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Porsche > 356 (1950-1965) > Hydraulics >

Reservoir / Tank

Reservoir / Tank

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Brake fluid reservoir with lid. Porsche 356C / 911/912 65-67 - 69535501300
2
Brake fluid reservoir with lid. Porsche 356C / 911/912 65-67
Special Order item
69535501300
Product Information
Product Information
Brake fluid reservoir with lid.

porsche

Fits:
Porsche 356 C 1960-65
Porsche 911/912 1965-67

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Diagram ref no 1

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Related, superseded, cross reference or alternative numbers for comparison.

69535501300
69535501300

The product you are viewing cross references to these numbers
Brake fluid reservoir. Porsche 356 /A/B - 35642091 - 1661200100
3
Brake fluid reservoir. Porsche 356 /A/B
35642091/1
Product Information
Product Information
Brake Fluid Tank, Aluminium OE Look, Without Cap.
Restore a key part of the braking hydraulic system while maintaining a period-correct appearance with this OE Match Aluminium Brake Fluid Tank. Manufactured in aluminium with an OE-style appearance, this reservoir is designed for compatible classic vehicle applications where originality, durability, and reliable brake fluid storage are important.

Fits:
Porsche 356 - 1950 to 1955
Porsche 356A - 1955 to 1959
Porsche 356B - 1959 to 1963

Diagram Ref No 16

The brake fluid tank stores the hydraulic fluid required by the braking system. As the brakes are applied, brake fluid transmits hydraulic pressure through the system, allowing the braking components at the wheels to operate. The reservoir provides a supply of fluid to the hydraulic circuit and allows the fluid level to be monitored and maintained.  

What This Product Does:
  • Stores the brake fluid required by the hydraulic braking system.
  • Maintains a reserve supply of fluid for the brake hydraulic circuit.
  • Helps ensure the braking system remains adequately supplied with fluid.
  • Allows the brake fluid level to be monitored and maintained.
  • Provides connection points for the associated hydraulic supply components.
  • Features aluminium construction for durability.
  • Provides an OE-style appearance suitable for classic vehicle restoration.
  • Replaces a corroded, leaking, damaged, or unsuitable brake fluid reservoir.
  • Helps maintain a clean and correctly presented braking system installation.
  • Is supplied without a reservoir cap.

Symptoms Of Wear Or Failure:
  • Brake fluid leaking from the reservoir.
  • Fluid wetness around the tank, seams, or connections.
  • A brake fluid level that repeatedly drops.
  • Visible corrosion or deterioration of the original reservoir.
  • Cracks, dents, deformation, or other physical damage.
  • Damaged or deteriorated hose connections.
  • Contamination visible inside the reservoir.
  • Difficulty maintaining a dependable seal around associated fittings.
  • A reservoir damaged during servicing or restoration.
  • An original tank that has deteriorated beyond reliable continued use.

Why Replacement Matters:

  • The brake fluid reservoir is an important part of the vehicle's hydraulic braking system. It must securely contain the fluid needed for reliable brake operation and prevent contamination from entering the hydraulic circuit.
  • A leaking reservoir can gradually reduce the brake fluid level. If the fluid level becomes sufficiently low, air may enter the hydraulic system. Air in the brake lines can result in a soft or spongy pedal and reduced braking effectiveness.
  • Brake fluid leakage should therefore never be ignored. Any unexplained loss of brake fluid requires immediate investigation because it can indicate a fault capable of compromising braking performance.
  • Corrosion or internal contamination is another reason to replace an ageing reservoir. Dirt, corrosion products, moisture, or other contaminants entering the hydraulic system can contribute to deterioration of master cylinders, wheel cylinders, calipers, and other braking components.



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

35642091
35642091

The product you are viewing cross references to these numbers
Brake fluid tank with black cap. Porsche 356C / 911/912 65-67 - 69535501300 - 695 355 013 00, 1661200400, PS9303
2
Brake fluid tank with black cap. Porsche 356C / 911/912 65-67
69535501300/1
Product Information
Product Information
Brake fluid tank with black cap

Fits:
Porsche 356 C 1.6 01/63-12/65
Porsche 911 2.0 01/63-07/67
Porsche 912 1.6 01/65-07/67

Diagram ref no 1

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

69535501300
69535501300

The product you are viewing cross references to these numbers
DISPLAYING 1 to 3 (of 3 products)
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About Reservoir / Tank

High-Quality Hydraulic Reservoirs & Tanks for Stable, Reliable Brake & Clutch Performance

Hydraulic reservoirs—also known as fluid tanks or expansion containers—store and supply hydraulic fluid for brake and clutch systems. These reservoirs ensure a stable fluid level, maintain pressure balance and prevent air from entering the hydraulic circuits. Whether used in performance vehicles, classic models or daily drivers, the reservoir plays a crucial role in keeping hydraulic systems responsive, consistent and safe.

A healthy reservoir ensures the brake and clutch systems always receive the correct amount of fluid, preventing pressure loss, contamination and system failure.

What Hydraulic Reservoirs & Tanks Do

Reservoirs and hydraulic tanks support the system by:

  • Storing brake or clutch fluid for use by the master cylinder
  • Maintaining correct fluid levels during temperature and pressure changes
  • Allowing fluid expansion to avoid over-pressurisation
  • Preventing air entry into the hydraulic system
  • Reducing contamination via filtered caps or sealed designs
  • Supporting consistent pedal feel during demanding conditions

A reliable reservoir helps ensure stable braking and clutch engagement across all temperatures and driving environments.

Why Hydraulic Reservoirs Commonly Fail

Despite being simple components, reservoirs are exposed to heat, vibration and corrosive fluids. Over time, they may deteriorate or fail due to:

  • Cracking or brittleness from age and UV exposure
  • Internal contamination from degraded seals or old fluid
  • Leaks caused by stress fractures or weakened hose connections
  • Discolouration or clouding, making fluid levels hard to read
  • Warped or loose caps leading to air entry
  • Corrosion on metal mounting points or fittings
  • Heat-related deformation reducing sealing effectiveness

Typical symptoms include fluid loss, soft pedal feel, brake warning lights, or inconsistent clutch operation.

Why You Should Replace a Worn or Damaged Hydraulic Reservoir

Replacing an old or failing reservoir with a high-quality, precision-built alternative designed to match original hydraulic performance ensures your vehicle’s braking and clutch systems remain safe and dependable.

Benefits include:

  • Restored fluid capacity and pressure stability
  • Clear fluid visibility for accurate level checks
  • Prevention of leaks and air ingress
  • More consistent pedal feel in brake and clutch systems
  • Reduced risk of contamination and hydraulic failure
  • Improved long-term safety and reliability

A new reservoir is a simple, cost-effective upgrade that protects the entire hydraulic system.

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