Dynamite Friction 4002-80042 Disc Brake Rotor Set - Rear

Rear Brake Rotor Set for Mazda 3 and CX-3

The Dynamite Friction DFC Brake Rotors - GEOSPEC Coated rear disc brake rotor set, part number 4002-80042, is built for select Mazda rear brake applications from 2017-2024. It is a direct-fit replacement for Mazda 3, Mazda 3 Sport, CX-3, and CX-30 rear rotor applications listed below.

Key Features

• Rear disc brake rotor set for select Mazda vehicles
• GEOSPEC coated finish for added corrosion resistance on exposed rotor surfaces
• Direct replacement format for rear brake service
• Compatible with 2017-2024 Mazda 3 and Mazda 3 Sport rear applications
• Compatible with 2019-2022 Mazda CX-3 rear applications
• Compatible with 2020-2022 Mazda CX-30 rear applications
• Part number 4002-80042

Product Details

Dynamite Friction’s DFC Brake Rotors - GEOSPEC Coated line focuses on coated replacement rotors for everyday brake service. On this rear rotor set, the GEOSPEC coating helps protect non-friction surfaces from rust buildup, which is especially relevant for vehicles exposed to wet roads, road salt, and seasonal weather changes. This part number, 4002-80042, covers multiple rear Mazda fitments, including Japan-built and Mexico-built 2017-2018 Mazda 3 and Mazda 3 Sport applications with and without electric parking brake, plus later rear applications for Mazda 3, Mazda 3 Sport, CX-3, and CX-30.

Compatible With: Fits 2021-2024 Mazda 3 Sport, rear; Fits 2021-2022 Mazda 3, rear; Fits 2021-2022 Mazda CX-3, rear; Fits 2022 Mazda CX-30, rear; Fits 2020-2021 Mazda CX-30, rear; Fits 2019-2020 Mazda 3, rear; Fits 2019-2020 Mazda 3 Sport, rear; Fits 2019-2020 Mazda CX-3, rear; Fits 2017-2018 Mazda 3, rear; Fits 2017-2018 Mazda 3 Sport, rear.

What It Helps Address

• Rear brake rotor wear from normal pad contact and mileage
• Brake pulsation caused by rotor surface condition
• Rust on exposed rotor areas
• Brake service needs on Mazda 3, Mazda 3 Sport, CX-3, and CX-30 rear axles
• Replacement of worn rear rotors during pad and brake inspection service

Installation Notes

Verify rear axle fitment by year, model, and build configuration before ordering, especially for 2017-2018 Mazda 3 and Mazda 3 Sport vehicles with or without an electric parking brake. Confirm rotor application against the vehicle’s brake system and compare the existing rotor to the replacement part number 4002-80042 before installation. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

DFC Brake Rotors - GEOSPEC Coated are part of Dynamite Friction’s coated rotor program for replacement brake service. The GEOSPEC coating is used to help maintain a cleaner-looking rotor surface on non-friction areas while supporting long-term serviceability in rear brake applications.