Stoptech 128.35090L Disc Brake Rotor - Rear Left

StopTech Rear Left Sport Rotor Overview

The StopTech Sport Cross-Drilled Disc Brake Rotor, part number 128.35090L, is a direct replacement disc for factory brake systems using stock calipers. It is built for the rear left position and is sized for Mercedes-Benz applications that call for a 330 mm rear disc setup or solid rear disc configuration.

For Mercedes-Benz R350, ML350, ML450, ML550, ML320, ML500, R320, GL320, GL450, and R500 applications, this rotor combines OE-style fitment with a drilled surface pattern that supports more consistent braking response in daily driving.

Key Features

• Part number 128.35090L for rear left brake rotor applications
• 1-piece direct replacement design for factory brake systems
• X-drilled surface helps disperse heat and brake dust
• Drilled face helps reduce pad glazing and improve initial bite
• Black e-coating helps protect against corrosion
• High carbon metallurgy in most applications for quieter operation and improved crack resistance
• Coated hat finish for added durability
• 330 mm outside diameter with 5-lug mounting pattern

Product Details

StopTech Sport Cross-Drilled Disc Brake Rotors are engineered for drivers who want a replacement rotor that maintains stock-caliper compatibility while adding a performance-oriented drilled surface. The 330 mm outside diameter, 5-lug bolt pattern, and rear left fitment make this rotor a direct match for select Mercedes-Benz SUV and crossover brake systems. The coated finish helps resist corrosion, while the drilled design supports heat management and wet-weather braking consistency. Part number 128.35090L is a practical choice for owners looking to restore braking performance on Mercedes-Benz ML-Class, R-Class, and GL-Class vehicles without changing the factory brake layout.

Common Brake Issues This Rotor Can Address

• Brake fade from heat buildup during repeated stops
• Uneven pad glazing that reduces pedal response
• Surface corrosion on worn factory rotors
• Reduced wet-weather braking bite
• Noise and vibration associated with aged rear brake discs

Installation Notes and Fitment

Compatible With 2006-2012 Mercedes-Benz R350, rear left; 2008-2011 Mercedes-Benz ML350, rear left; 2010-2011 Mercedes-Benz ML450, rear left; 2010-2011 Mercedes-Benz ML550, rear left; 2008-2009 Mercedes-Benz ML320, rear left; 2008-2009 Mercedes-Benz ML550, rear left; 2007-2009 Mercedes-Benz R320, rear left; 2007 Mercedes-Benz GL320, rear left; 2007 Mercedes-Benz GL450, rear left; 2007 Mercedes-Benz ML320, rear left; 2006-2007 Mercedes-Benz ML350, rear left; 2006-2007 Mercedes-Benz ML500, rear left; 2006-2007 Mercedes-Benz R500, rear left.

Verify rotor diameter, rear solid-disc configuration, and left-side placement before installation. This rotor is intended for use with stock calipers and factory brake hardware layouts that match the listed Mercedes-Benz applications. Part number 128.35090L should be matched to the vehicle’s brake specification, especially on ML-Class and R-Class models with 330 mm front disc notes in the fitment data.

Quality Assurance

StopTech manufactures this rotor with black e-coating for corrosion protection and high carbon metallurgy in most applications to support quieter operation and improved crack resistance. The drilled sport design is intended to deliver consistent performance while maintaining direct-replacement fitment for the listed Mercedes-Benz vehicles.