Surcharge for Reconditioned Unit - Pump 993355953AX Genuine Porsche part 993355953AU

Brake master cylinder. 
A genuine Porsche original equipment (OE) brake master cylinder it serves as the primary hydraulic pressure generator in the braking system of selected Porsche 911 models the 993 generation.

Fits:
Porsche 993 C2 1995 - 1998

Diagram ref no 9

The brake master cylinder is a critical hydraulic component in your vehicle’s braking system. When you press the brake pedal, this device generates hydraulic pressure that is transmitted through the brake lines to the brake calipers or wheel cylinders at each wheel. This hydraulic pressure forces the brake pads or shoes against the rotors or drums, slowing and stopping the vehicle. A properly functioning master cylinder ensures:
• Consistent brake pedal feel and response
• Balanced hydraulic pressure to all wheels
• Safe, predictable braking performance under all conditions

The master cylinder contains internal pistons and seals that pressurise brake fluid when actuated by the pedal. This pressurised fluid is then routed through the brake lines to the brake calipers, activating the braking force at the wheels. Because it directly influences braking behaviour and safety, the master cylinder must maintain proper internal seals and robust construction to prevent leaks and loss of pressure.

Over time, original master cylinders can wear, develop seal leakage, or lose internal resistance, resulting in:
• Soft or spongy brake pedal feel
• Reduced braking effectiveness
• Brake fluid leaks Uneven pressure distribution.

Replacing worn or failing units restores optimum hydraulic pressure and prolongs the life of your brake system - maintaining the braking performance Porsche engineered for your 993.

Replace the master cylinder if you notice:
•  Brake pedal that sinks toward the floor
•  Spongy or inconsistent braking feel
•  Visible brake fluid leakage from the master cylinder body
•  Brake performance degradation
•  During a full brake system overhaul

Related reference numbers
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99335591000

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Brake master cylinder.



Fits:
Porsche 993 C4 / Turbo / RS

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99335590301

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Reconditioned ABS pump with pressure switch.

Fits:
Porsche 964 C4
Porsche 964 Carrera RS
Porsche 993 C4/C4S (Not for TURBO-LOOK)
Porsche 993 Carrera RS

Diagram ref no 17

PLEASE NOTE:

• The surcharge for this reconditioned part will be refunded when the exchange unit is received and approved by us and the relevant manufacturer.
• Please note, surcharge refunds often take an average of 6 to 8 weeks to be approved by the manufacturer.
• Acceptance of the exchange part is at the manufacturer's discretion, based on the part being fit for reconditioning.
• All surcharges and exchanges are subject to our terms and conditions.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

993355953AX

The product you are viewing cross references to these numbers

ABS Hydraulic Unit.


Fits:
Porsche 993 C4 / C4S / Turbo
M224 - for cars with Automatic limited slip differential

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99335595550

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Brake master cylinder - generates the hydraulic pressure required for the vehicle’s braking system and provides correct brake pedal feel and response.

Fits:
Porsche 993 C2 1995 - 1998

Diagram ref no 9

The brake master cylinder is a core hydraulic component in the braking system that converts the mechanical force from the brake pedal into hydraulic pressure. This pressure is transmitted through brake lines to the brake calipers at each wheel, enabling the vehicle to slow and stop effectively. Proper function of the master cylinder is essential for consistent brake feel and safe stopping performance.

The brake master cylinder is essential for safe operation of the brake system. Over time, internal seals and components can wear, leading to:
• Soft or spongy brake pedal feel
• Reduced hydraulic pressure
• Inconsistent stopping distances
• Visible fluid leaks under the dash or near the cylinder.

Replacing a worn or failing master cylinder with a TRW replacement restores proper hydraulic pressure, improves brake responsiveness, and enhances overall safety - especially critical on performance vehicles like the Porsche 911.

Replace this master cylinder if you notice:
• Brake pedal sinks or feels spongy
• Decreased brake performance
• Internal or external fluid leaks
• During a full brake system overhaul or restoration
• When upgrading to OEM-spec braking components

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99335591000

The product you are viewing cross references to these numbers

Reconditioned ABS pressure switch.



Fits:
Porsche 964 C2 / C4 / RS 1989-94
Porsche 993 Carrera RS 1995>> M339


PLEASE NOTE:

• The surcharge for this reconditioned part will be refunded when the exchange unit is received and approved by us and the relevant manufacturer.
• Please note, surcharge refunds often take an average of 6 to 8 weeks to be approved by the manufacturer.
• Acceptance of the exchange part is at the manufacturer's discretion, based on the part being fit for reconditioning.
• All surcharges and exchanges are subject to our terms and conditions.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

964606904AX

The product you are viewing cross references to these numbers

Brake master cylinder.
The primary hydraulic pressure generator for the braking system - translates your brake pedal input into brake fluid pressure that activates the brake calipers.

Fits:
Porsche 993 C2 1995 - 1998

Diagram ref no 9

When you press the brake pedal, the master cylinder generates hydraulic pressure that is distributed through the brake lines to all four wheels. This pressure forces the brake calipers to clamp the brake pads against the rotors, slowing the vehicle safely and effectively. A properly functioning master cylinder is essential for consistent brake pedal feel, stopping distance, and overall safety.

Function:
• Converts pedal force into hydraulic pressure to actuate the braking system
• Maintains proper fluid pressure to ensure balanced braking front to rear
• Works with the vehicle’s brake lines, reservoir, and calipers to deliver responsive braking performance on demand.

The master cylinder is a critical safety component of your braking system. Over time, seals and internal surfaces can wear or deteriorate, leading to:
• Spongy or inconsistent pedal feel
• Brake fluid leaks or loss of pressure
• Reduced braking performance or uneven stopping
• Potential safety hazards if left unaddressed.

Replacing a worn or failing unit helps restore proper hydraulic pressure, pedal feel, and brake system performance - keeping your Porsche responsive and safe.

Replace the brake master cylinder if you notice:
• Soft, sinking, or inconsistent brake pedal feel
• Visible brake fluid leaks around the master cylinder
• Air entering the brake lines or ineffective braking response
• During a brake system rebuild, fluid flushing, or seal failure diagnostics

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99335591000

The product you are viewing cross references to these numbers