Dynamic Friction 4512-21051 Disc Brake Kit - Rear

Rear Brake Kit for Hyundai and Kia

DFC Friction part number 4512-21051 is a rear disc brake kit built for select Hyundai Ioniq, Kia Niro, Kia Niro EV, and Kia Optima applications. It combines GEOSPEC coated rotors, 5000 Advanced ceramic brake pads, and matching brake hardware in one service package for a complete rear brake refresh.

Key Features

• Rear disc brake kit with coated rotors, ceramic pads, and hardware
• DFC GEOSPEC coating helps resist rust and leaves a silver-gray finish
• Rotors are dry processed and ready to install
• Non-directional rotor finish supports even pad bed-in and quieter stops
• 5000 Advanced pads are post-cured and scorched for stable friction performance
• Premium rubber-steel-rubber shims help reduce noise, vibration, and harshness
• OE-style rotor machining and inspection for dimensional consistency
• Part number 4512-21051 for rear brake service applications

Product Line Details

DFC Complete Brake Kits are packaged to simplify brake service by combining the major wear components needed for a rear brake job. The GEOSPEC rotor line uses a corrosion-resistant coating and OE-matched cast iron construction, while the 5000 Advanced pad formulation is developed for consistent friction across a range of vehicle platforms. For this application, the kit is focused on rear brake service for Hyundai Ioniq and Kia models, including EV and plug-in variants where listed.

Fitment

• Fits 2018-2020 Hyundai Ioniq, rear; Plug-in
• Fits 2017-2020 Hyundai Ioniq, rear
• Fits 2018-2019 Kia Niro, rear
• Fits 2019 Kia Niro EV, rear
• Fits 2014-2016 Kia Optima, rear
• Fits 2014-2015 Kia Optima, rear; Electric Parking Brake compatible disc brake rotor

What It Is Used For

• Rear brake rotor and pad replacement on worn Hyundai Ioniq and Kia rear brake systems
• Correction of brake noise caused by worn pads, fatigued hardware, or uneven rotor surfaces
• Restoration of braking feel after corrosion or pad wear reduces stopping consistency
• Service on rear brake systems that need OE-style rotor fit and pad bedding characteristics
• Replacement for rear brake components showing rust, vibration, or uneven wear

Installation Notes and Tips

Confirm rear axle fitment before ordering, since this kit is listed for rear applications only. The coated rotors are shipped dry and ready to install, so no oil removal is required before service. During installation, inspect caliper slides, mounting points, and existing brake lines for wear or corrosion, and follow the vehicle manufacturer’s brake service procedure for pad bedding and torque specifications.

Quality Assurance

DFC GEOSPEC rotors are machined to tight tolerances, finished with a non-directional surface, and inspected for critical dimensions and balance. The rotors are covered by a 12-month warranty against defects in material and workmanship. Part number 4512-21051 is built for rear brake service on select Hyundai and Kia vehicles, including Hyundai Ioniq, Kia Niro, Kia Niro EV, and Kia Optima applications.