Audi RS4 B8 Rear Windscreen Window Glass Wiper Arm 8K9955407

The Audi RS4 B8 Rear Windscreen Window Glass Wiper Arm is an original component from the Wiper arms group, designed for operation on the rear window. It ensures stable blade guidance, even pressure on the glass, and predictable wiper system performance in demanding weather conditions.

Specifications and technical data

• SKU: 8K9955407
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K9955407
• Substitutable numbers: 8K9955407, 8K9 955 407
• Location on the vehicle: Rear
• Category: Wiper Arms

Purpose and function in the wiper system

The rear wiper arm in the Audi RS4 B8 is responsible for precisely transferring motion from the drive mechanism to the wiper blade. A correctly selected and functional component:

• maintains constant, appropriate blade pressure against the glass surface,
• ensures smooth, repeatable operating motion,
• reduces vibration and noise during operation,
• improves visibility in the rearview mirror during rain and snow.

This allows the driver to maintain good rear visibility, which is important both when maneuvering and while driving in difficult conditions.

Original Audi component – fitment and compatibility

The presented wiper arm comes from the Audi range, which means it maintains factory geometry, the correct operating angle, and proper seating on the mechanism axis. The original design translates into:

• secure fitment to the rear window mount of the RS4 B8,
• proper cooperation with the wiper drive,
• preservation of the manufacturer-designed windshield cleaning zone.

As a result, the component can be used as a replacement for a damaged or worn arm without the need to modify other system components.

Performance characteristics and installation

The rear wiper arm is designed to operate in external conditions, taking into account mechanical loads and the influence of atmospheric factors. In practice, this means:

• stable blade guidance across the curved surface of the rear window,
• appropriate structural rigidity while maintaining the required flexibility of the blade mounting tip,
• ease of removal and installation during standard service procedures.

This type of component from the Wiper arms category is often chosen when replacing the entire rear wiper assembly – especially when the existing arm shows play, corrosion, or uneven pressure.

Product condition and service application

The offered component is in used condition, which allows for an economical repair of the wiper system while maintaining the manufacturer's original specifications. This type of part is suitable in situations where:

• mechanical damage to the arm has occurred (e.g., bending, cracking),
• there are problems with the wiper returning correctly to the rest position,
• it is necessary to replace the entire rear wiper assembly as part of broader bodywork service.

Choosing an original arm allows you to maintain the technical integrity of the vehicle and reduce the risk of fitment issues with the drive axis.

Expanding Audi rear bodywork service

If you are planning a comprehensive repair or upgrade of the rear window and body area in your Audi and need other elements from the same group, such as additional arms, mounts, or compatible blade holders, check out the available parts in the Audi Wiper arms category.

For users comparing service solutions across different brands and segments, a comparative article on BMW engines may also be helpful – you can find it here: BMW N47 vs M57 / M57N / M57N2 – ranking of legendary diesels.