Stoptech 128.35090L Disc Brake Rotor - Rear Left

Overview of StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotor (Part Number 128.35090L) is engineered for Mercedes-Benz models including GL320, GL450, ML320, ML350, ML450, ML500, ML550, R320, R350, and R500. Designed to provide reliable braking performance, this rotor features a solid, cross-drilled surface to enhance heat dissipation and maintain consistent stopping power.

• Cross-drilled solid disc brake rotor for improved heat management
• Coated hat finish to resist corrosion and extend rotor life
• Nominal thickness of 0.551 inches (14.000 mm) with discard thickness at 0.449 inches (11.400 mm)
• Overall diameter of 12.992 inches (330.000 mm) suitable for specified Mercedes-Benz models
• Five stud/lug holes with a 4.409 inch (112.000 mm) bolt circle diameter
• Center hole diameter of 2.638 inches (67.000 mm) for precise fitment
• Solid rotor design with two miscellaneous holes and no ABS tone ring included
• Weight approximately 17.5 lbs (7.95 kgs) for balanced performance

Detailed Product Description

The StopTech Sport Cross-Drilled Disc Brake Rotor 128.35090L is a solid rotor designed specifically for select Mercedes-Benz SUVs and crossovers. Its cross-drilled surface pattern helps to dissipate heat more effectively during braking, reducing the risk of brake fade under demanding conditions. The coated hat finish provides corrosion resistance, which is essential for maintaining rotor integrity over time. With a nominal thickness of 0.551 inches and a discard thickness of 0.449 inches, this rotor meets strict wear standards to ensure safety and performance. The rotor’s dimensions, including an outside diameter of 12.992 inches and a mounting bolt hole circle diameter of 4.409 inches, are engineered for direct compatibility with models such as the ML350 and GL450.

About StopTech Sport Cross-Drilled Disc Brake Rotors

The StopTech Sport Cross-Drilled Disc Brake Rotors line focuses on delivering enhanced braking performance through improved heat dissipation and durability. Cross-drilled rotors like the 128.35090L are designed to reduce brake fade by allowing gases and heat to escape more efficiently. This product line is suitable for drivers who require consistent braking response in both everyday driving and more demanding conditions, such as towing or spirited driving, particularly on Mercedes-Benz SUVs and crossovers.

Common Applications and Problem Solving

• Reduces brake fade during extended or heavy braking
• Improves heat dissipation to maintain consistent brake performance
• Resists corrosion with coated hat finish for longer service life
• Provides direct fitment for Mercedes-Benz GL and ML series models
• Addresses rotor wear with clear discard thickness specifications

Installation Notes and Tips

• Ensure rotor thickness is above discard thickness (0.449 inches) before installation
• Verify compatibility with vehicle model and year using part number 128.35090L
• Use proper torque specifications for the 5 lug/stud holes with 0.602 inch diameter
• Inspect brake pads and calipers during rotor replacement for optimal performance
• Clean rotor surface before installation to remove any protective coatings or debris

Quality Assurance and Warranty

StopTech Sport Cross-Drilled Disc Brake Rotors are manufactured to meet OEM standards for fit, form, and function. The 128.35090L rotor undergoes rigorous quality control to ensure durability and consistent braking performance. While specific warranty details are not provided here, StopTech products typically come with manufacturer-backed warranties covering defects in materials and workmanship. Always consult the product documentation or manufacturer for exact warranty terms.