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Pressure Accumulator
- Porsche 993 (911) TURBO 1994-96
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
This original Porsche pressure accumulator, also known as a pressure unit, forms part of the clutch hydraulic operating system and helps maintain stable hydraulic pressure for correct clutch operation.
Fits:
Porsche 993 Turbo 1994 - 1998
Porsche 996 Turbo / GT2 2000 - 2005
Porsche 997 Turbo / GT2 2007 - 2009
Diagram ref no 28
This component is used on selected Porsche Turbo clutch hydraulic systems, including 993TT, 996TT and 997TT applications.
What This Part Does / Functions
• Stores hydraulic pressure within the clutch operating system
• Helps support smooth and consistent clutch operation
• Assists the clutch slave cylinder hydraulic circuit
• Helps maintain stable pressure during clutch actuation
• Supports correct clutch engagement and disengagement
• Replaces a weak, faulty, leaking or failed pressure accumulator
• Provides correct OE Porsche hydraulic specification and fitment
• Supports reliable operation of the factory clutch hydraulic system.
Why Replace This Part?
The pressure accumulator is a hydraulic component that can weaken or fail over time due to internal diaphragm wear, pressure cycling, age, fluid condition or seal deterioration. If the accumulator no longer stores pressure correctly, the clutch hydraulic system may not operate as intended. Replacing it with an OE Genuine Porsche pressure accumulator helps restore correct hydraulic pressure reserve and supports reliable clutch operation on high-performance Turbo models.
Common Symptoms of a Faulty Pressure Accumulator
• Heavy, inconsistent or abnormal clutch pedal feel
• Difficulty selecting gears
• Clutch engagement or disengagement issues
• Hydraulic pressure loss in the clutch system
• Clutch slave cylinder operating faults
• Fluid leakage around the accumulator or hydraulic fittings
• Reduced clutch system response
• Fault confirmed during hydraulic clutch system diagnosis.
When to Replace This Part
• If the clutch hydraulic system is not holding pressure correctly
• If clutch operation becomes inconsistent or difficult
• If the accumulator is leaking or damaged
• During clutch slave cylinder or hydraulic line repair
• During gearbox or clutch system overhaul
• If hydraulic pressure testing confirms accumulator failure
Where It Fits on the Car
This pressure accumulator fits within the clutch hydraulic operating system, associated with the clutch slave cylinder / pressure line circuit on selected Porsche Turbo models.
Correct installation and bleeding procedures must always be followed. Clutch hydraulic components are critical to vehicle operation and should be fitted by a qualified technician.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99731416600
The product you are viewing cross references to these numbers
- Porsche 993 (911) TURBO 1994-96
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
OE Match pressure accumulator for Porsche 993 Turbo, 996 Turbo, and 997 Turbo models. This replacement hydraulic pressure accumulator helps maintain stored system pressure, supporting correct operation, smooth response, and reliable function within the applicable hydraulic system.
Fits:
Porsche 993 Turbo 1994 - 1998
Porsche 996 Turbo / GT2 2000 - 2005
Porsche 997 Turbo / GT2 2007 - 2009
Diagram ref no 28
The pressure accumulator stores hydraulic pressure and helps stabilise pressure supply during system operation. A correctly functioning accumulator helps maintain consistent pressure delivery, reduces pressure fluctuation, and supports reliable system response.
Functions
• Replaces the pressure accumulator
• Stores and maintains hydraulic pressure
• Helps stabilise pressure supply during operation
• Supports smooth and reliable hydraulic system response
• Helps reduce pressure fluctuation
• Suitable for hydraulic system service or fault repair
• OE Match replacement for Porsche Turbo models.
Why Replace This Part?
Pressure accumulators can weaken or fail due to age, internal diaphragm wear, repeated pressure cycling, fluid contamination, or long-term use. A faulty accumulator may cause poor pressure retention, warning messages, delayed operation, inconsistent response, or frequent system cycling. Replacing the accumulator helps restore correct hydraulic pressure storage and system reliability.
When to Replace This Part
• Hydraulic pressure is not being maintained correctly
• System operation is delayed, inconsistent, or noisy
• Warning light or fault code points to pressure storage issues
• Pump operation becomes more frequent than normal
• Accumulator fails diagnostic or pressure testing
• Hydraulic system service is being carried out
• The vehicle is undergoing Porsche Turbo maintenance or restoration.
Where it fits on the car
This pressure accumulator fits within the applicable hydraulic pressure system on Porsche 993 Turbo, 996 Turbo, and 997 Turbo models.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99731416600
The product you are viewing cross references to these numbers
Porsche Hydraulic Pressure Accumulators | Consistent System Pressure & Performance Stability
The hydraulic pressure accumulator is a vital component in your Porsche’s braking, suspension, or clutch system. It stores pressurised hydraulic fluid, ensuring consistent system pressure during operation. By compensating for pressure fluctuations and supplying reserve energy, it supports smooth brake modulation, steering response, and hydraulic actuation across the system.
At Design911, we supply high-quality hydraulic pressure accumulators engineered to meet or exceed original performance specifications. Each unit is built with precision diaphragms and durable internal components designed to handle extreme pressure, temperature changes, and long service life.
Whether maintaining your Porsche’s hydraulic system or upgrading for performance reliability, our pressure accumulators deliver stability, precision, and dependable performance.
What Does a Hydraulic Pressure Accumulator Do?
A hydraulic pressure accumulator stores energy in the form of pressurised fluid, maintaining steady hydraulic performance even under heavy load or rapid system demand.
Core Functions:
- Stores hydraulic pressure to stabilise system operation.
- Provides additional pressure for braking, clutch, or suspension systems.
- Reduces pressure surges and maintains consistent fluid flow.
- Ensures rapid response during high-demand conditions.
- Extends component life by reducing stress on pumps and valves.
Without a properly functioning accumulator, your Porsche may experience inconsistent hydraulic pressure, poor brake or clutch response, or delayed suspension adjustments.
Why Do Hydraulic Pressure Accumulators Fail or Degrade?
Pressure accumulators are subject to high internal pressure, temperature extremes, and natural wear over time — which can cause a gradual loss of performance.
Common Causes of Failure Include:
- Gas leakage from the nitrogen chamber.
- Internal diaphragm rupture or degradation.
- Hydraulic fluid contamination or corrosion.
- Worn seals or fittings causing pressure loss.
- Age-related fatigue leading to reduced capacity.
When a pressure accumulator begins to fail, you may notice warning lights, inconsistent brake or clutch response, or slow hydraulic operation.
Why Replace Your Porsche Hydraulic Pressure Accumulator?
Replacing a worn accumulator restores stable hydraulic performance, ensuring smooth and safe system operation across braking, steering, and clutch functions.
Key Benefits:
- Restores consistent hydraulic pressure and response.
- Prevents pump overloading and premature wear.
- Improves braking, steering, and clutch modulation.
- Eliminates hydraulic noise, pulsation, or delayed actuation.
- Compatible with Porsche 911, Boxster, Cayman, Panamera, Cayenne, Macan, and classic models.
- Ideal for hydraulic maintenance, performance upgrades, or complete system rebuilds.
Routine replacement ensures the entire hydraulic circuit maintains optimal operating pressure and reliability.
Highlights
- Precision-engineered Porsche hydraulic pressure accumulators.
- Designed for long-lasting performance and consistent pressure control.
- Suitable for brake, clutch, and suspension systems.
- Corrosion- and pressure-resistant materials for extended lifespan.
- Direct-fit replacement for Porsche hydraulic systems.
- Essential for performance reliability and system stability.
