Raybestos 980399R Disc Brake Rotor - Rear

Overview of Raybestos R-Line Disc Brake Rotor 980399R

The Raybestos R-Line 980399R disc brake rotor is engineered for reliable braking performance on BMW X3 models. Designed as a vented, drum-in-hat type rotor, it offers effective heat dissipation and durability for consistent stopping power.

• Compatible with BMW X3 vehicles
• Vented disc brake rotor design for improved cooling
• Drum-in-hat type rotor with integrated parking brake drum
• Overall height: 3.134 inches (79.6 mm)
• Outside diameter: 12.589 inches (319.75 mm)
• Nominal thickness: 0.866 inches (22.0 mm)
• Discard thickness: 0.803 inches (20.4 mm)
• Mounting bolt hole quantity: 5 with 0.654 inch (16.6 mm) diameter holes
• Center hole diameter: 2.953 inches (75.0 mm)
• Mounting bolt hole circle diameter: 4.724 inches (120.0 mm)
• Stud/lug hole quantity: 5

Detailed Product Description

The Raybestos R-Line 980399R rotor is specifically designed for the BMW X3, ensuring precise fitment and optimal braking performance. This vented rotor features a drum-in-hat design, combining the disc braking surface with an integrated parking brake drum, which is essential for vehicles equipped with rear drum parking brakes. The rotor's nominal thickness of 0.866 inches (22.0 mm) provides a solid braking surface, while the discard thickness of 0.803 inches (20.4 mm) indicates the minimum safe thickness before replacement is necessary. The overall height of 3.134 inches (79.6 mm) and outside diameter of 12.589 inches (319.75 mm) match OEM specifications for proper installation and operation. The 5 mounting bolt holes and stud/lug holes ensure secure attachment to the wheel hub, with a bolt circle diameter of 4.724 inches (120.0 mm) and center hole diameter of 2.953 inches (75.0 mm) for accurate alignment.

About the Raybestos R-Line Product Line

The R-Line by Raybestos is a product line focused on delivering reliable, OEM-quality brake components designed to meet or exceed factory specifications. The R-Line disc brake rotors, including part number 980399R, are engineered to provide consistent performance and durability for specific vehicle applications such as the BMW X3. This line emphasizes precise fitment and functional design, including vented rotors and drum-in-hat configurations where applicable.

Common Applications and Issues Addressed

• Replacement for worn or warped rotors causing brake pulsation
• Restoring braking performance on BMW X3 models with reduced rotor thickness
• Addressing noise or vibration related to rotor surface irregularities
• Ensuring proper parking brake function with integrated drum-in-hat design
• Improving heat dissipation to reduce brake fade during extended use

Installation Notes and Tips

• Verify rotor thickness before installation; replace if below discard thickness of 0.803 inches (20.4 mm)
• Ensure mounting surfaces are clean and free of debris for proper fitment
• Torque mounting bolts to manufacturer specifications to avoid rotor warping
• Inspect brake pads and hardware during rotor replacement for optimal system performance
• Follow BMW X3 service manual guidelines for rotor installation and brake system bleeding

Quality Assurance and Warranty

Raybestos R-Line rotors, including part number 980399R, are manufactured to meet strict quality standards for fit, form, and function. While specific warranty details may vary, Raybestos typically offers coverage against defects in materials and workmanship. Users should consult product documentation or contact Raybestos directly for warranty terms applicable to this rotor.