Audi A5 8T Rear Window Lifter Regulator Mechanism Motor Right O/S 8F0839398D

Audi A5 8T Rear Window Lifter Regulator Mechanism Motor Right O/S is an original component from the Window regulators and motors group, designed for precise operation in the rear right window of your Audi. Thanks to its factory design, it ensures proper window guidance, stable operation, and correct integration with the vehicle's electrical system, which translates into comfort during daily use.

Specifications and technical data

• SKU: 8F0839398D
• Mark: Audi
• Condition: Used
• OEM Part Number: 8F0839398D
• Substitutable numbers: 8F0839398D, 8F0 839 398 D
• Location on the vehicle: Rear, Right
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The presented mechanism is dedicated to installation in the rear right window area of the Audi A5 8T body. It is responsible for:

• stable window guidance in the tracks during raising and lowering,
• transferring drive from the electric motor to the window,
• maintaining the correct operating geometry of the window in the rear right door.

Such precise fitment to the specific mounting location reduces the risk of play, jamming, and uneven operation, which is particularly important when the rear windows are used frequently, e.g., in family or fleet vehicles.

Construction and fitment for Audi

The window regulator mechanism has been designed in accordance with Audi's construction requirements, which means maintaining the correct mounting points, arm kinematics, and compatibility with the factory window motor. As a result:

• it fits the original mounting holes in the door,
• it works with factory connectors and equipment,
• it maintains the window travel range intended by the manufacturer.

This solution facilitates installation and allows for consistency with other window system components, without the need for modifications or adaptations.

Condition, verification, and application

The item comes from the used Audi parts segment, which allows you to combine reasonable cost with the preservation of the original design. This type of component is particularly recommended in situations where:

• mechanical damage to the regulator has occurred (e.g., after a collision or seizure),
• there are problems with smooth window movement,
• it is necessary to replace the complete mechanism instead of repairing individual parts.

Selection in accordance with the manufacturer's markings allows for maintaining compatibility with the Audi A5 8T body and factory window controls.

Benefits of using an original mechanism

Using an original window regulator mechanism in an Audi A5 8T brings a number of practical benefits:

• Factory fitment – maintaining the window operating geometry and mounting points intended by the manufacturer.
• Stable system operation – reducing the risk of jamming, cable skipping, or uneven lifting.
• Consistency with the electrical system – correct cooperation with original window controls and overload protection.

This solution is especially recommended for repairs where maintaining original performance parameters and vehicle comfort is a priority.

Audi window regulators and motors – expansion and repairs

If you are planning a comprehensive repair or upgrade of the door and window area in your Audi and need other elements from the same group, such as guides, complete mechanisms, or window drives, check the available parts in the Audi window regulators and motors category.

Part selection and manufacturer markings

When selecting a window regulator mechanism for an Audi A5 8T, it is crucial to compare the manufacturer's markings and the location on the vehicle. Proper fitment helps avoid installation problems and guarantees correct cooperation with other door components. In case of doubts regarding the interpretation of OEM markings or reference numbers, the selection procedures used for other subassemblies, such as engines or transmissions – described in more detail in the guide Why it is worth buying used gearboxes and engines – facts instead of myths – may be helpful.