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Brake Master Cylinder
By OE Match
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
OE Match quality replacement for the original Porsche unit referenced by part number 997.355.910.00 / 99735591000. The brake master cylinder converts the force applied to the brake pedal into hydraulic pressure that activates your brake calipers and slows the car. It ensures consistent braking force and modulation under daily driving or spirited use. Without a fully functioning master cylinder, braking performance can be compromised.
Fits:
Porsche 987.1 Boxster 2005 - 2008
Porsche 987.2 Boxster 2009 - 2012
Porsche 987C.1 Cayman 2006 - 2008
Porsche 987C.2 Cayman 2009 - 2012
Porsche 997.1 Carrera 2 2005 - 2008
Diagram ref no 5
Function: It houses pistons and seals that pressurize brake fluid and distribute appropriate pressure to front and rear brake circuits. When you press the brake pedal, this unit ensures the correct volume and pressure of fluid is sent through the lines for dependable stopping power.
Replacing a worn or failing master cylinder is critical for safe braking performance. Over time, internal seals deteriorate, leading to spongy pedal feel, reduced brake responsiveness, or loss of hydraulic pressure. Installing a high-quality OE Match unit restores proper brake pressure, improves pedal feel, and ensures consistent stopping power - essential for both everyday driving and performance scenarios.
When to replace
You should inspect and consider replacing your brake master cylinder if you notice any of the following:
• Brake pedal feels soft, spongy, or sinking
• Visible brake fluid leaks around the firewall or master cylinder
• Inconsistent brake pressure during stopping
• Warning lights on the dashboard indicating brake system issues
• Age-related wear or part has exceeded recommended service life
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99735591000
The product you are viewing cross references to these numbers
OEMatch Brake Master Cylinder — Fit, Function, Confidence
OEMatch supplies a broad selection of parts for Porsche models, with a large catalogue of part numbers and extensive OE cross-references to support restorations and repairs. These replacement master cylinders are intended to restore reliable hydraulic control and a consistent pedal feel across road and track use.
Available Types
- Replacement units for classic Porsche restoration
- Replacement units for modern Porsche road models
- Units suited to road and motorsport preparation
Understanding OEMatch Brake Master Cylinder
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original brake master cylinder. OE (Original Equipment) refers to parts matching original specifications for the brake master cylinder and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM brake master cylinder engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
The brake master cylinder converts pedal pressure into hydraulic force that operates the brake calipers. It maintains even brake force distribution, supports ABS and traction control systems where fitted, and sustains a firm, predictable pedal feel when functioning correctly.
Benefits Include
- Restores safe and consistent braking performance and pedal feel
- Prevents fluid leaks and loss of hydraulic pressure
- Maintains correct brake balance across all wheels
- Constructed to resist corrosion and withstand thermal cycling
Why Brake Master Cylinder Wear and Fail
- Worn internal seals leading to pressure loss or external leaks
- Corrosion from moisture-contaminated brake fluid
- Scored or pitted cylinder bores that reduce seal integrity
- Air ingress or age-related degradation of rubber components
The Importance of Replacing with OEMatch Brake Master Cylinder
Timely replacement restores full hydraulic pressure and consistent braking response, helping to preserve control and safety for Porsche models. A serviceable master cylinder reduces the risk of spongy pedals, fluid loss and uneven brake performance while supporting systems such as ABS that depend on stable hydraulic input.
Advantages
- Manufactured to original-spec dimensions and tolerances for fit and function
- Suitable for both classic restoration and modern Porsche applications
- Supported by OEMatch’s catalogueuing and cross-references for easier part identification
Support & Advice
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified.
