Centric 121.34070 Disc Brake Rotor - Front

Overview of Centric C-TEK Standard Disc Brake Rotor 121.34070

The Centric C-TEK Standard Disc Brake Rotor 121.34070 is engineered for reliable braking performance on select BMW models. Designed as a vented rotor with a smooth surface, it provides consistent stopping power and heat dissipation for vehicles such as the BMW 525i, 528i, 530i, and 535i xDrive.

• Vented disc brake rotor for improved heat management
• Nominal thickness of 1.181 inches (30.000 mm) with discard thickness at 1.118 inches (28.400 mm)
• Overall height of 3.039 inches (77.200 mm)
• Outside diameter measures 12.756 inches (324.000 mm)
• Floating disc mounting with straight vane style for efficient cooling
• Five stud/lug holes with 0.575 inch (14.600 mm) diameter
• Center hole diameter of 3.110 inches (79.000 mm) and mounting bolt hole circle diameter of 4.724 inches (120.000 mm)
• Weight approximately 23 lbs (10.450 kgs)
• ABS tone ring not included; bearings not included

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers rotors designed to meet or exceed OEM specifications for fit, form, and function. This product line focuses on providing solid and vented rotors with smooth surfaces to ensure consistent braking performance and durability. The 121.34070 rotor is part of this line, delivering a balance of quality and value for BMW vehicles requiring reliable replacement rotors.

Detailed Product Description

This Centric disc brake rotor features a vented design with straight vanes that enhance airflow and heat dissipation during braking. The smooth surface type ensures even pad contact and reduces noise and vibration. With a floating disc mounting style, the rotor allows for slight movement to accommodate thermal expansion and improve braking consistency. The rotor’s dimensions, including a 12.756-inch outside diameter and 3.039-inch overall height, are tailored for precise fitment on BMW 525i, 525xi, 528i, 528i xDrive, 528xi, 530i, 530xi, 535i xDrive, and 535xi models. The part number 121.34070 identifies this specific rotor within the Centric catalog.

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation
• Addressing reduced braking efficiency due to rotor thickness below discard limits
• Eliminating brake noise and vibration from uneven rotor surfaces
• Improving heat dissipation to prevent brake fade during extended use
• Ensuring proper fitment for BMW 5 Series models with vented rotor requirements

Installation Notes and Tips

When installing the Centric C-TEK Standard Disc Brake Rotor 121.34070, ensure the rotor surface is clean and free of any protective coatings before mounting. Verify the rotor thickness is above the discard thickness of 1.118 inches (28.400 mm) to maintain safety standards. Use proper torque specifications for the five lug holes and confirm the center hole diameter matches the hub for a secure fit. Since bearings and ABS tone rings are not included, reuse existing components or replace as necessary. Proper bedding-in of brake pads after installation is recommended to optimize rotor performance.

Quality Assurance and Warranty

Centric manufactures the C-TEK Standard Disc Brake Rotors to meet stringent quality standards, ensuring durability and consistent braking performance. While specific warranty details for part number 121.34070 should be confirmed with the supplier, Centric typically offers limited warranties covering defects in materials and workmanship. This rotor is designed to provide reliable service life when installed and maintained according to manufacturer guidelines.