Please wait… 
Please wait while we process your order,
do not press the back button… 
Design911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://www.design911.co.uk/images/schemaLogo.png https://www.design911.co.uk/images/schemaLogo.png https://www.design911.co.uk Facebook Instagram
Porsche specialists based in the UK
Porsche > Cayenne 9PA (955) 2003-2006 > 955 Cayenne 3.2L V6 2003-06 > Brakes >

Brake Servo | Booster

Brake Servo | Booster

Filter by brand
DISPLAYING 1 to 8 (of 8 products)
Brake Booster Vacuum Line, For Right Hand Drive (RHD). Porsche 955 / 957 Cayenne 2003-10 - 95535557805
2
Brake Booster Vacuum Line, For Right Hand Drive (RHD). Porsche 955 / 957 Cayenne 2003-10
Special Order item
95535557805
Product Information
Product Information

Brake Booster Vacuum Line, For Right Hand Drive (RHD).
The Porsche Brake Booster Vacuum Line is a genuine replacement vacuum pipe designed for right-hand-drive Porsche Cayenne models.

Fits:

  • Porsche 955 Cayenne 3.2L V6 2003-06
  • Porsche 955 Cayenne S 4.5L V8 2003-06
  • Porsche 955 Cayenne Turbo 4.5L 2003-06
  • Porsche 955 Cayenne Turbo S 4.5L 2006>>
  • Porsche 957 Cayenne 3.0L Diesel 2007-10
  • Porsche 957 Cayenne 3.6L 2007-10
  • Porsche 957 Cayenne S / GTS 4.8L 2007-10
  • Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10  

Diagram Ref No 13

The line forms part of the brake servo system, carrying vacuum to the brake booster so that additional assistance can be applied when the driver presses the brake pedal.

A properly sealed vacuum line is essential for maintaining effective brake assistance. If the original pipe becomes cracked, damaged or develops a leak, the brake booster may not receive sufficient vacuum, resulting in increased pedal effort and reduced braking assistance.

This genuine Porsche replacement restores the correct vacuum connection and factory routing within the braking system.

What This Product Does:
The brake booster, also known as the brake servo, uses vacuum assistance to reduce the amount of physical force required from the driver when applying the brakes.

The vacuum line provides the connection through which vacuum reaches the brake booster.

Its primary functions include:

  • Supplying vacuum to the brake booster
  • Maintaining a sealed vacuum circuit
  • Supporting power-assisted braking
  • Reducing the amount of pedal effort required during braking
  • Helping provide consistent brake pedal assistance
  • Maintaining the correct factory routing of the vacuum system
  • Connecting the brake servo to the relevant vacuum supply components

The vacuum line does not create braking pressure itself. Instead, it allows the brake booster to assist the hydraulic braking system.

Symptoms Of Wear Or Failure:
Vacuum lines can deteriorate through age, engine-bay heat, vibration and repeated pressure changes.

Common symptoms of a damaged or leaking brake booster vacuum line include:

  • Brake pedal becoming unusually hard
  • Increased effort required to stop the vehicle
  • Reduced brake servo assistance
  • Brakes feeling normal initially but becoming harder after repeated applications
  • Hissing or sucking noise when the brake pedal is pressed
  • Audible vacuum leak from the engine compartment
  • Cracks or splits in the vacuum pipe
  • Damaged or loose connections
  • Vacuum hose becoming brittle or hardened
  • Physical damage to the line
  • Brake booster performance becoming inconsistent
  • Vacuum-related fault codes where monitored by the vehicle
  • Poor sealing around vacuum-line connections

A hard brake pedal can also be caused by a faulty brake booster, vacuum pump, non-return valve or related vacuum-system component, so correct diagnosis is recommended before replacement.

Why Replacement Matters:
The brake booster significantly reduces the physical effort required to apply the brakes.

If the vacuum line leaks or becomes disconnected, the booster may not receive enough vacuum to provide normal assistance. The hydraulic braking system may still operate, but substantially more pedal force can be required from the driver.

