Stoptech 126.34147SR Disc Brake Rotor - Rear Right

StopTech Sport Slotted Disc Brake Rotors Overview

The StopTech Sport Slotted Disc Brake Rotors (Part Number 126.34147SR) are engineered for BMW models requiring reliable braking performance. Designed with vented construction and a slotted surface, these rotors provide consistent heat dissipation and improved brake pad bite for enhanced control.

• Vented disc brake rotor for efficient heat management
• Slotted surface type to reduce brake fade and maintain pad cleanliness
• Coated hat finish for corrosion resistance
• Overall diameter of 344 mm (13.543 inches) for precise fitment
• Compatible with multiple BMW 3 and 4 Series models including xDrive variants
• Part number 126.34147SR ensures exact replacement

Detailed Product Features and Specifications

The StopTech Sport Slotted Disc Brake Rotors feature a vented design with straight vanes to optimize airflow and cooling during braking. The rotor has a nominal thickness of 24.000 mm (0.945 inches) and a discard thickness of 22.400 mm (0.882 inches), ensuring durability and safety margins for wear. The rotor’s overall height measures 66.200 mm (2.606 inches), and it includes a single center hole with a diameter of 75.000 mm (2.953 inches). The mounting bolt hole circle diameter is 120.000 mm (4.724 inches) with five stud/lug holes sized at 16.600 mm (0.654 inches) diameter, matching factory specifications for proper installation. The rotor weighs approximately 8.7 kg (19.15 lbs), balancing strength and weight for performance driving.

StopTech Sport Slotted Disc Brake Rotors Product Line

The StopTech Sport Slotted Disc Brake Rotors line is designed to provide enhanced braking performance for street and light track use. The slotted surface improves pad bite and helps evacuate gases and debris, reducing brake fade under demanding conditions. This product line focuses on maintaining OEM fitment and reliability while offering improved thermal management and braking consistency for BMW vehicles.

Compatible BMW Models and Applications

• Compatible with BMW 328d xDrive, 328i, 328i GT xDrive, 328i xDrive
• Fits BMW 330e, 330i, 330i GT xDrive, 330i xDrive
• Suitable for BMW 335i, 335i GT xDrive, 335i xDrive
• Works with BMW 340i, 340i GT xDrive, 340i xDrive
• Also compatible with BMW 428i, 428i Gran Coupe, 428i xDrive, 428i xDrive Gran Coupe
• Fits BMW 430i, 430i Gran Coupe, 430i xDrive, 430i xDrive Gran Coupe
• Compatible with BMW 435i, 435i Gran Coupe, 435i xDrive, 435i xDrive Gran Coupe
• Fits BMW 440i, 440i Gran Coupe, 440i xDrive, 440i xDrive Gran Coupe
• Also compatible with BMW ActiveHybrid 3

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat buildup during spirited driving
• Uneven pad wear due to rotor glazing or surface contamination
• Reduced braking performance from rotor warping or cracking
• Corrosion on rotor hats affecting longevity and appearance
• Inconsistent brake pedal feel under demanding conditions

Installation Notes and Tips

Ensure the rotor surface is clean and free of any protective coatings before installation. Verify that the rotor thickness is within the discard limits specified (22.400 mm minimum). Use proper torque specifications for mounting bolts to avoid rotor distortion. This rotor does not include bearings or ABS tone rings, so reuse existing components if applicable. It is recommended to replace brake pads when installing new rotors to maintain optimal braking performance.

Quality Assurance and Warranty

StopTech Sport Slotted Disc Brake Rotors are manufactured to meet or exceed OEM standards for fit, form, and function. The coated hat finish provides corrosion resistance to extend rotor life. While specific warranty details are not provided, StopTech products typically come with a limited warranty against defects in materials and workmanship. Always consult the manufacturer or authorized distributor for warranty terms.