Centric 121.33103 Disc Brake Rotor - Front

Overview of Centric C-TEK Standard Disc Brake Rotor 121.33103

The Centric C-TEK Standard Disc Brake Rotor 121.33103 is engineered for reliable braking performance on Audi A4 and A4 Quattro models. Designed as a vented rotor with a smooth surface, it provides consistent stopping power and heat dissipation for everyday driving conditions.

• Compatible with Audi A4 and A4 Quattro
• Part number: 121.33103
• Vented disc brake rotor with smooth surface
• Outside diameter: 288 mm (11.339 inches)
• Nominal thickness: 24.9 mm (0.980 inches)
• Discard thickness: 23.0 mm (0.906 inches)
• Overall height: 46.9 mm (1.846 inches)
• Floating disc mounting with vented hat design
• 5 lug holes with 112 mm bolt circle diameter
• Weight approximately 7.93 kg (17.45 lbs)

Product Line Details: C-TEK Standard Disc Brake Rotors

The C-TEK Standard Disc Brake Rotors line by Centric offers a balance of quality and value for standard replacement needs. These rotors are designed to meet or exceed OEM specifications, providing dependable braking performance without additional features like ABS tone rings or specialized coatings. The 121.33103 rotor fits within this line, featuring a vented design and smooth surface to maintain effective heat dissipation and consistent pad contact.

Technical Specifications and Features

This Centric rotor features a vented design with straight vanes to improve airflow and reduce heat buildup during braking. The smooth surface ensures even pad wear and quiet operation. With a nominal thickness of 24.9 mm and a discard thickness of 23.0 mm, it offers a clear service life indicator. The rotor’s overall height is 46.9 mm, and it mounts using a floating disc system with a vented hat, which helps reduce weight and improve heat dissipation. The 5-lug hole pattern with a 112 mm bolt circle diameter matches factory specifications for Audi A4 and A4 Quattro models.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Audi A4 and A4 Quattro
• Addresses brake pulsation caused by uneven rotor surfaces
• Improves braking consistency by restoring proper rotor thickness
• Reduces brake fade through vented rotor design
• Eliminates noise issues related to rotor surface irregularities

Installation Notes and Tips

Ensure the rotor is installed on compatible Audi A4 or A4 Quattro models matching the part number 121.33103. Verify rotor thickness before installation to confirm it is above the discard thickness of 23.0 mm. Clean the rotor surface and hub mounting area to prevent uneven contact. Use proper torque specifications for the 5 lug nuts on the 112 mm bolt circle. Since this rotor does not include bearings or an ABS tone ring, reuse existing components if applicable.

Quality Assurance and Warranty

Centric C-TEK Standard Disc Brake Rotors are manufactured to meet OEM standards for fit, form, and function. Each rotor undergoes quality control inspections to ensure dimensional accuracy and material integrity. While specific warranty details are not provided here, Centric typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or Centric directly for warranty terms related to part number 121.33103.