Bosch 53011427 Disc Brake Rotor - Front

Bosch QuietCast Rotor for Mazda Front Brakes

The Bosch QuietCast Disc Brake Rotor, part number 53011427, is a front brake rotor built for select Mazda applications. It uses an iron alloy construction with a vented design, smooth brake surface, and Geomet disc finish to support consistent braking performance and corrosion resistance.

Compatible with 2016-2025 Mazda CX-5 front and 2019-2021 Mazda 6 front, this Bosch QuietCast rotor is a direct-fit replacement for drivers searching for a front brake rotor for Mazda CX-5 or Mazda 6. The 53011427 rotor also features a coated hat, rust-resistant coating, and directional brake surface for dependable service in everyday driving conditions.

Key Features

• Bosch QuietCast Disc Brake Rotor, part number 53011427
• Iron alloy construction with vented rotor design
• Smooth brake surface finish for consistent pad contact
• Geomet disc finish and coated hat for added corrosion protection
• Rust-resistant coating helps reduce surface oxidation
• 5-bolt mounting pattern with 114.3 mm bolt circle diameter
• 68 mm center bore diameter
• Conventional rotor design without hub assembly

Product Details

Bosch QuietCast brake rotors are part of Bosch’s QuietCast Disc Brake Rotor line, which focuses on OE-style replacement fitment and controlled surface finishing for everyday braking service. This rotor measures 297 mm outside diameter, 28 mm nominal thickness, and 51.5 mm overall height, with a 26 mm discard thickness specification. The directional, smooth braking surface and vented construction support heat management and stable pedal feel on front axle applications. If you are replacing a worn front rotor on a Mazda CX-5 or Mazda 6, the Bosch 53011427 provides the dimensions and mounting layout needed for the listed applications.

This part cross-references GBFT33251A and KD4533251 for the same application.

What This Rotor Helps Address

• Brake pulsation caused by rotor wear or thickness variation
• Reduced braking consistency from a scored or uneven rotor surface
• Corrosion on the braking surface or hat area
• Noise or vibration related to an aging front rotor
• Service replacement for a worn Mazda CX-5 or Mazda 6 front brake rotor

Installation Notes and Tips

Verify rotor diameter, center bore, bolt pattern, and thickness before installation. Clean the hub mounting surface thoroughly to help prevent runout, and inspect brake pads, caliper hardware, and wheel bearings during rotor replacement. Because this rotor is directional, confirm correct orientation during installation on the front axle.

Quality Assurance

Bosch QuietCast rotors are manufactured with corrosion-resistant finishes and OE-style dimensional control to support reliable brake service. Confirm fitment by vehicle year, model, and front position before ordering the Bosch 53011427.