Centric 121.45091 Disc Brake Rotor - Rear

Reliable Disc Brake Rotor for Mazda CX-9

The Centric C-TEK Standard Disc Brake Rotor 121.45091 is engineered to provide consistent braking performance for your Mazda CX-9. Designed with precision, this solid rotor meets OEM specifications to ensure proper fit and function.

• Compatible with Mazda CX-9 models
• Part number 121.45091 for accurate identification
• Solid disc brake rotor with smooth surface finish
• Outside diameter of 12.791 inches (324.9 mm)
• Nominal thickness of 0.433 inches (11.0 mm) and discard thickness of 0.354 inches (9.0 mm)
• Overall height of 1.776 inches (45.1 mm)
• Five stud/lug holes with 0.524 inch (13.3 mm) diameter
• Floating disc mounting design

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers rotors manufactured to meet or exceed OEM standards. This product line focuses on delivering reliable braking performance with consistent dimensions and quality materials. The 121.45091 rotor is part of this line, providing a solid rotor design with a smooth surface ideal for everyday driving conditions on the Mazda CX-9.

Technical Specifications and Features

This disc brake rotor features a solid construction with a smooth surface type, ensuring even pad contact and braking efficiency. The rotor measures 12.791 inches in outside diameter and has a nominal thickness of 0.433 inches, with a discard thickness of 0.354 inches, indicating when replacement is necessary. The overall height is 1.776 inches, and it includes a floating disc mounting design for proper alignment and heat dissipation. The rotor has five stud/lug holes with a diameter of 0.524 inches and a mounting bolt hole circle diameter of 4.5 inches (114.3 mm). The center hole diameter is 2.677 inches (68.0 mm), and the rotor weighs approximately 13.55 lbs (6.16 kgs). This rotor does not include an ABS tone ring or bearings.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Mazda CX-9
• Addresses brake pulsation and vibration issues
• Restores proper braking surface for improved stopping power
• Eliminates noise caused by uneven rotor wear
• Prevents brake fade due to rotor overheating

Installation Notes and Tips

Ensure the rotor surface is clean and free of debris before installation. Verify the rotor thickness is above the discard thickness specification to maintain safety. Use proper torque specifications for mounting bolts and check for proper alignment with the floating disc mounting design. This rotor does not include bearings or ABS tone rings, so reuse existing components if applicable.

Quality Assurance and Warranty

Centric's C-TEK Standard Disc Brake Rotors are manufactured to meet OEM standards for fit, form, and function. While specific warranty details are not provided, Centric products typically undergo rigorous quality control to ensure durability and performance for Mazda CX-9 vehicles.