Description
BMW 5 6 Series E60 E63 545i 645Ci 550i Rear Wheel Brake Disc 345X24 is an original BMW brake system component, designed for installation on the rear axle in selected versions of the 5 and 6 Series. A used part from the brake discs segment allows for an economical yet technically sound repair of the brake system in premium cars. By maintaining the factory specifications, it ensures consistent operation with other brake components.
Specifications and technical data
- SKU: 6763827
- Mark: BMW (Genuine OE)
- Condition: Used
- OEM Part Number: 6763827
- Substitutable numbers: 34216763827, 6763827, BG
- Location on the vehicle: Rear
- Category: Brake Disc Rotors
Purpose and Compatibility
The presented rear brake disc is designed for BMW 5 Series E60 and 6 Series E63 models with gasoline engines, such as 545i, 645Ci, and 550i. The design adapted for rear axle installation ensures proper cooperation with factory calipers, pads, and braking assistance systems.
By maintaining the original geometry and operating parameters, the disc allows for the braking characteristics intended by the manufacturer to be preserved, which translates to vehicle stability and predictable behavior during intensive braking.
Construction and Operating Parameters
The brake disc with a working diameter of 345 mm and a thickness of 24 mm has been constructed for the high thermal loads typical of heavier, powerful BMW models. The applied diameter ensures a large friction surface, and the appropriate thickness supports efficient heat dissipation during repeated, strong braking.
These operating dimensions contribute to:
- stable friction between the pad and disc at higher speeds,
- maintaining consistent braking performance under highway load,
- increased resistance to overheating compared to smaller brake kits.
Application in the BMW Brake System
The original BMW rear brake disc is adapted for cooperation with the factory ABS system and driving stability systems. Maintaining the correct dimensions and construction of the disc is crucial for the proper operation of wheel speed sensors and algorithms controlling brake force distribution.
Choosing an original disc from this series allows for:
- maintaining the factory braking balance between the front and rear axles,
- preserving the manufacturer’s intended operating characteristics of safety systems,
- minimizing the risk of vibrations and uneven pad wear with proper installation.
Condition, Origin, and Benefits of Choosing a Used OEM Disc
The offered BMW rear brake disc is a used part from disassembly, which significantly reduces the repair cost compared to a new OEM component. At the same time, you retain the key advantage of factory fitment for a specific BMW platform, without compromising on geometry or mounting method.
Choosing a used OEM disc is a particularly beneficial solution when:
- you are restoring a complete brake system in a car used daily,
- you are looking for a part that matches factory specifications without the need for aftermarket replacements,
- you want to maintain the technical consistency of the entire BMW brake system.
How to Safely Select a Used Brake Disc?
When selecting a used brake disc, it is crucial to verify compatibility with the specific engine and body version and to check if the dimensional parameters meet factory requirements. It is also worth paying attention to the condition of the working surface and its compatibility with currently used brake pads.
If you want to learn a detailed list of steps to take before purchasing used brake components, consult the guide: Second-hand brake system – how to safely choose discs, calipers, and ABS?. This is a practical checklist that helps you consciously assess the condition and usability of used components.
Other BMW Brake Discs
If you are also looking for other BMW brake discs for your car, check out our dedicated offer: BMW brake discs. Thanks to filters by model and engine version, you can easily select components tailored to a specific vehicle.
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