Mercedes W203 Window Lifter Motor Drive Rear Door Right O/S A2038203042

The Mercedes W203 Rear Right Window Motor is an original part from the Window Regulators and Motors group, designed for the rear right window in Mercedes vehicles. It ensures stable operation of the window lifting and lowering mechanism, restoring full functionality to the factory comfort system.

Specifications and technical data

• SKU: A2038203042
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2038203042
• Substitutable numbers: A2038203042, A 203 820 30 42, A2037300246, A 203 730 02 46
• Location on the vehicle: Rear, Right
• Category: Window Motors & Regulators

Purpose and Function in the Vehicle

The window motor is dedicated for installation in the rear right door area, where it is responsible for driving the window lifting mechanism. As a component from the Window Regulators and Motors category, it works with the factory electrical system and comfort control, enabling smooth opening and closing of the window from the door switches or the driver's panel.

The placement on the vehicle type Rear, Right allows for precise fitting to the specific mounting position, which reduces the risk of issues with guide geometry or improper window sealing.

Benefits of Using an Original Motor

Using the factory window motor in a Mercedes W203 translates to:

• maintaining the correct window operating speed and smooth movement throughout its range,
• proper cooperation with control modules and comfort functions (e.g., control from the driver's panel),
• appropriate fit for door mountings and construction, without the need for installation modifications.

This allows the part to be used for both typical repairs after a window drive failure and for restoring full system functionality after mechanical door damage.

Installation Characteristics

The motor is prepared for operation within the factory door system of the Mercedes W203, which facilitates installation in place of a worn or damaged drive. The design intended for a specific side of the vehicle minimizes the risk of incorrect part selection and compatibility issues with the lift mechanism.

As a used part, it comes from disassembly, allowing for economical repair while maintaining the original manufacturer's specifications. This solution is particularly beneficial for servicing older models where a reasonable balance between cost and functionality is important.

Selection by Numbers and Vehicle Compatibility

The motor has an OEM part number and interchangeable numbers, which allows for precise verification of compatibility with the specific vehicle equipment version. When selecting, it is advisable to use the manufacturer's designations or catalog data to ensure the part will work with the existing lift mechanism and electrical system.

If you have doubts when choosing disassembled components, the procedures for selection by OEM numbers and the cost-effectiveness analysis of repairs described in the article: Why it's worth buying used gearboxes and engines – facts instead of myths may be helpful. Although it mainly concerns powertrains, the principles of verification and approach to used parts presented there are also useful when purchasing electrical components and accessories.

Expansion and Service of the Side Window Area in a Mercedes

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

This approach allows for the simultaneous renewal of several cooperating sub-assemblies, which reduces the risk of further failures and ensures consistent operation of the entire window lifting system in the vehicle.