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Porsche
Brake Servo Vacuum Line
Maintain the braking performance and safety of your Porsche
with this Genuine Porsche Brake Servo Vacuum Line. Manufactured to Porsche's
exact original equipment specifications, this factory-original vacuum line
ensures a reliable vacuum supply to the brake servo (brake booster), delivering
the light brake pedal feel, responsive braking and dependable performance
expected from your Porsche.
Fits:
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
Diagram ref no 12
The brake servo vacuum line is a vital part of the braking system. It transfers engine vacuum to the brake booster, reducing the effort required to apply the brakes. A damaged, leaking or deteriorated vacuum line can reduce brake assistance, resulting in a harder brake pedal and increased stopping distances.
Whether you're replacing a worn vacuum hose, repairing a vacuum leak or restoring your Cayenne to factory condition, choosing a Genuine Porsche component guarantees the correct fit, material quality and long-term reliability.
What Does the Brake Servo Vacuum Line Do?
The brake servo vacuum line connects the engine's vacuum source to the brake servo (brake booster), allowing vacuum pressure to assist braking.
Its functions include:
- Supplying vacuum to the brake servo.
- Reducing brake pedal effort.
- Maintaining consistent brake assistance.
- Supporting safe and predictable braking performance.
- Helping optimise emergency braking capability.
- Ensuring efficient operation of the brake booster system.
Without adequate vacuum, the brake servo cannot provide the assistance required for comfortable and effective braking.
Why Does the Brake Servo Vacuum Line Fail?
Vacuum lines are continually exposed to heat, vibration and engine movement, causing them to deteriorate over time.
Common causes of failure include:
- Age-related hardening of the hose.
- Heat damage from the engine bay.
- Cracks or splits developing in the line.
- Perished rubber connectors or seals.
- Damage during engine repairs.
- Loose or damaged fittings.
- Oil contamination degrading the hose material.
Even a small vacuum leak can significantly reduce brake servo performance.
Symptoms of a Failing Brake Servo Vacuum Line
Common signs include:
- Hard brake pedal.
- Increased pedal effort.
- Hissing noise from the engine bay.
- Reduced brake servo assistance.
- Poor braking feel.
- Vacuum leak fault codes.
- Cracked or visibly damaged vacuum hose.
- Reduced engine vacuum efficiency.
If any of these symptoms are present, the vacuum line should be inspected and replaced if necessary.
When Should the Brake Servo Vacuum Line Be Replaced?
Replacement is recommended when:
- Vacuum leaks are detected.
- The hose becomes cracked or brittle.
- Brake servo assistance is reduced.
- Engine work requires removal of the vacuum line.
- Carrying out preventative maintenance on older vehicles.
- Replacing the brake servo or associated vacuum components.
Replacing a deteriorated vacuum line helps restore braking performance and prevents future vacuum leaks.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95535557930
The product you are viewing cross references to these numbers
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
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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
The product you are viewing cross references to these numbers
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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
The product you are viewing cross references to these numbers
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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
The product you are viewing cross references to these numbers
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12 Month Warranty
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