Brake Disc Plate BMW F90 M5 Rear Left N/S Brake Protection Plate Cover 7991045

The BMW F90 M5 Rear Left Brake Disc Shield is an original brake system component, designed specifically for the demanding rear axle of this model. Its robust construction ensures stable protection of the brake disc against contaminants, and its precise fit for BMW guarantees proper interaction with other system components. Thanks to this part, you can ensure the braking system in your car operates in a controlled and predictable manner.

Specifications and technical data

• SKU: 7991045
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7991045
• Substitutable numbers: 7991045, 34217991045, KD
• Location on the vehicle: Rear, Left
• Category: Brake Disc Rotors

Purpose and Function of the Brake Disc Shield

The presented brake disc shield is dedicated to the rear left side of the BMW F90 M5 vehicle. Its purpose is to limit direct contact of the disc with water, mud, small stones, and other contaminants that can accelerate wear of friction elements. A correctly selected shield helps maintain stable operating conditions for the disc and pads, promoting even wear and predictable braking performance.

This component is particularly important in high-performance cars like the BMW M5, where the braking system operates under increased thermal and mechanical loads. The appropriate shield helps maintain cleanliness in the disc's working area, facilitating system servicing and diagnostics.

Construction, Fit, and Installation

The shield is designed as an original BMW part, which translates to a precise fit with the hub and brake disc on the rear left side. The mounting holes and edge shape are adapted to the suspension and brake geometry of the F90 M5, ensuring a predictable installation process for an experienced mechanic.

Key benefits of using a dedicated shield:

• maintaining the correct distance from the disc, minimizing the risk of rubbing,
• compatibility with the factory BMW M5 F90 braking system,
• preserving the factory airflow geometry around the disc.

As a result, the shield not only protects but also supports stable operating conditions for the braking system during everyday use and dynamic driving.

Characteristics of a Used Component

The offered brake disc shield is in used condition, meaning it comes from a dismantled vehicle and may show signs of normal use, such as discoloration or minor installation marks. At the same time, it is an original BMW component that retains its proper geometry and protective function, essential for the safe operation of the braking system.

Choosing an original used part is often a sensible compromise between quality and repair cost. It allows for maintaining the structural integrity of the braking system while limiting expenses compared to purchasing a new component.

Technical Support and Part Selection

When selecting a brake disc shield for the BMW F90 M5, it is crucial to pay attention to the mounting side and compatibility with the specific braking system version. Correctly matching the part to the rear left side of the vehicle minimizes the risk of installation problems and unwanted noises during driving. If in doubt, it is advisable to consult a mechanic or a specialist in BMW M model servicing.

If you are planning a comprehensive repair or upgrade of the braking area in your BMW and need other parts from the same group, such as discs, pads, or brake lines, check the available parts in the BMW Brake Discs category.

To better plan your service budget and make informed choices about used braking system components, it is worth familiarizing yourself with the practical tips in the article Brake Calipers Under the Microscope: How to Effectively Reduce Brake System Repair Costs by Choosing Proven Used Parts, which discusses, among other things, the safety and cost-effectiveness of using original used parts.