Brake Disc BMW E81 E87 E90 E91 Rear Left Right Wheel Ventilated Disc 300X20

Brake Disc BMW E81 E87 E90 E91 Rear Left Right Wheel Ventilated Disc 300X20 is an original braking system component designed for the rear axle, prepared for installation on either the right or left side. Thanks to its ventilated design, it ensures stable heat dissipation and supports consistent brake performance under typical operating conditions. This is a solution for users seeking factory fitment and predictable braking system performance in their BMW.

Specifications and technical data

• SKU: 6864901-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6864901
• Substitutable numbers: 34216864901, 6864901, 34216855008, 6855008, 34216764653, 6764653, BG
• Location on the vehicle: Rear, Right, Left
• Category: Brake Disc Rotors

Purpose and BMW fitment

The presented rear ventilated brake disc has been designed for selected BMW E-series models, including estate and convertible body styles. The placement on the vehicle covers the rear axle on both the right and left sides, which facilitates the selection of the correct configuration when replacing a pair of discs. Using an original BMW solution helps maintain the proper geometry of the braking system, correct interaction with calipers, and the stock ABS system.

Technical characteristics and design

The ventilated structure of the disc promotes effective heat dissipation during more intensive braking, which reduces the risk of overheating and loss of braking efficiency. The design is adapted to the stock calipers used in the given system, ensuring the appropriate friction surface and compatibility with standard brake pads. The disc belongs to the Brake discs category, which clearly defines its function in the vehicle and facilitates selection within the same component group.

Component condition and service application

The offered disc is a used part, making it a solution for users looking for parts on a reasonable budget while maintaining the manufacturer's original specifications. It can be used both for standard replacement of worn components and for staged braking system restoration, where consistency with factory BMW solutions is a priority. Proper installation and inspection of the condition of the cooperating pads and calipers allow for predictable, repeatable brake performance.

Benefits of using an original BMW disc

Using an original BMW rear ventilated brake disc translates into several practical benefits:

• maintaining the factory braking character and proper pedal force modulation,
• secure fitment to the hub and stock calipers, without the need for modifications,
• consistency with the operating parameters of assistance systems, such as ABS or traction control,
• possibility of replacement in pairs on the axle, which promotes even wear and vehicle stability during braking.

For users planning to service the braking system in their BMW, choosing an original disc from this group allows for maintaining predictable car behavior in daily operation.

Service expansion and selection of other elements

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

When selecting used braking system components, it is worth following a proven procedure for verifying condition and compatibility. Detailed tips on how to safely choose discs, calipers, and ABS components in stores offering second-hand parts can be found in the article: Second-hand braking system: how to safely select discs, calipers, and ABS?