motor Panel A1669060501

The Mercedes W166 Rear Left Window Motor is an original part from the Window Regulators and Motors group, designed for the rear left window in the W166 body style. This solution allows you to restore the proper operation of the window lifting and lowering mechanism, ensuring stable, predictable performance of your Mercedes' electrical system.

Specifications and technical data

• SKU: A1669060501
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1669060501
• Substitutable numbers: A1669060501, A 166 906 05 01
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Vehicle Application and Function

The window motor used in the W166 model is responsible for driving the lifting mechanism of the rear left window. Its placement in the Rear, Left zone means it is installed in the rear driver's side door, which is crucial for selecting parts that are compatible with the body and electrical system.

This component works with the factory window control system, ensuring smooth opening and closing of the window from the door panel or central console. This maintains the full functionality of comfortable window control and proper protection of the interior from noise and weather conditions.

Benefits of Using an Original Window Motor

Using an original motor in a Mercedes W166 helps maintain the integrity of the entire door electrical system. In practice, this means:

• correct fit with the factory window lifting mechanism,
• stable cooperation with comfort control modules,
• adherence to manufacturer-specified operating parameters,
• reduced risk of improper window closing or jamming.

For the user, this translates to trouble-free operation and no need for installation modifications or adapters.

Mounting Characteristics and Fitment

The motor is structurally designed for installation in the factory mounting points in the W166 rear left door. The appropriate shape of the housing and electrical connector allows for a near plug-and-play installation, without altering the door's structure.

When selecting a part, it is worth paying attention to:

• compatibility with the W166 body style,
• vehicle placement (rear, left side),
• belonging to the Window Regulators and Motors category, which facilitates searching for parts with similar purposes.

Condition and Practical Application

The offered window motor is a used part, allowing for an economical repair of the window lifting system while maintaining the original construction. This solution is particularly beneficial in case of a single drive failure, when other door components remain functional.

Replacing a damaged motor with a functional part of this type is recommended when symptoms such as the window stopping halfway, no response to control buttons, or uneven mechanism operation occur.

Selection by OEM and Expert Knowledge

When selecting components such as window motors, gearboxes, or drive units, it is crucial to use manufacturer markings and vehicle data. Proper matching by OEM numbers and VIN minimizes the risk of purchasing an incompatible part and speeds up the repair process. If you want to better understand how to safely choose used components, read the guide Why Buy Used Gearboxes and Engines – Facts Instead of Myths, which discusses practical selection procedures by numbers and real cost savings.

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other parts from the same group, such as window drives, lifting mechanisms, or control modules, check the available parts in the Mercedes Window Regulators and Motors category.