This can make the vehicle more difficult to stop comfortably and predictably, particularly during emergency braking or repeated brake applications.

A vacuum leak can also prevent the brake servo from storing or maintaining sufficient vacuum between braking events.

Replacing a damaged vacuum line helps restore:

  • Correct brake booster vacuum supply
  • Normal power-assisted braking
  • Consistent brake pedal effort
  • Reliable brake servo operation
  • Proper sealing of the vacuum circuit
  • Factory-correct hose routing and connections

Because this component forms part of the braking assistance system, cracks, leaks or damaged connections should not be ignored.



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

95535557805
95535557805

The product you are viewing cross references to these numbers
Brake Booster. Porsche Cayenne 955 MKI RHD - 95535592401, 95535592400
3
Brake Booster. Porsche Cayenne 955 MKI RHD
Special Order item
95535592401
Product Information
Product Information
Brake Booster.



Fits:
Porsche 955 Cayenne RHD 2003-2006

Click 'Zoom in' for large parts diagram
Diagram ref no 8

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

95535592401
95535592401
95535592400

The product you are viewing cross references to these numbers
Brake fluid DOT 4 20ltr Textar
1
Brake fluid DOT 4 20ltr Textar
95002500
Product Information
Product Information
Brake fluid DOT 4 20Ltr Textar



Brake fluid is one of the most important fluids in a car as without it, stopping the vehicle safely would be impossible. The Brake fluid transmits the force exerted by the driver on the brake pedal onto the wheel brake. 
To ensure perfect operation of the brakes, the brake fluid must be changed regularly during inspection or maintenance and tested with the correct brake fluid tester.

Brake fluid should be changed every two years. 

The higher the DOT class, the higher the boiling temperature and wet boiling point. Higher DOT classes tend to allow longer maintenance intervals. The DOT standards are based on the American FMVSS-116 standard of the Department of Transportation (DOT).

Boiling Point and Viscosity

Dry Boiling Point - describes the property of the sealed new brake fluid. In this state, the brake fluid is almost anhydrous (substance containing no water). The dry boiling point is usually between 240 and 280°C.

Wet Boiling Point - determines the property of the brake fluid at the end of its life cycle, at a water content of 3.5% the fluid should be replaced. This defined wet boiling point must not be undercut.

Viscosity - describes the flow rate of the brake fluid. The lower the viscosity, the faster the brake fluid flows through the brake system, and the faster the brake signals are transmitted. 

Important Notes
• Brake fluid is poisonous and a hazardous waste.
• Be careful when changing. The fluid weakens paints and plastics.
• It must not come into contact with eyes or skin. Always rinse spilled liquid with water.
• Do not pour the liquid into drinking water or mix with used oil.
• The colour of the brake fluid reveals nothing about its quality.
• Brake fluid should be stored in its original packaging and in a dry, cool and well-ventilated place.



Find out about Textar product verification here
PLEASE NOTE:
Due to its size, weight or fragility, this item requires additional protective packaging to make sure it reaches you undamaged. A small packing surcharge is applied to cover these specialist materials and the extra care taken preparing your order for transit.
Brake Fluid DOT 4 Brembo Premium Brake Fluid - 00004320209, 00004320366, 00004321082, 00004330552 - L04005, L04010, L04050
7
Brake Fluid DOT 4 Brembo Premium Brake Fluid
L040
Product Information
Product Information
Brake discs, calipers, pads and brake master cylinders are the four cardinal points of each brake system; however, they are likely to be useless without the core of the entire system, the brake fluid. This component is so neglected as to be generally controlled in a summary fashion, with topping instead of a more appropriate replacement, at the change frequency recommended by the manufacturer.


DOT 4
Having an extremely high boiling point and lower viscosity than required, it meets and greatly exceeds regulatory standards. Also suitable for vehicles with ABS.

