Dynamite Friction 4512-31221 Disc Brake Kit - Rear

Rear Brake Kit for BMW 135i and 135is

The Dynamite Friction DFC GEOSPEC Coated Rotors with 5000 Advanced Brake Pads - Ceramic and Hardware kit, part number 4512-31221, is a rear disc brake service kit built for select BMW 135i and 135is applications. It combines coated rotors, ceramic brake pads, and brake hardware in one package for a complete rear brake service.

Key Features

• Rear disc brake kit for select BMW 135i and BMW 135is models
• DFC GEOSPEC coated rotors with a dry, ready-to-install finish
• Rotor coating helps resist rust and corrosion
• Non-directional rotor finish supports even pad bed-in and smoother braking
• DFC 5000 Advanced ceramic brake pads with post-cured friction material
• Premium rubber-steel-rubber shims for improved noise and vibration control
• Brake hardware designed with PTFE coating, vulcanized rubber, and stainless steel
• Part number 4512-31221

Product Details

This DFC brake kit is engineered for rear brake service on 2008-2013 BMW 135i and 2013 BMW 135is applications. The GEOSPEC rotors are machined to tight tolerances, finished for consistent contact, and inspected for balance and critical dimensions. The 5000 Advanced ceramic pads are post cured and scorched to reduce initial break-in time and deliver stable friction performance from the first stop. The included hardware is designed to address worn or corroded brake clips and related components that can contribute to noise, uneven wear, and caliper movement. Part number 4512-31221 is a practical choice for a rear brake refresh on BMW 135i and BMW 135is vehicles.

What This Brake Kit Helps Address

• Rear brake noise from worn hardware or pad movement
• Rust buildup on exposed rotor surfaces
• Uneven or premature pad wear
• Reduced braking smoothness from aged rear components
• Longer service time caused by cleaning oil-coated rotors before installation

Installation Notes and Tips

Fits 2008-2013 BMW 135i, rear. Fits 2013 BMW 135is, rear. Confirm whether the vehicle uses the original design aluminum hat front rotors or the optional full cast rotor setup noted in the fitment data before ordering. Inspect calipers, slides, and mounting points during service so the new rotors and pads can perform as intended. Follow the vehicle manufacturer’s brake bedding procedure after installation.

Quality Assurance

DFC GEOSPEC rotors are manufactured to OE-style specifications using G3000/G11H18 cast iron, then inspected for balance and critical dimensions. Each rotor includes a 12-month warranty against defects in material and workmanship. The brake pads are post cured, scorched, and assembled with premium shims to support consistent friction and NVH control.