DuraGo BR900878 Disc Brake Rotor - Rear

Overview of DuraGo BR900878 Disc Brake Rotor

The DuraGo BR900878 disc brake rotor is engineered for reliable braking performance on select Mercedes-Benz models. Designed with durable cast iron and a vented construction, this rotor supports effective heat dissipation and consistent stopping power for vehicles like the GL320, ML350, and R500.

• Material: Cast iron for strength and durability
• Vented rotor design to improve heat dissipation
• Drum-in-hat construction for integrated parking brake compatibility
• Outside diameter of 12.99 inches (330 mm) for precise fitment
• Mounting bolt pattern: 5 holes with 4.41 inch (112 mm) bolt circle diameter
• Nominal thickness: 0.87 inches (22 mm) with discard thickness at 0.76 inches (19.4 mm)
• Non-directional brake surface for flexible installation
• Overall height: 2.47 inches (62.8 mm)

Detailed Product Description

The DuraGo BR900878 disc brake rotor is constructed from full cast iron, providing a robust and reliable braking surface. Its vented design enhances airflow between the rotor faces, reducing heat buildup during braking and helping to maintain consistent performance under demanding conditions. The drum-in-hat style integrates a parking brake drum within the rotor, making it compatible with vehicles equipped with drum-in-hat parking brake systems. This rotor does not include an ABS tone ring and features a non-directional braking surface, allowing for flexible installation without concern for rotor orientation.

With an outside diameter of 12.99 inches (330 mm) and a mounting bolt pattern of 5 holes spaced on a 4.41 inch (112 mm) bolt circle, the BR900878 is specifically designed to fit a range of Mercedes-Benz SUVs and crossovers, including the GL320, GL350, GL450, GL550, ML320, ML350, ML500, ML550, R320, R350, and R500 models.

Common Applications and Issues Addressed

• Replacement for worn or warped rotors causing brake pulsation
• Restores braking efficiency on Mercedes-Benz GL and ML series vehicles
• Addresses rotor thickness below manufacturer discard limits
• Improves heat dissipation to reduce brake fade during heavy use
• Compatible with drum-in-hat parking brake systems to maintain parking brake function

Installation Notes and Tips

• Ensure rotor thickness meets or exceeds nominal thickness of 0.87 inches (22 mm) before installation
• Check mounting bolt hole alignment with 5-hole, 112 mm bolt circle pattern
• Clean hub surface to prevent rotor runout and ensure proper fit
• Torque mounting bolts to manufacturer specifications for secure installation
• Inspect brake pads and calipers during rotor replacement for optimal braking system performance

Quality Assurance and Warranty

DuraGo disc brake rotors are manufactured to meet or exceed OEM specifications for fit, form, and function. The BR900878 rotor undergoes rigorous quality control to ensure durability and consistent braking performance. While specific warranty details may vary, DuraGo typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or the supplier for exact warranty terms.