HomeBrake > Brake HydraulicsTRW PMK328 Brake Master Cylinder
Part #: PMK328

TRW PMK328 Brake Master Cylinder

⚙️ 4 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Porsche, 911
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Overview of TRW PMK328 Brake Master Cylinder

The TRW PMK328 brake master cylinder is engineered for precise hydraulic brake control in Porsche 911 models. Designed with durable aluminum construction and essential features, this master cylinder supports reliable braking performance for your Porsche 911.

  • Constructed from lightweight, corrosion-resistant aluminum
  • Includes dust boot and gasket/seal for protection and leak prevention
  • Two mounting holes for secure installation
  • Straight bore type with a 23.81 mm bore diameter
  • Equipped with four ports and dual pistons for efficient brake fluid distribution

Detailed Product Description

The TRW PMK328 brake master cylinder is specifically designed for Porsche 911 vehicles, ensuring compatibility and optimal performance. Its aluminum body offers strength and resistance to corrosion, which is critical for maintaining brake system integrity over time. The master cylinder features a straight bore design with a 23.81 mm diameter, supporting consistent hydraulic pressure. Two pistons within the unit provide balanced brake fluid flow to the braking system. Included dust boots and gaskets help protect internal components from contaminants and prevent fluid leaks, contributing to the longevity and reliability of the brake hydraulics.

Applications and Problem Solving

  • Restores proper brake pedal feel and responsiveness in Porsche 911 brake systems
  • Addresses brake fluid leaks caused by worn or damaged seals
  • Replaces master cylinders with corroded or damaged aluminum bodies
  • Improves hydraulic pressure consistency for safer braking performance
  • Suitable for brake system rebuilds requiring a master cylinder with dual pistons and multiple ports

Installation Notes and Tips

When installing the TRW PMK328 brake master cylinder, ensure the mounting surface is clean and free of debris. Use the included gasket or seal to prevent fluid leaks. Note that mounting hardware and reservoir are not included and must be sourced separately. Bleeding the brake system thoroughly after installation is essential to remove air and restore proper hydraulic pressure. Verify compatibility with your Porsche 911 model year before installation.

Quality Assurance and Warranty

TRW manufactures the PMK328 brake master cylinder to meet strict quality standards, using durable aluminum and precision engineering. The included dust boot and gasket contribute to long-term reliability by protecting internal components. While specific warranty details are not provided here, TRW products typically come with manufacturer-backed warranties to ensure customer confidence in product durability and performance.

BrandTRW
Part NumberPMK328
Reservoir MaterialNone
Dust Boot IncludedYes
Mounting Hardware IncludedNo
Gasket Or Seal IncludedYes
Mounting Hole Quantity2
Master Cylinder Bore Diameter23.81
Bleeder Screw IncludedNo
Piston Quantity2
Brake Booster IncludedNo
Master Cylinder MaterialAluminum
Push Rod IncludedNo
Reservoir IncludedNo
Bleeder Hoses IncludedNo
Sensor IncludedNo
Port Quantity4
Mounting Bracket IncludedNo
Bore TypeStraight
Primary Outlet Thread SizeM12 - 1.0
Brake Pressure Switch RequiredNo
Brake Pressure Switch(s) IncludedNo
Primary Bore Diameter23.81

This part fits 4 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersFuel TypePositionNotes
1998Porsche911Carrera 4S3.6LH6GASN/A
1997Porsche911Carrera3.6LH6GASN/A
1996Porsche911Targa3.6LH6GASN/A
1995Porsche911Carrera 43.6LH6GASN/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.