Centric 320.45079F Disc Brake Rotor - Rear

Centric GCX Rear Rotor for Mazda CX-9

Centric GCX Elemental Protection Disc Brake Rotor 320.45079F is a rear vented rotor for 2007-2015 Mazda CX-9 applications. It uses a fully coated disc finish and coated hat finish to help protect exposed surfaces while maintaining a smooth braking surface.

Key Features

• Part number: 320.45079F
• Fits 2007-2015 Mazda CX-9, rear
• Fully coated disc finish with coated hat finish
• Vented rotor design with straight vanes
• Smooth surface type for consistent pad contact
• Outside diameter: 12.756 in. (324.000 mm)
• Nominal thickness: 0.709 in. (18.000 mm)
• Discard thickness: 0.630 in. (16.000 mm)
• 5-lug pattern with 114.300 mm bolt circle
• Floating disc mounting and 4 miscellaneous holes

Product Details

Centric GCX Elemental Protection Disc Brake Rotors - Full Coating are built for drivers who need a direct-fit rear brake rotor for the Mazda CX-9. The fully coated construction helps protect the rotor surfaces, while the vented, straight-vane design supports heat management during repeated braking. With a 324 mm outside diameter, 18 mm nominal thickness, and smooth friction surface, this rotor is specified for rear brake service on the listed Mazda CX-9 model years.

This part number, 320.45079F, is a fitment-based replacement for 2007-2015 Mazda CX-9 rear brake applications. It cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Brake pulsation from worn or uneven rear rotors
• Corrosion on exposed rotor surfaces
• Reduced braking consistency from rotor wear
• Noise caused by rotor surface irregularities
• Rear brake service needs on Mazda CX-9 models

Installation Notes and Tips

Verify rotor dimensions, hub fitment, and rear axle application before installation. Clean the hub mounting surface thoroughly to help prevent runout-related brake issues. Replace brake pads and inspect caliper hardware, guide pins, and wheel bearings during rotor service when wear is present. Confirm the 5-lug, 114.300 mm bolt circle and 72.000 mm center hole diameter match the vehicle before assembly.

Quality Assurance

Centric GCX rotors are engineered as application-specific brake components with coated surfaces for added protection against corrosion. Part number 320.45079F is listed for confirmed rear fitment on 2007-2015 Mazda CX-9 models.