Bosch 42011136 Disc Brake Rotor - Front Left

Bosch QuietCast Rotor for Porsche Front Left

The Bosch QuietCast Rotor 42011136 is a front left disc brake rotor for select Porsche applications. Built for 318mm cast iron front brake setups, it supports precise brake service on Porsche Boxster, Cayman, and 911 models.

Key Features

• Bosch QuietCast Rotor line for front brake replacement
• Front left position for driver-side service
• 318mm cast iron rotor application
• Product height: 2.637795 in
• Direct fit for select Porsche Boxster, Cayman, and 911 models
• Part number 42011136 for accurate ordering and lookup

Detailed Description

Bosch QuietCast Rotor 42011136 is a disc brake rotor engineered for front left use on select Porsche vehicles with a 318mm cast iron brake setup. This rotor is listed for 2000-2016 Porsche Boxster front left, 2006-2012 Porsche Cayman front left, and 1999-2010 Porsche 911 front left. The Bosch QuietCast Rotor line is positioned as a brake service solution for drivers replacing worn front rotors while maintaining the original brake configuration.

This part cross-references Porsche 99635140501 for the same application. If you are searching for a Porsche Boxster front left brake rotor, Porsche Cayman front left rotor, or Porsche 911 front left disc brake rotor, Bosch 42011136 matches the listed fitment data.

What It Helps Address

• Brake pulsation from rotor wear or uneven surface condition
• Scoring, grooves, or heat-related rotor damage
• Reduced braking consistency during normal street driving
• Front axle brake service on Porsche Boxster, Cayman, and 911 models
• Replacement of a driver-side front rotor with the correct 318mm specification

Installation Notes and Tips

Verify rotor diameter, front left position, and brake package details before installation. This rotor is listed only for the driver side front position shown in the fitment data, so confirm the vehicle year and model match the application exactly. Inspect pads, caliper condition, and hub surfaces during brake service to help ensure proper rotor seating and even braking performance.

Quality Assurance

Bosch QuietCast Rotor 42011136 is backed by Bosch brand manufacturing standards and OE-focused brake product engineering. Use the listed fitment data to confirm application before purchase.