Vapour Lock formation
This sort of habit leaves room for the Vapour Lock, the formation of vapour bubbles due to boiling of the brake fluid that replace the normal fluid and are compressed, thereby sending the brake pedal to its fill stoke (spongy pedal). The origin is incident in the porosity of the tubes that make up the braking circuit, which in time draw moisture into the fluid, drastically reducing the boiling point. The result is a reduced braking efficiency.

Brembo Premium Brake Fluid
Brembo Premium brake fluids have a higher boiling point that exceeds the standard, thus offering superior resistance to the Vapour Lock and ensuring braking efficiency even at low temperatures. With high anti-corrosion properties and resistance to oxidation, Brembo brake fluid also allows for long-term unaltered chemical/physical characteristics of the fluid in operating circuit; therefore, preserving its integrity.



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

L040
00004320209
00004320366
00004321082
00004330552

The product you are viewing cross references to these numbers
Brake fluid DOT 4 LV (Low Viscosity) Textar. - 00004330552, 00004320366, 00004321082, 00004320209
5
Brake fluid DOT 4 LV (Low Viscosity) Textar.
95006
Product Information
Product Information

Brake fluid DOT 4 LV (Low Viscosity) Textar.


Textar DOT 4 LV (Low Viscosity) is especially recommended for use in hydraulic brake and clutch systems of vehicles fitted with ESP, ABS and ASR with a high boiling point and outstanding performance at very low temperatures.

DOT 4 LV (Low Viscosity)
Dry Boiling Point ≥ 260° C 
Wet Boiling Point ≥ 165° C 
Viscosity at -40C < 750 mm2 /s

Brake fluid is one of the most important fluids in a car as without it, stopping the vehicle safely would be impossible. The Brake fluid transmits the force exerted by the driver on the brake pedal onto the wheel brake. 
To ensure perfect operation of the brakes, the brake fluid must be changed regularly during inspection or maintenance and tested with the correct brake fluid tester.

Brake fluid should be changed every two years. 

The higher the DOT class, the higher the boiling temperature and wet boiling point. Higher DOT classes tend to allow longer maintenance intervals. The DOT standards are based on the American FMVSS-116 standard of the Department of Transportation (DOT).

Boiling Point and Viscosity

Dry Boiling Point - describes the property of the sealed new brake fluid. In this state, the brake fluid is almost anhydrous (substance containing no water). The dry boiling point is usually between 240 and 280°C.

Wet Boiling Point - determines the property of the brake fluid at the end of its life cycle, at a water content of 3.5% the fluid should be replaced. This defined wet boiling point must not be undercut. <

Viscosity - describes the flow rate of the brake fluid. The lower the viscosity, the faster the brake fluid flows through the brake system, and the faster the brake signals are transmitted. 

Important Notes

• Brake fluid is poisonous and a hazardous waste.
• Be careful when changing. The fluid weakens paints and plastics.
• It must not come into contact with eyes or skin. Always rinse spilled liquid with water.
• Do not pour the liquid into drinking water or mix with used oil.
• The colour of the brake fluid reveals nothing about its quality.
• Brake fluid should be stored in its original packaging and in a dry, cool and well-ventilated place.



Find out about Textar product verification here

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

95006
00004330552
00004320366
00004321082
00004320209

The product you are viewing cross references to these numbers
Brake fluid dot 4 Textar - 00004430501, 00004321082, 00004330552, 00004320366, 00004320209
6
Brake fluid dot 4 Textar
95002
Product Information
Product Information
Brake fluid DOT 4 



Brake fluid is one of the most important fluids in a car as without it, stopping the vehicle safely would be impossible. The Brake fluid transmits the force exerted by the driver on the brake pedal onto the wheel brake. 

To ensure perfect operation of the brakes, the brake fluid must be changed regularly during inspection or maintenance and tested with the correct brake fluid tester.

Brake fluid should be changed every two years. 

