Brembo Rear Brake Rotor for Mercedes-Benz GL-Class/ML-Class/R-Class (2006–2012)

Brembo has supplied Formula 1 since 1975, and in 2025 every single Grand Prix winner ran on Brembo or Brembo Group brakes. This Brembo rear brake rotor (part number 09.R124.21) is the rotating disc the pads bite into, the part doing the real work of turning kinetic energy into heat under hard braking.

Brembo's UV-coated rotors are built as a direct OE-equivalent replacement, with high-carbon iron used where applicable to control noise and resist thermal cracking. Match this part to your application using the fitment table below — Brembo's range covers exact OE positions, and getting the right one matters as much as the brand.

Technical Details

• Manufacturer part number: 09.R124.21
• Part type: Rear Brake Rotor
• Vehicle system: Rear brake system
• Listed fitment years: 2006–2012

Fitment & Compatibility

Use the fitment table below to confirm year, model, submodel, and any brake-package notes before ordering. Optional and AMG/sport brake packages can change the correct part.

With over 20 years working on brakes and Porsche applications, PMB Performance can verify this fits your exact vehicle. Reach out with your VIN if anything in the fitment table needs checking.