Bosch 0 986 479 B72 Brake Disc

Overview of the Bosch 0 986 479 B72 Brake Disc

The Bosch 0 986 479 B72 is a high‑performance, ventilated rear brake disc designed for modern passenger cars. It delivers reliable stopping power while maintaining durability and heat dissipation under demanding driving conditions. This article explores every aspect of the disc—from its engineering specifications to real‑world performance benefits.

Key Technical Specifications

• Diameter: 314 mm (12.36 in)
• Thickness: 22 mm (0.87 in)
• Hole Diameter: 120 mm (4.72 in) – the central bore for mounting
• Ventilation Pattern: Multi‑channel, cross‑flow design to enhance cooling
• Material Composition: High‑strength cast iron with a proprietary alloy blend for improved thermal stability
• Weight: Approximately 1.8 kg (3.97 lb) per disc
• Compatibility: Designed to fit the rear axle of most Volkswagen, Audi, Skoda, and Seat models that use a 314 mm brake system; also suitable for other OEMs with matching mounting geometry.

Engineering Design Features

The Bosch 0 986 479 B72 incorporates several advanced design elements that set it apart from standard discs:

Ventilated Architecture

Its multi‑channel ventilation system creates a cross‑flow of air through the disc, effectively removing heat generated during braking. This reduces the risk of brake fade and extends component life.

Optimized Hole Pattern

The 120 mm central bore is engineered to balance structural rigidity with weight reduction. The hole spacing ensures even load distribution across the disc surface.

Heat‑Resistant Alloy

Bosch uses a proprietary cast iron alloy that maintains hardness at high temperatures, preventing warping and ensuring consistent braking performance during repeated stops.

Surface Finish

The disc’s outer rim features a smooth finish to promote optimal contact with brake pads. This design minimizes pad wear while maximizing friction coefficient.

Performance Benefits

• Consistent Braking: The ventilated design keeps the disc temperature stable, ensuring reliable stopping power even during aggressive driving or long descents.
• Reduced Wear: High‑strength material resists cracking and reduces pad wear, extending service intervals.
• Lightweight Construction: Lower unsprung mass improves handling dynamics and ride comfort.
• Durability: The disc’s robust alloy composition withstands harsh road conditions, including exposure to water, dust, and temperature extremes.

Installation Guidelines

Installing the Bosch 0 986 479 B72 is straightforward for technicians familiar with standard rear brake systems. Follow these steps:

1. Remove Existing Disc: Detach the caliper, slide out the old disc, and clean the mounting surface.
2. Inspect Caliper: Ensure pads are in good condition; replace if necessary.
3. Mount New Disc: Align the central bore with the hub, secure with the supplied bolts, and torque to manufacturer specifications.
4. Reinstall Caliper: Position the caliper over the new disc, ensuring pads sit flush against the rim.
5. Check Alignment: Verify that the disc is centered and rotates freely without wobble.
6. Test Braking: Perform a low‑speed brake test to confirm proper operation before resuming normal driving.

Maintenance Tips

• Inspect for cracks or scoring after every major service interval.
• Keep the disc surface clean; use a non‑abrasive cleaner to remove brake dust and debris.
• Avoid using abrasive pads that can damage the rim finish.
• Check bolt torque regularly, especially after heavy braking sessions or rough terrain driving.

Compatibility Summary

The disc is engineered for vehicles with a 314 mm rear brake system. Common models include:

• Volkswagen Passat (Mk6/7)
• Audi A4/A5 (B8/B9)
• Skoda Octavia
• Seat Leon
• Other OEMs with matching mounting geometry and hub dimensions.

Why Choose the Bosch 0 986 479 B72?

Choosing this disc means investing in:

• Proven Reliability: Backed by Bosch’s reputation for quality automotive components.
• Engineered Performance: Designed to meet or exceed OEM specifications.
• Longevity: Built to last through years of daily driving and occasional spirited use.
• Safety Assurance: Consistent braking performance reduces stopping distances and enhances overall vehicle safety.

Conclusion

The Bosch 0 986 479 B72 Brake Disc exemplifies the blend of advanced engineering, durable materials, and practical design that modern drivers expect. Whether you’re restoring a classic model or upgrading a contemporary sedan, this disc delivers dependable stopping power, heat management, and longevity—all essential for safe, confident driving.