BMW X1 U11 U12 Front Windscreen Window Wiper Arm Passenger's Side N/S 9478857

BMW X1 U11 U12 Front Windscreen Window Wiper Arm Passenger's Side N/S is an original component from the Wiper arms group, designed specifically for operation on the front windshield. The precise geometry of the arm ensures stable pressure of the blade against the glass, which translates into a clear field of vision and safe driving in varied weather conditions.

Specifications and technical data

• SKU: 9478857
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9478857
• Substitutable numbers: 9478857, 61619478857
• Location on the vehicle: Front
• Category: Wiper Arms

Purpose and fitment for BMW X1 U11/U12

The component has been developed for the BMW X1 U11/U12 generation, taking into account the characteristic line of the windshield and the design of the passenger-side mount. As a result, the arm works with the wiper mechanism in a predictable manner, without collision with the hood, pillars, or seals, while maintaining the factory range of motion and operational smoothness.

The placement on the vehicle is the front passenger side, which means the arm is responsible for effectively cleaning the part of the windshield that is crucial for both the driver and the passenger in daily use.

Wiper arm construction

The wiper arm is designed as a rigid yet appropriately flexible component that transfers force from the drive mechanism to the wiper blade. The properly selected profile ensures:

• stable guidance of the blade across the windshield surface,
• even pressure distribution along the entire working length,
• reduction of vibrations and noise during operation in rain or at higher speeds.

As a part from the Wiper arms group, the component works with a dedicated mount on the mechanism spindle, which facilitates installation and removal during service work.

Operational characteristics and installation

The arm is intended for operation on the front windshield, in the standard wiper system used in the BMW X1 U11/U12. The design provides for the correct setting of the operating angle relative to the glass, which minimizes the risk of streaks and uncleared zones. The product is in used condition, which in practice means that before installation, it is worth visually verifying the working surface and the mounting socket to ensure trouble-free operation.

During installation, it is important to correctly set the resting position of the arm and properly tighten the mount on the spindle so as to maintain the factory operating geometry and avoid collisions with seals or the edge of the windshield.

Benefits of using an original wiper arm

Using a dedicated passenger-side arm in the BMW X1 U11/U12 allows for consistency with the factory wiper system design. The main advantages include:

• secure fit to the windshield – in accordance with the vehicle manufacturer's specifications,
• stable operation across the full range of motion,
• compatibility with standard blades intended for this model,
• maintaining the aesthetics and body lines characteristic of the BMW X1.

Expanding windshield area service

If you are planning a comprehensive repair or upgrade of the windshield area in your BMW and need other components from the same group, such as additional arms, mounts, or elements working with blades, check the available parts in the BMW Wiper arms category.

For drivers operating diesel-powered cars who are simultaneously diagnosing the operation of the power unit, an article discussing the symptoms and effects of injector failures may be helpful – more information can be found in the material on diesel injector failures, their recognition, and the consequences of neglect.