Centric 121.34154 Disc Brake Rotor - Front

Overview of Centric C-TEK Standard Disc Brake Rotor 121.34154

The Centric C-TEK Standard Disc Brake Rotor 121.34154 is engineered for reliable braking performance on select BMW models. Designed as a vented rotor with a smooth surface, it offers consistent heat dissipation and durability for vehicles like the BMW 228i and 328i xDrive.

• Compatible with BMW 228i, 228i xDrive, 328d, 328d xDrive, 328i, 328i GT xDrive, 328i xDrive, 330e, 428i, 428i Gran Coupe, 428i xDrive, and 428i xDrive Gran Coupe
• Part number 121.34154 for precise identification
• Vented disc design with 40 straight OEM vanes for improved cooling
• Nominal thickness of 0.957 inches (24.3 mm) and discard thickness of 0.882 inches (22.4 mm)
• Overall height of 2.89 inches (73.4 mm) and outside diameter of 12.992 inches (330 mm)
• Floating disc mounting with 5 lug holes (0.654 inches diameter) on a 4.724 inch bolt circle diameter
• Smooth surface type for consistent pad contact and braking response

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric focuses on delivering OEM-equivalent replacement rotors that meet factory specifications. This product line emphasizes precise fitment and reliable braking performance without additional features like ABS tone rings or bearings. The 121.34154 rotor maintains the original equipment vented design with straight vanes to ensure proper heat dissipation and rotor longevity for BMW vehicles.

Technical Details and Specifications

This disc brake rotor features a vented design with 40 straight vanes, which enhances airflow and cooling during braking. The rotor’s nominal thickness is 0.957 inches (24.3 mm), with a discard thickness of 0.882 inches (22.4 mm), indicating when replacement is necessary. The overall height measures 2.89 inches (73.4 mm), and the outside diameter is 12.992 inches (330 mm), matching OEM dimensions for proper fitment. The rotor mounts using a floating disc mounting system with a center hole diameter of 3.11 inches (79 mm) and a mounting bolt hole circle diameter of 4.724 inches (120 mm) with 5 lug holes sized at 0.654 inches (16.6 mm).

Common Applications and Problem Solving

• Replacement for worn or warped rotors causing brake pulsation or noise
• Restores proper braking performance on BMW 228i and 328i xDrive models
• Addresses rotor thickness below discard limits to maintain safety
• Improves heat dissipation to reduce brake fade during extended use
• Eliminates uneven pad wear caused by damaged or uneven rotors

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness before installation
• Clean rotor surface and hub mounting area to prevent runout
• Use proper torque specifications for lug nuts to avoid rotor warping
• Check compatibility with vehicle ABS system; this rotor does not include an ABS tone ring
• Inspect brake pads and replace if worn to ensure optimal rotor performance

Quality Assurance and Warranty

Centric’s C-TEK Standard Disc Brake Rotors are manufactured to meet or exceed OEM standards for fit, form, and function. While specific warranty details for part number 121.34154 are not provided here, Centric typically offers limited warranties covering defects in materials and workmanship. Users should consult product documentation or Centric directly for warranty terms.