DuraGo BR900666 Disc Brake Rotor - Front

Durable Cast Iron Disc Brake Rotor for BMW 130i and 330i Models

The DuraGo BR900666 disc brake rotor is engineered to provide reliable braking performance for BMW 130i, 330i, and 330xi vehicles. Crafted from full cast iron, this vented rotor offers consistent heat dissipation and structural integrity for everyday driving conditions.

• Material: Full cast iron construction for durability
• Vented rotor design to improve heat dissipation
• Nominal thickness: 0.94 inches (24 mm) with discard thickness at 0.88 inches (22.4 mm)
• Outside diameter: 12.99 inches (330 mm) for precise fitment
• Mounting bolt hole quantity: 5 with 4.72 inches (120 mm) bolt circle diameter
• Non-directional brake surface for versatile installation
• Conventional rotor type compatible with standard brake systems

Technical Details and Construction

The DuraGo BR900666 rotor is constructed from full cast iron, a material known for its strength and thermal stability. This rotor features a vented design, which allows air to flow between the rotor surfaces, reducing heat buildup during braking. The nominal thickness of 0.94 inches (24 mm) ensures a solid braking surface, while the discard thickness of 0.88 inches (22.4 mm) indicates when replacement is necessary to maintain safety and performance. With an outside diameter of 12.99 inches (330 mm) and a center hole diameter of 3.11 inches (79 mm), this rotor is designed to fit BMW 130i, 330i, and 330xi models precisely. The rotor includes five mounting bolt holes with a 4.72-inch (120 mm) bolt circle diameter, ensuring secure attachment to the wheel hub.

Compatible Vehicles and Applications

This DuraGo disc brake rotor is compatible with the following BMW models:

• BMW 130i
• BMW 330i
• BMW 330xi

It is designed for use in conventional braking systems without ABS tone rings and features a non-directional brake surface, allowing for flexible installation on either side of the vehicle.

Common Issues Addressed by This Rotor

• Brake pulsation caused by warped rotors
• Reduced braking efficiency due to worn rotor thickness
• Overheating and brake fade from insufficient heat dissipation
• Noise and vibration from uneven rotor surfaces
• Corrosion-related rotor damage (note: this rotor does not include rust-resistant coating)

Installation Notes and Tips

When installing the DuraGo BR900666 rotor, ensure the rotor surface is clean and free of debris before mounting. Verify that the rotor thickness is above the discard limit of 0.88 inches (22.4 mm) to maintain safe braking performance. Use proper torque specifications for the five mounting bolts to avoid rotor warping. Since this rotor does not include an ABS tone ring, confirm compatibility with your vehicle’s ABS system. It is recommended to replace brake pads simultaneously to ensure optimal braking performance.

Quality Assurance and Warranty

DuraGo manufactures this rotor to meet or exceed OEM specifications for fit, form, and function. While this rotor does not feature a rust-resistant coating, its full cast iron construction provides reliable durability under normal operating conditions. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.