BMW 3 Series E90 E92 E93 M3 Rear Left N/S Wheel Brake Disc 2283803

BMW 3 Series E90 E92 E93 M3 Rear Left N/S Wheel Brake Disc is an original BMW braking system component, designed for installation on the driver's side of the rear axle. Thanks to its factory M3 series origin, it ensures consistency with the suspension design and braking characteristics of these models, which translates into stable, predictable, and repeatable brake performance in daily use and during dynamic driving.

Specifications and technical data

• SKU: 2283803
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2283803
• Substitutable numbers: 34212283803, 2283803, 34212283387, 2283387
• Location on the vehicle: Rear, Left
• Category: Brake Disc Rotors

Purpose and fitment for BMW 3 Series M3

The presented rear left brake disc has been designed specifically for BMW 3 Series E90, E92, and E93 M3 models. This ensures a perfect fit for the factory caliper, hub, and brake dust shields on the rear left axle. Maintaining the original geometry and operating parameters is crucial for the even distribution of braking force between the right and left sides, which affects vehicle stability during hard braking and high-speed driving.

Technical and functional characteristics

As an element from the Brake discs category, this rear left disc is responsible for the efficient dissipation of thermal energy from the brake pads and maintaining the proper friction surface. The design chosen by BMW for the M3 version accounts for the specific loads resulting from a more powerful engine, stiffer suspension, and a sporty driving style. A correctly selected rear axle disc:

• ensures stable friction across the entire operating temperature range,
• reduces the risk of uneven pad wear,
• supports the operation of ABS and traction control systems,
• maintains the proper balance between the front and rear of the braking system.

The placement on the vehicle on the rear left side is important when selecting parts – using the correct disc on the appropriate side minimizes the risk of vibrations, runout, and improper pad contact.

Original origin and used condition

The disc comes from an original BMW braking system, which means it complies with the manufacturer's factory design standards. Unlike aftermarket replacements of inconsistent quality, the OEM component is designed for a specific model and engine version, taking into account vehicle weight, load distribution, and M3 suspension characteristics. The product is in used condition, which allows for an economical replacement while maintaining the original design specifications, provided that wear is properly assessed and installation is performed by an experienced service center.

Safe selection of used braking system components

When choosing a used brake disc, it is crucial to pay attention to compatibility with the body version, axle, and installation side, as well as matching it to existing calipers and hubs. Proper selection of braking components has a direct impact on braking distance, vehicle stability, and the operation of driver assistance systems. If you want to verify step-by-step what to look for when buying used discs, calipers, and ABS components, the following article will be helpful: Second-hand braking system: how to safely select discs, calipers, and ABS?.

Expansion and modernization of the BMW braking system

If you are planning a comprehensive repair or modernization of the braking zone in your BMW and need other elements from the same group, such as additional discs for other wheels, compatible pads, or supplementary brake lines, check the available parts in the BMW brake discs category.

For BMW owners who want to better understand the benefits of using original used components, including braking system elements, the following guide may also be useful: BMW – sports performance and precision. How do original used parts extend the life of the Bavarian icon?, which describes practical aspects of selecting parts by OEM numbers and the impact of such solutions on the durability and handling characteristics of the car.