Brake Fluid Reservoir
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.
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Brake Fluid DOT 4 Brembo Premium Brake Fluid

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.
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Related, superseded, cross reference or alternative numbers for comparison.
L040
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Brake fluid DOT 4 LV (Low Viscosity) Textar.
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
Worldwide Delivery
Brake fluid dot 4 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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95002
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Brake Fluid Reservoir Cap. Porsche 986/987 Boxster / 987C Cayman / 996 / 997
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-2012
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12

Fits:
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987.2 Boxster 2008-12
Porsche 987C.1 Cayman 2005-08
Porsche 987C Cayman 2009-12
Porsche 996 1998-05
Porsche 997.1 2005-08
Porsche 997.2 2009-12
Click 'Zoom in' for large parts diagram.
Diagram ref no 2.
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99635511901
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Brake Fluid Reservoir. Porsche 996 / 986 Boxster MANUAL
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04

Fits:
Porsche 986 Boxster 1997-05 Cars with 5-Speed and 6-Speed Manual Transmission
Porsche 996 C2 1998-05 Cars with 6-speed manual transmission
Porsche 996 GT2 2001-05
Porsche 996 GT3 1998-05
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99635501301
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Porsche Brake Fluid Reservoir | Design911 Precision Replacement Parts for Reliable Hydraulic Performance & Safety
The brake fluid reservoir is a critical component in your Porsche’s braking system, storing hydraulic fluid and supplying consistent pressure to the master cylinder. It ensures your brake system remains sealed, properly pressurised, and protected from contamination. A damaged or degraded reservoir can lead to leaks, air ingress, and reduced braking performance — making timely inspection and replacement essential for safety and reliability.
At Design911, we offer a full range of brake fluid reservoirs designed for perfect fitment, durability, and compatibility across classic and modern models. Manufactured from high-strength, heat-resistant polymers, each unit provides a secure seal and optimal performance under demanding conditions. Ideal for servicing, restoration, or performance maintenance, these reservoirs keep your Porsche’s braking system functioning as precisely as it was engineered to.
What Does a Brake Fluid Reservoir Do?
The brake fluid reservoir maintains hydraulic pressure and ensures the braking system operates safely and effectively at all times.
Core Functions:
• Holds and supplies brake fluid to the master cylinder.
• Maintains proper hydraulic pressure in the braking system.
• Prevents air, moisture, and contaminants from entering the fluid.
• Allows for visual inspection of fluid level and condition.
• Supports reliable braking response under all conditions.
A properly functioning reservoir ensures your Porsche’s braking system performs with precision, consistency, and confidence.
Why Do Brake Fluid Reservoirs Fail or Degrade?
Over time, the brake fluid reservoir can deteriorate due to heat, age, and exposure to hydraulic fluid. When cracks, leaks, or contamination occur, the integrity of the braking system is compromised.
Common Causes of Failure Include:
• Plastic fatigue or cracking from heat and vibration.
• Leaking seals or connections at the master cylinder.
• Contamination from moisture or debris entering the reservoir.
• Discolouration or clouding that obscures fluid level visibility.
• Wear from prolonged exposure to hydraulic fluid or UV damage.
When the reservoir fails, it can lead to fluid loss, air in the braking system, and diminished pedal response — all of which affect driving safety and control.
Why Replace Your Porsche Brake Fluid Reservoir?
Replacing a worn or damaged reservoir restores proper hydraulic pressure and ensures your braking system operates safely and efficiently. Design911’s high-quality replacements are designed for exact fitment and resilience in both everyday and performance applications.
Key Benefits:
• Restores full braking system reliability and safety.
• Prevents leaks, air ingress, and fluid contamination.
• Constructed from durable, heat- and fluid-resistant materials.
• Compatible with standard and high-performance brake fluids.
• Direct-fit design for easy installation and maintenance.
• Suitable for classic and modern Porsche models.
Design911’s Porsche brake fluid reservoirs are built for long-lasting durability, ensuring precise hydraulic performance and peace of mind behind the wheel.
Highlights
• Premium Porsche brake fluid reservoirs for all models.
• High-strength materials for durability and heat resistance.
• Ensures consistent hydraulic pressure and performance.
• Protects brake fluid from contamination and moisture.
• Perfect for restoration, maintenance, or performance upgrades.
• Designed for easy installation and long-term reliability.