Centric 121.33123 Disc Brake Rotor - Front

Overview of Centric C-TEK Standard Disc Brake Rotor 121.33123

The Centric C-TEK Standard Disc Brake Rotor 121.33123 is engineered for reliable braking performance on select Audi models. Designed specifically for Audi A4, A4 Quattro, A5, A5 Quattro, and Q5 vehicles, this vented disc brake rotor offers consistent stopping power and durability.

• Compatible with Audi A4, A4 Quattro, A5, A5 Quattro, and Q5
• Part number 121.33123 for precise fitment
• Vented rotor design with pillar-style vanes for improved heat dissipation
• Nominal thickness of 1.173 inches (29.8 mm) and discard thickness of 1.102 inches (28.0 mm)
• Overall height of 2.055 inches (52.2 mm) and outside diameter of 12.598 inches (320 mm)
• Floating disc mounting with 5 lug holes, each 0.598 inches (15.2 mm) in diameter
• Smooth surface type for consistent pad contact

Product Line Details: C-TEK Standard Disc Brake Rotors

The C-TEK Standard Disc Brake Rotors line by Centric focuses on delivering dependable, OE-quality replacement rotors. This product line emphasizes precise manufacturing tolerances and material quality to ensure proper fit and function. The 121.33123 rotor maintains these standards, providing a vented design with pillar-style vanes to help manage heat buildup during braking, which is critical for maintaining braking efficiency and rotor longevity on Audi vehicles.

Technical Specifications and Features

This disc brake rotor features a vented design with pillar-style vanes that enhance airflow and cooling, reducing the risk of brake fade during extended use. The rotor’s nominal thickness is 1.173 inches (29.8 mm), with a discard thickness of 1.102 inches (28.0 mm), indicating when replacement is necessary to maintain safe braking performance. The overall height measures 2.055 inches (52.2 mm), and the outside diameter is 12.598 inches (320 mm), ensuring compatibility with the specified Audi models. The rotor mounts using a floating disc mounting system and includes five lug holes sized at 0.598 inches (15.2 mm) diameter, arranged on a 4.409 inch (112 mm) bolt circle diameter. The smooth surface type supports consistent brake pad contact, and the rotor weighs approximately 21.7 lbs (9.86 kg). Note that this rotor does not include an ABS tone ring or bearings.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on Audi A4, A4 Quattro, A5, A5 Quattro, and Q5
• Addresses brake pulsation caused by uneven rotor surfaces
• Improves braking performance by restoring proper rotor thickness
• Helps reduce brake fade through vented design and enhanced cooling
• Resolves noise issues related to rotor surface irregularities

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness before installation
• Clean rotor surface to remove any protective coatings or debris
• Use proper torque specifications for mounting bolts on the 5-lug pattern
• Check compatibility with vehicle ABS system as 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 specifications, ensuring reliable performance and fitment. While specific warranty details for part number 121.33123 should be confirmed with the supplier, Centric typically offers coverage against defects in materials and workmanship. This rotor is designed to provide consistent braking performance for Audi A4, A4 Quattro, A5, A5 Quattro, and Q5 models when installed and maintained properly.