The higher the DOT class, the higher the boiling temperature and wet boiling point. Higher DOT classes tend to allow longer maintenance intervals. The DOT standards are based on the American FMVSS-116 standard of the Department of Transportation (DOT).

Boiling Point and Viscosity

Dry Boiling Point - describes the property of the sealed new brake fluid. In this state, the brake fluid is almost anhydrous (substance containing no water). The dry boiling point is usually between 240 and 280°C.

Wet Boiling Point - determines the property of the brake fluid at the end of its life cycle, at a water content of 3.5% the fluid should be replaced. This defined wet boiling point must not be undercut. 

Viscosity - describes the flow rate of the brake fluid. The lower the viscosity, the faster the brake fluid flows through the brake system, and the faster the brake signals are transmitted. 

Important Notes
• Brake fluid is poisonous and a hazardous waste.
• Be careful when changing. The fluid weakens paints and plastics.
• It must not come into contact with eyes or skin. Always rinse spilled liquid with water.
• Do not pour the liquid into drinking water or mix with used oil.
• The colour of the brake fluid reveals nothing about its quality.
• Brake fluid should be stored in its original packaging and in a dry, cool and well-ventilated place.

Find out about Textar product verification here

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

95002
00004430501
00004321082
00004330552
00004320366
00004320209

The product you are viewing cross references to these numbers
Brake servo gasket. Porsche Cayenne 955 / 957 - 95535590101, 95535590100
3
Brake servo gasket. Porsche Cayenne 955 / 957
Special Order item
95535590101
Product Information
Product Information
Brake servo gasket.



Fits:
Porsche Cayenne MK1 (955) 2003-2006
Porsche Cayenne MK2 (957) 2007-2010

Click 'Zoom in' for large parts diagram
Diagram ref no 8

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

95535590101
95535590101
95535590100

The product you are viewing cross references to these numbers
Halo GT Advanced DOT 4 Racing Brake Fluid - 600ml - 00004320209, 00004320366, 00004321082, 00004330552 - L04005, L04010, L04050
1
Halo GT Advanced DOT 4 Racing Brake Fluid - 600ml
GTEUK198L2
Product Information
Product Information
Halo GT Advanced DOT 4 Racing Brake Fluid
600ml aluminium bottle

Halo GT is the latest formulation with a DOT 4 base suitable for the demands of motorsport (such as low compressibility and low viscosity). It has a dry boiling point of 336 degrees Celsius which is higher than the Brembo HT64. Whilst withstanding the demands of motorsport, Halo GT is suitable for track day use.

Brake Later. Release Faster. Accelerate earlier. Every Lap.

Halo GT is the ultimate DOT 4 racing brake fluid, fully compliant and optimized for the latest racing ABS systems. Engineered for ultra-fast response, thermal stability, and consistent pedal feel under the most demanding race conditions.

FEATURES

01 | Derived from P1 Proven under extreme conditions. Built on Halo P1 chemistry, developed for the highest demands of motorsport.

02 | Designed for GT racing The ultimate in DOT 4 racing brake fluid, fully compliant and optimized for use with the latest racing ABS systems.

03 | Ultra low viscosity Faster system response for immediate feedback and precise control.

04 | Fade Resistant Technology™ Performance that lasts. Maintains consistent pedal feel under repeated heat cycles with minimal fade as temperatures rise.

05 | Corner focused Control where it matters most. Optimised for braking zones, release precision, and clean transition back to throttle.


Performance benefits

Sharper response. Better control. Faster exits from start to finish.
•  Faster hydraulic response under load
•  Greater stability through repeated braking cycles
•  Quicker piston release for reduced drag
•  More precise brake modulation
•  Reduced thermal stress in extreme conditions
•  Earlier throttle application on corner exit

Speed of Response.
Speed on Track. Modern Braking Systems demand instant response. Halo GT’s ultra-low viscosity allows the brake system to respond faster, improving communication between driver and car.
Faster pressure build-up. Cleaner release. Greater control at the limit.
Brake later. Release faster. Accelerate earlier.

