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This guide is for owners of BMW 535 E28 3.4 models (1985-1987) seeking high-quality front brake disc replacements. The key benefit is enhanced braking performance and durability due to their high-carbon construction and vented design. A caveat is that professional installation is recommended due to the critical nature of brake components. This set includes two vented brake discs with specific dimensions (282mm outer diameter, 25mm thickness) designed for a direct fit, meeting ECE-R90 standards for safety and performance.
| Model Part Number | 0986478217 |
|---|---|
| Brand | Bosch |
Vented brake discs have internal vanes that allow air to flow through them, which helps to dissipate heat more effectively. This reduces the risk of brake fade during heavy or prolonged braking.
The oil coating is a protective layer to prevent rust and corrosion during shipping and storage. It must be thoroughly cleaned off with a brake cleaner before installation for proper braking performance.
Yes, they are designed as a direct replacement for the front axle of BMW 535 E28 3.4 models manufactured between 1985 and 1987, matching the specified dimensions and bolt patterns.
ECE-R90 is a European standard that ensures replacement brake components meet or exceed the performance and safety specifications of the original equipment parts.
While possible for experienced DIYers, brake system work is critical for safety. Professional installation by a qualified mechanic is strongly recommended to ensure correct fitment and function.
The discs have an outer diameter of 282 mm, a thickness of 25 mm, a minimum thickness of 23.4 mm, a bolt hole circle diameter of 120 mm, and a centering diameter of 79 mm.
The minimum thickness specified for these brake discs is 23.4 mm. It is important to replace them if they wear down to or below this thickness.
This could indicate warped rotors, improperly installed discs, or uneven lug nut torque. Ensure discs are properly seated and torqued. If vibration persists, have the system professionally inspected.
May indicate worn brake pads, debris between pad and rotor, or improper bedding. Inspect brake pads for wear and consider if the rotors need further bedding or if there's contamination.
Check brake fluid level and condition. Ensure the protective oil has been completely removed from the new discs. Inspect brake pads for wear or glazing. Professional inspection is advised.
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