DuraGo BR34220 Disc Brake Rotor - Rear

Overview of DuraGo BR34220 Disc Brake Rotor

The DuraGo BR34220 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 323i and 328i.

• Material: Cast iron for strength and durability
• Vented rotor design to improve heat dissipation
• Drum-in-hat construction for integrated parking brake functionality
• Non-directional brake surface for versatile installation
• Fits BMW 323i, 325Ci, 325i, 328Ci, 328i, and 328is models
• Mounting bolt pattern: 5 holes with 120 mm bolt circle diameter
• Nominal thickness: 0.75 inches (19 mm), discard thickness: 0.69 inches (17.4 mm)
• Overall diameter: 11.57 inches (294 mm)
• Center hole diameter: 2.95 inches (75 mm)

Detailed Product Description

The DuraGo BR34220 is a full cast iron disc brake rotor designed specifically for BMW vehicles including the 323i, 325Ci, 325i, 328Ci, 328i, and 328is. Its vented design allows air to flow between the rotor surfaces, reducing heat buildup during braking and helping to maintain consistent brake performance. The drum-in-hat construction integrates a parking brake drum within the rotor, eliminating the need for a separate drum and simplifying installation. This rotor features a non-directional braking surface, allowing it to be installed on either side of the vehicle without concern for directional rotation.

With a nominal thickness of 0.75 inches (19 mm) and a discard thickness of 0.69 inches (17.4 mm), the BR34220 ensures a balance between durability and performance. The overall diameter of 11.57 inches (294 mm) and a 5-bolt mounting pattern with a 120 mm bolt circle diameter provide a precise fit for compatible BMW models. The rotor does not include an ABS tone ring and does not have rust-resistant coating, so proper maintenance is recommended to prevent corrosion over time.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation or noise
• Addressing reduced braking efficiency due to rotor thinning or scoring
• Restoring proper parking brake function with integrated drum-in-hat design
• Improving heat dissipation to prevent brake fade during extended use
• Ensuring compatibility with BMW 3 Series models for reliable braking performance

Installation Notes and Tips

• Verify rotor thickness before installation; replace if below discard thickness of 0.69 inches
• Ensure mounting surface and hub are clean and free of debris for proper rotor seating
• Use proper torque specifications on mounting bolts to avoid rotor warping
• Check brake pads for wear and replace if necessary to maintain optimal braking
• Since the rotor lacks rust-resistant coating, consider applying anti-corrosion treatment if exposed to harsh environments

Quality Assurance and Warranty

DuraGo manufactures the BR34220 rotor to meet or exceed OEM specifications for fit and function on compatible BMW models. Constructed from cast iron with a full cast design, this rotor provides consistent braking performance under normal operating conditions. While the product does not include a rust-resistant coating, adherence to maintenance guidelines can extend service life. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.