BMW G31 Touring Rear Window Glass Wiper Arm 7403857

BMW G31 Touring Rear Window Glass Wiper Arm is an original component from the Wiper arms group, designed for operation on the rear window of the estate body style. It ensures stable guidance of the wiper blade, which translates into a clear field of vision and safe vehicle operation in various weather conditions. A used OEM component is a sensible choice for drivers looking for a factory fit without the need to invest in a new part.

Specifications and technical data

• SKU: 7403857
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7403857
• Substitutable numbers: 7403857, 61627403857
• Location on the vehicle: Rear
• Part type: Wiper Arm
• Category: Wiper Arms

Purpose and technical function

The rear window wiper arm in the BMW G31 Touring is responsible for precisely pressing the blade against the glass surface at the rear of the vehicle. Its placement on the rear of the body allows for effective removal of water, mud, and dirt from the tailgate window, which is particularly important in Touring-type cars, where rear visibility is crucial when maneuvering and driving in urban traffic.

Thanks to a design compliant with the manufacturer's standards, the arm works with the factory wiper mechanism, maintaining the correct operating geometry, tilt angle, and wiping range. This helps avoid problems typical of aftermarket replacements, such as uneven blade contact or excessive vibration during operation.

Benefits of using an original wiper arm

Using an original arm in the BMW G31 Touring provides a number of practical benefits:

• factory fit for the tailgate mounting, without the need for modifications,
• correct guidance of the blade across the glass surface, in accordance with the manufacturer's specifications,
• stable operation throughout the full range of motion, reducing noise and vibration,
• consistent exterior appearance with other body components.

For the user, this means trouble-free installation and the preservation of the original operating characteristics of the wiper system, which is important for both driving comfort and safety.

Installation and operational characteristics

The rear window wiper arm designed for the BMW G31 Touring is engineered to work in a demanding external environment – it is exposed to moisture, temperature changes, and chemical agents. The original construction ensures adequate rigidity and proper blade pressure, which reduces the risk of blind spots on the glass.

A used OEM element is a good compromise between cost and quality – you maintain factory specifications and compatibility while optimizing your repair budget. In practice, this translates into longer, stable operation of the wiper system with proper maintenance and regular replacement of the blade itself.

Application in the BMW rear wiper system

In the Touring body style, the rear wiper system is particularly important due to the larger glass surface and intense dirt generated by the airflow behind the vehicle. The rear window wiper arm in the BMW G31 is part of a complete system responsible for maintaining the clarity of the tailgate window, supporting the operation of parking sensors, the reversing camera, and exterior mirrors.

Choosing an original arm from the Wiper arms category allows you to maintain the consistency of the entire system, which is important when servicing premium-class cars, where precision of workmanship and predictable component behavior over a long period of use are paramount.

Service expansion and additional information

If you are planning a comprehensive repair or upgrade of the rear window visibility zone in your BMW and need other elements from the same group, such as additional arms, mounts, or compatible wiper system components, check the available parts in the BMW Wiper arms category.

If you want to better understand why used OEM components for premium brands currently represent a rational service choice and how the situation in the new parts market affects this, it is worth reading the article: Crisis in the new parts market? Why in 2026 used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend.