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Matched 360 mm Rear Brake Service for Mercedes-AMG
The Brembo KT04525 rear brake kit pairs two 360 mm drilled and slotted Prime UV-coated rotors with a matching low-metallic rear pad set for the verified Mercedes-Benz applications below. It provides an OE-style replacement package for cars equipped with the correct iron-disc rear braking system.
Key Features
- KT04525 combines two rear rotors with one rear axle pad set.
- 09.B879.11 drilled and slotted ventilated rear rotors measure 360 mm in diameter and 26 mm nominal thickness.
- High-carbon cast iron and UV corrosion protection on the rotor hub and edges.
- Brembo PVT rotor ventilation design.
- P50125 Prime low-metallic pads for compatible iron-disc braking systems.
- Matched replacement components; existing calipers are retained when serviceable and compatible.
Fitment
| Years | Make | Model | Submodel |
|---|---|---|---|
| 2017-2020 | Mercedes-Benz | AMG GT | Base |
| 2013-2019 | Mercedes-Benz | SL63 AMG | Base |
| 2013-2018 | Mercedes-Benz | SL65 AMG | Base |
Confirm KT04525 against the vehicle's VIN, rear rotor dimensions, caliper configuration and factory brake option. This is not a carbon-ceramic replacement kit. Do not extend these verified rows to AMG GT S, C, R or other variants without exact application confirmation.
Specifications
| Detail | Value |
|---|---|
| Brand | Brembo |
| Manufacturer kit number | KT04525 |
| Position | Rear axle |
| Rotor part number | 09.B879.11 |
| Rotor quantity | 2 |
| Rotor diameter | 360 mm |
| Nominal rotor thickness | 26 mm |
| Rotor minimum thickness | 24 mm |
| Rotor height | 51 mm |
| Centering diameter | 67 mm |
| Wheel fixing holes | 5 |
| Rotor construction | Drilled and slotted, ventilated high-carbon cast iron, UV coated |
| Rear pad set | P50125 / P 50 125, Prime low-metallic |
| Pad FMSI reference | D1681 8911 |
What's Included
- Two Brembo 09.B879.11 rear rotors.
- One Brembo P50125 rear axle pad set.
KT04525 is a rotor-and-pad service kit. Calipers, brake lines and brake fluid are not included. Verify any required wear sensors and vehicle-specific installation hardware before service rather than assuming every ancillary item is supplied.
About Brembo
Brembo develops braking components for original-equipment and replacement applications. Its Prime range provides OE-equivalent service components selected by exact vehicle and brake-system requirements.
Related Parts
- Brembo 09.B879.11 rear rotor — the individual rotor used in this kit; separate rotor listing is sold individually.
- Brembo P50125 rear pad set — the matching pad component for separate replacement. These components are already included in the kit.
FAQ
What is the KT04525?It is a Brembo rear brake service kit containing two 360 mm rotors and a matching rear pad set for the listed Mercedes-Benz applications.
Is this a front or rear kit?It services the rear axle only.
How many rotors are included?Two rear rotors, allowing both sides of the rear axle to be serviced together.
Will this replace carbon-ceramic brakes?No. Brembo specifies that the included pad application is not for carbon-ceramic discs.
Do all AMG GT variants use this kit?No. Only the exact verified model, submodel, year and brake configuration should be used to establish fitment.
Are new calipers included?No. This package contains rotors and pads, not calipers or a big-brake conversion.
Are the Related Parts additional requirements?The linked rotor and pad listings identify components already included. Buy them separately only for a separate service need.
What warranty does Brembo describe for US buyers?Brembo's US limited warranty states 24 months for the original end purchaser buying from an authorized seller, subject to its terms. Normal wear, improper installation and racing use are among the exclusions.
Installation Instructions
- Verify KT04525 against the VIN and existing rear brake equipment before disassembly.
- Have a qualified brake technician follow the applicable Mercedes-Benz and Brembo service procedures.
- Support the vehicle correctly and use the prescribed electronic parking-brake service procedure where applicable.
- Inspect calipers, hub surfaces, guides, hoses, wear sensors and hardware; replace unserviceable items as required.
- Fit both rear rotors and the matching pads, using the specified fastener torques and replacement-fastener requirements.
- Complete pedal, fluid-level, clearance and leak checks, then follow the approved bedding and controlled road-test procedure.
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