Bosch 0986479B31 Brake Disc

Bosch 0986479B31 Brake Disc

The Bosch 0986479B31 Brake Disc is a high‑performance braking component designed for rear wheels of a wide range of European passenger cars, particularly those from the Alfa Romeo, Fiat, and Lancia families. This disc is engineered to deliver reliable stopping power under a variety of driving conditions while maintaining durability and ease of installation.

Key Technical Specifications

• Model Number: 0986479B31 (also referenced as 0 986 479 B31)
• Diameter: 252 mm (10 inches) – a standard size for many mid‑size vehicles.
• Thickness: 10 mm – providing a robust structure that resists warping and maintains consistent braking performance.
• Material Composition: High‑grade cast iron with a reinforced core, offering excellent heat dissipation and resistance to brake fade.
• Drilling Pattern: 98 mm central hole diameter; the disc features a series of evenly spaced holes that enhance airflow, reduce heat buildup, and improve overall braking efficiency.
• Compatibility: Designed for rear wheels on models such as Alfa Romeo 147, 156, 164, 168, Croma, Delta I, Thema, Lybra; Fiat 154, 155, 166, 170, 180; and Lancia 147, 156, 164, 168.

Design Features and Performance Benefits

The Bosch 0986479B31 Brake Disc incorporates several engineering features that set it apart from standard aftermarket discs:

1. Optimized Heat Management: The drilled design allows for efficient airflow, preventing excessive heat buildup during prolonged braking. This reduces the risk of brake fade and extends component life.
2. Consistent Friction Surface: The cast‑iron construction provides a uniform friction surface that works harmoniously with Bosch BP302 pad sets, ensuring predictable stopping distances.
3. Precision Manufacturing: Each disc is machined to tight tolerances, guaranteeing proper fitment and alignment with the vehicle’s brake calipers. This precision minimizes vibration and noise during operation.
4. Durability Under Stress: The robust material composition resists cracking and wear even under high‑temperature conditions, making it suitable for both daily driving and spirited performance use.

Installation Overview

Installing the Bosch 0986479B31 Brake Disc is straightforward for technicians familiar with rear brake systems. The process typically involves:

1. Removing the existing disc and caliper assembly.
2. Cleaning the hub surface to ensure a smooth mounting interface.
3. Aligning the new disc with the hub and securing it using the supplied bolts.
4. Reinstalling the caliper, ensuring proper pad contact and adjusting the caliper piston if necessary.
5. Performing a brake fluid bleed to eliminate air from the system before testing.

Because the disc is designed for OEM compatibility, no additional modifications are usually required. However, it is recommended to pair the new disc with matching Bosch BP302 brake pads for optimal performance and longevity.

Applications Across Vehicle Models

The Bosch 0986479B31 Brake Disc serves a broad spectrum of vehicles. Below are some representative models that benefit from this component:

• Alfa Romeo: 147, 156, 164, 168, Croma, Delta I, Thema, Lybra.
• Fiat: 154, 155, 166, 170, 180.
• Lancia: 147, 156, 164, 168.

These vehicles span a range of years from the late 1980s through the early 2000s, reflecting the disc’s versatility across multiple generations and trim levels.

Maintenance Tips for Longevity

• Regularly inspect brake pads for wear; replace them before they become excessively thin.
• Keep the braking system clean from dust, grit, and debris to prevent uneven pad wear.
• Check for any signs of disc warping or cracking after heavy use or high‑speed driving sessions.
• Ensure that brake fluid is fresh and at the correct level; contaminated fluid can compromise disc performance.

Why Choose Bosch?

Bosch has long been a trusted name in automotive components, renowned for its commitment to quality, safety, and innovation. The 0986479B31 Brake Disc reflects this heritage through:

• Rigorous testing protocols that mimic real‑world driving stresses.
• Use of premium materials sourced from reputable suppliers.
• A design philosophy centered on user safety and vehicle performance.

Conclusion

The Bosch 0986479B31 Brake Disc is a meticulously engineered component that delivers dependable braking performance across a wide array of European vehicles. Its combination of robust construction, optimized heat dissipation, and OEM compatibility makes it an excellent choice for drivers seeking to maintain or enhance their vehicle’s safety profile.

Whether you are restoring a classic Alfa Romeo, upgrading the brakes on a Fiat Lancia crossover, or simply replacing worn components, this Bosch disc offers the reliability and performance that discerning motorists expect from a leading automotive brand.