Most races are won in the corner.
Anyone can be fast on the straight. But cornering takes skill. Performance is defined under braking, through release, and on exit. Halo GT is engineered for these moments. Giving drivers the confidence to brake faster, carry speed through the corner, and accelerate earlier. And continue to do that consistently, lap after lap.

For GT drivers who understand Performance.
Not for Everyone. Built for those who demand more.
Also suitable for Semi-Pro, Club Racing and Trackday performance drivers.

Technical Specification.

•  336°C dry boiling point
•  Ultra-low viscosity of 1350 cSt

Designed to maintain consistent performance under heat and repeated load, with full data available for detailed evaluation.



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

GTEUK198L2
00004320209
00004320366
00004321082
00004330552

The product you are viewing cross references to these numbers
DISPLAYING 1 to 8 (of 8 products)
Also found on these pages
About Brake Servo | Booster

Porsche Brake Servo / Booster | Design911 Precision Replacement Parts for Enhanced Braking Power & Control

The brake servo, also known as the brake booster, is a crucial component in your Porsche’s braking system. It uses engine vacuum or hydraulic pressure to amplify the force applied to the brake pedal, making braking smoother, more responsive, and less physically demanding. A properly functioning servo ensures effortless braking and preserves Porsche’s signature pedal feel. When it begins to fail, pedal pressure increases, and braking performance declines — making replacement essential for safety and comfort.

At Design911, we supply a wide range of brake servos and boosters, engineered for exact fitment and long-term reliability. Each unit is manufactured using premium materials and advanced sealing technology to deliver consistent vacuum assistance and hydraulic integrity. Whether for road use, restoration, or performance upgrades, our brake servos ensure the precision braking your Porsche deserves.

What Does a Brake Servo / Booster Do?

The brake servo multiplies the force from the brake pedal before transmitting it to the master cylinder, reducing the effort required to slow the vehicle.

Core Functions:
• Amplifies pedal force for enhanced braking efficiency.
• Provides smooth and responsive brake pedal feel.
• Supports consistent braking performance across varying speeds.
• Helps maintain driver comfort and control during deceleration.
• Works in conjunction with ABS and stability systems for balance and safety.

An efficient servo system ensures your Porsche brakes with the precision, strength, and responsiveness it was engineered for.

Why Do Brake Servos / Boosters Fail or Degrade?

Over time, servos are exposed to vacuum pressure, moisture, and mechanical wear that can affect their internal seals, diaphragm, or valves.

Common Causes of Failure Include:
• Vacuum leaks caused by worn or cracked diaphragms.
• Corrosion or moisture ingress affecting internal components.
• Broken check valves or damaged seals.
• Reduced vacuum supply due to engine issues.
• Age-related wear in the booster mechanism.

When the servo fails, drivers may experience a hard brake pedal, increased stopping distance, or inconsistent braking assistance — compromising safety and performance.

Why Replace or Upgrade Your Porsche Brake Servo / Booster?

Replacing a failing or inefficient brake servo restores correct braking assistance and ensures safe, predictable braking response. Design911’s precision-engineered servos are designed for durability, direct fitment, and compatibility across Porsche models.

Key Benefits:
• Restores proper brake assistance and pedal feel.
• Improves braking comfort and control.
• Constructed with corrosion-resistant materials for longevity.
• Engineered for consistent vacuum and hydraulic performance.
• Direct-fit design ensures easy installation.
• Suitable for classic and modern Porsche vehicles.

Design911’s Porsche brake servos and boosters deliver the confidence and reliability required for every driving situation — from city traffic to high-speed performance.

Highlights

• Premium Porsche brake servos and boosters.
• Precision-engineered for hydraulic and vacuum efficiency.
• Restores effortless braking power and smooth pedal response.
• Corrosion-resistant construction for long service life.
• Ideal for performance, restoration, or maintenance applications.
• Compatible with a wide range of Porsche models.

You may also like
Popular Models