DuraGo BR900774 Disc Brake Rotor - Rear

Overview of DuraGo BR900774 Disc Brake Rotor

The DuraGo BR900774 disc brake rotor is engineered for reliable braking performance on select BMW models. Designed with durable cast iron and a vented construction, this rotor supports effective heat dissipation and consistent stopping power for vehicles like the BMW 328i and X1.

• Material: Cast iron for strength and durability
• Vented rotor design to improve heat dissipation
• Drum-in-hat construction for integrated parking brake function
• Non-directional brake surface for versatile installation
• Five mounting bolt holes with a 120 mm bolt circle diameter
• Nominal thickness of 0.79 inches (20 mm) with discard thickness at 0.72 inches (18.4 mm)
• Overall diameter of 11.81 inches (300 mm) and height of 2.61 inches (66.2 mm)

Detailed Product Description

The DuraGo BR900774 is a full cast iron disc brake rotor designed specifically for BMW vehicles including the 130i, 325xi, 328i, 328i xDrive, 328xi, and X1 models. Its vented design enhances cooling efficiency by allowing air to flow between the rotor surfaces, reducing the risk of brake fade during extended use. The drum-in-hat construction integrates a parking brake drum within the rotor, eliminating the need for a separate drum and simplifying the braking system. This rotor features a non-directional braking surface, allowing installation on either side of the vehicle without performance loss. The rotor’s five mounting bolt holes with a 120 mm bolt circle diameter ensure secure fitment and alignment. With a nominal thickness of 0.79 inches and a discard thickness of 0.72 inches, this rotor meets OEM specifications for thickness and wear limits.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation or noise
• Upgrading rotors to restore braking performance on BMW 328i and X1 models
• Addressing rotor thickness below manufacturer discard limits
• Resolving overheating issues with vented rotor design
• Maintaining integrated parking brake functionality with drum-in-hat construction

Installation Notes and Tips

When installing the DuraGo BR900774 rotor, ensure the rotor surface is clean and free of any protective coatings or debris. Verify the rotor thickness before installation to confirm it meets minimum specifications. Use proper torque settings on the five mounting bolts to secure the rotor firmly. Since this rotor is non-directional, it can be installed on either side of the vehicle. It is recommended to replace brake pads simultaneously to ensure optimal braking performance and even wear.

Quality Assurance and Warranty

DuraGo manufactures the BR900774 rotor to meet or exceed OEM standards for fit, form, and function. The cast iron construction and vented design provide durability and heat management consistent with factory requirements. While specific warranty details are not provided, DuraGo products typically come with a limited warranty against defects in materials and workmanship. Always consult product documentation or the manufacturer for exact warranty terms.