Mercedes Benz ML W163 Rear Left Quarter N/S Window Motor Valve A1638201342

Mercedes Benz ML W163 Rear Left Quarter N/S Window Motor Valve is a precision component from the Window regulators and motors group, designed to operate the rear left quarter window. It ensures stable operation of the window lifting and lowering mechanism, which translates into user convenience and proper functioning of the cabin ventilation system.

Specifications and technical data

• SKU: A1638201342
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1638201342
• Substitutable numbers: A1638201342, A 163 820 13 42, BG
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Purpose and vehicle placement

The presented window motor is intended for installation in the rear left part of the body, in the side window area. It is responsible for driving the window lifting mechanism, working in conjunction with the factory window regulator. This placement allows for the direct restoration of the specific window control point's functionality without interfering with other doors or the electrical installation.

Thanks to its dedicated application in the Mercedes ML-Class W163 generation, the component maintains the correct mounting points and fitment for the factory wiring harness, which facilitates installation and reduces the risk of operational issues.

Function and benefits of installation

The window motor is responsible for converting the electrical signal from the switch into a smooth movement of the window lifting mechanism. A properly functioning drive ensures:

• efficient opening and closing of the rear left window,
• stable operation throughout the full range of motion,
• maintenance of acoustic comfort and cabin sealing,
• proper cooperation with factory comfort control modules.

Replacing a damaged drive with an original component from the same design group allows for the restoration of functionality without the need for installation modifications or mechanical alterations. This is a practical solution for common faults, such as the window stopping halfway or a complete lack of response to control buttons.

Product characteristics and fitment

The rear left window motor for the Mercedes ML W163 comes from the Window regulators and motors group, meaning it has been designed to work with the factory rail and cable mechanism in the door. The construction is intended for operation in conditions of variable temperature and humidity, typical for the interior of car doors.

As a Mercedes brand part, the component maintains the proper manufacturing standards and mounting geometry, which translates into correct fitment with the door panel, rails, and seals. As a result, the installation can be carried out in an orderly manner, maintaining the factory geometry of the window relative to the door frame.

Condition and service application

The offered window motor is a used component, making it a reasonable choice for maintenance repairs in older ML W163 models, where a balance between cost and functionality is important. This type of part is suitable both for the immediate replacement of a damaged drive and for broader service work involving the regeneration of the window lifting mechanism.

In practice, installing such a component allows for reducing vehicle downtime in the workshop and restoring full operation of the rear left window without the need to invest in a complete door set.

Knowledge expansion and part selection

If you are planning a comprehensive repair or upgrade of the side window area in your Mercedes and need other elements from the same group, such as drives, rail mechanisms, or control modules, check the available parts in the Mercedes window regulators and motors category.

When planning broader service work, it is also worth knowing the typical weak design points of various models. A practical guide regarding engine units may be helpful, available in the article BMW E90 engine failures: check what can ruin your budget!, which shows how to consciously approach the operation and repair of premium class cars.