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This guide is for vehicle owners and mechanics looking for high-quality replacement rear brake discs. The key benefit is enhanced braking performance and durability thanks to their vented design and ECE-R90 compliance. A potential caveat is the need for professional installation to ensure correct fitment and safety. These Bosch brake discs are designed for the rear axle, featuring a vented rotor construction, a 330mm outer diameter, and a 20mm thickness, with specific measurements for hub and bolt holes ensuring precise fitting. The surface coating offers initial protection, and the high-carbon machining contributes to longevity and heat dissipation.
| Model Part Number | 0 986 479 727 |
|---|---|
| Brand | Bosch |
No, these discs have specific dimensions (330mm diameter, 20mm thickness, etc.) and are designed for particular vehicle models. Always confirm compatibility with your vehicle's specifications before purchase.
ECE-R90 is a European standard that certifies brake discs and pads perform equivalently to original equipment manufacturer (OEM) parts in terms of safety, performance, and durability.
Generally, this involves a series of moderate stops from medium speeds, followed by periods of cooling without coming to a complete stop. Consult the specific instructions provided by the brake pad manufacturer for the best results.
While technically possible, brake system components are critical safety parts. Professional installation by a qualified mechanic is strongly recommended to ensure correct fitment, safety, and optimal performance.
Vented brake discs have internal channels that allow air to flow through them. This significantly improves heat dissipation, which helps prevent brake fade and maintain consistent braking performance, especially under heavy use.
The lifespan depends on driving conditions, driving style, and maintenance. However, the high-carbon machining and quality construction of Bosch discs generally contribute to a longer service life compared to standard discs.
It is highly recommended to replace brake pads whenever you replace brake discs. This ensures even wear patterns and optimal braking performance. Mixing old pads with new discs can lead to reduced effectiveness and premature wear.
This can be caused by uneven rotor surface or improper installation. Ensure discs are properly seated and torqued. Check for contamination on the mounting surface. If persistent, the discs may require resurfacing or replacement.
May indicate worn brake pads, debris between pad and rotor, or improper pad/rotor bedding. Inspect pads for wear and replace if necessary. Ensure pads are correctly seated. Re-perform bedding-in procedure.
Check brake fluid level and condition. Ensure brake pads are not worn below minimum thickness. Verify no air is in the brake lines. Inspect discs for excessive wear or damage.
A thin layer of rust on new, coated discs is normal due to storage and moisture. This should dissipate after the initial bedding-in period and normal driving.
Compatibility: Before purchasing, verify that the dimensions (330mm outer diameter, 20mm thickness, 5x120mm bolt hole circle, 75mm centering diameter) and the specific part number (Bosch 0 986 479 727) match your vehicle's requirements. Consult your vehicle's manual or a professional mechanic if unsure.
Setup: Installation of brake discs should always be performed by a qualified mechanic. This ensures correct mounting, proper torque settings for bolts, and correct alignment with the brake caliper and pads. It is recommended to replace brake pads simultaneously with the discs for optimal performance and even wear.
Care: After installation, follow the manufacturer's recommended bedding-in procedure for the new brake discs and pads. This typically involves a series of moderate stops to ensure even transfer of pad material onto the disc surface, maximizing performance and longevity. Avoid aggressive braking during the initial period. Regular checks for excessive dust, corrosion, or unusual noises during routine vehicle maintenance are advised.
