DuraGo BR900984 Disc Brake Rotor - Rear

Overview of DuraGo BR900984 Disc Brake Rotor

The DuraGo BR900984 disc brake rotor is engineered for reliable braking performance on select BMW models. Designed with a composite construction featuring a cast iron braking surface and an aluminum hat, this rotor balances durability and weight savings for improved vehicle handling.

• Composite construction with cast iron friction surface and aluminum hat
• Vented rotor design for enhanced heat dissipation
• Nominal thickness of 0.79 inches (20 mm) with discard thickness at 0.72 inches (18.4 mm)
• Overall diameter of 12.99 inches (330 mm) suitable for specific BMW 5 Series models
• Five mounting bolt holes with a 4.72 inch (120 mm) bolt circle diameter
• Non-directional brake surface for flexible installation
• Conventional drum-in-hat type rotor without ABS tone ring

Detailed Product Description

The DuraGo BR900984 rotor is designed specifically for BMW 528i, 528i xDrive, 535d, 535d xDrive, 535i, 535i xDrive, and ActiveHybrid 5 models. Its composite construction combines a durable cast iron braking surface with a lightweight aluminum hat, reducing unsprung weight and improving overall vehicle dynamics. The vented design promotes efficient heat dissipation during braking, helping to maintain consistent stopping power and reduce the risk of brake fade under demanding conditions.

With a nominal thickness of 0.79 inches (20 mm) and a discard thickness of 0.72 inches (18.4 mm), this rotor meets OEM specifications for thickness tolerances, ensuring safe and effective braking performance. The rotor’s 12.99 inch (330 mm) outside diameter and five mounting bolt holes with a 4.72 inch (120 mm) bolt circle diameter provide precise fitment for the specified BMW models. The non-directional brake surface allows for flexible installation without concern for rotor orientation.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation or noise
• Addressing reduced braking efficiency due to rotor thickness below discard limits
• Improving heat management in braking systems prone to fade during heavy use
• Restoring proper rotor dimensions for safe and consistent brake pad contact
• Ensuring compatibility with BMW 5 Series models requiring vented, conventional rotors

Installation Notes and Tips

• Verify rotor thickness before installation to ensure it meets minimum discard thickness
• Clean mounting surfaces and hub to prevent rotor runout and vibration
• Torque mounting bolts to manufacturer specifications for secure fitment
• Check brake pads for wear and replace if necessary to optimize braking performance
• Perform a bed-in procedure after installation to ensure proper rotor and pad mating

Quality Assurance and Warranty

DuraGo rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The BR900984 rotor undergoes rigorous quality control to ensure consistent thickness, balance, and material integrity. While specific warranty details may vary, DuraGo typically offers coverage against defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.