Centric 121.34046 Disc Brake Rotor - Rear

Overview of Centric C-TEK Standard Disc Brake Rotor 121.34046

The Centric C-TEK Standard Disc Brake Rotor 121.34046 is engineered for reliable braking performance on select BMW models. Designed specifically for BMW 525i, 528i, 530i, and 540i vehicles, this vented rotor provides consistent heat dissipation and smooth braking response.

• Compatible with BMW 525i, 528i, 530i, and 540i models
• Part number 121.34046 for precise fitment
• Vented disc design for improved cooling
• Nominal thickness of 0.787 inches (20.000 mm)
• Outside diameter of 11.732 inches (298.000 mm)
• Overall height of 2.402 inches (61.000 mm)
• Solid smooth surface for consistent pad contact
• Five lug holes with 0.575 inch (14.600 mm) diameter
• Center hole diameter of 2.953 inches (75.000 mm)

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers a balance of quality and value for everyday driving conditions. These rotors are designed to meet or exceed OEM specifications, providing dependable braking performance without additional features like ABS tone rings or bearings. The vented rotor design in this line helps maintain optimal operating temperatures, reducing the risk of brake fade during normal use.

Technical Details and Specifications

This Centric rotor features a vented design with straight vanes to enhance airflow and heat dissipation. The nominal thickness is 0.787 inches (20.000 mm), with a discard thickness of 0.724 inches (18.400 mm), indicating when replacement is necessary. The rotor’s outside diameter measures 11.732 inches (298.000 mm), and it has an overall height of 2.402 inches (61.000 mm). The mounting bolt hole circle diameter is 4.724 inches (120.000 mm) with five lug holes, each 0.575 inches (14.600 mm) in diameter. The rotor weighs approximately 13.6 lbs (6.18 kgs), balancing durability and ease of installation.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 525i, 528i, 530i, and 540i
• Addresses brake pulsation and vibration issues
• Improves braking consistency and pedal feel
• Helps reduce brake fade under normal driving conditions
• Restores proper rotor thickness for safe braking performance

Installation Notes and Tips

Ensure the rotor surface is clean and free of rust or debris before installation. Verify the rotor thickness is above the discard thickness of 0.724 inches (18.400 mm) to maintain safety standards. This rotor does not include bearings or an ABS tone ring, so confirm compatibility with your vehicle’s braking system. Use proper torque specifications on the five lug nuts to secure the rotor. It is recommended to replace brake pads simultaneously for optimal performance.

Quality Assurance and Warranty

Centric C-TEK Standard Disc Brake Rotors are manufactured to meet OEM standards for fit, form, and function. While specific warranty details are not provided here, Centric typically offers coverage against defects in materials and workmanship. Always consult product documentation or the manufacturer for exact warranty terms.