Flexible brake cup hose Genuine Porsche part 99918102151

Brake fluid reservoir hose, Blue.
This OE Match brake fluid reservoir hose is a replacement hose for Porsche 911, 964, and 993 models. It is designed to match the original-style fitment and function, helping maintain a secure fluid connection between the brake fluid reservoir and the braking system.
Comes as 5m roll / Ø 7mm

Fits:
Porsche 911 1965 - 1989
Porsche 964 1989 - 1994
Porsche 993 1995 - 1998

The brake fluid reservoir hose carries brake fluid from the reservoir to the brake system feed connection. A secure, leak-free hose is essential for maintaining correct brake fluid supply, reducing the risk of fluid loss, and supporting reliable brake hydraulic system operation.

Functions
•  Replaces the brake fluid reservoir hose
•  Carries brake fluid from the reservoir to the brake system
•  Helps maintain a leak-free brake fluid connection
•  Supports correct brake hydraulic fluid supply
•  Helps prevent brake fluid seepage and contamination
•  Replaces aged, cracked, hardened, swollen, or leaking original hoses
•  OE Match replacement for brake system repair and restoration.

Why Replace This Part?
Brake fluid reservoir hoses can harden, crack, swell, soften, leak, or deteriorate over time due to age, brake fluid exposure, heat, and previous repairs. A failing hose may cause brake fluid seepage, low fluid levels, brake warning issues, fluid contamination, or damage to nearby painted surfaces. Replacing the hose helps restore safe, reliable brake fluid transfer and supports correct braking system maintenance.

When to Replace This Part
•   The hose is cracked, hardened, swollen, soft, brittle, or leaking
•   Brake fluid seepage is visible around the reservoir or hose connections
•   The brake fluid reservoir has been removed or replaced
•   Brake hydraulic system service is being carried out
•   The hose is contaminated or showing signs of age-related deterioration
•   Brake fluid level drops without another obvious cause
•   The car is undergoing Porsche 911, 964, or 993 brake system restoration

Where it fits on the car
This hose fits at the brake fluid reservoir area on Porsche 911, 964, and 993 models. It forms part of the brake fluid feed connection from the reservoir into the brake hydraulic system.

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Related, superseded, cross reference or alternative numbers for comparison.

99918102151

The product you are viewing cross references to these numbers

Brake fluid reservoir hose.
SOLD BY THE METRE

Fits:
Porsche 911
Porsche 964
Porsche 993

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

99918102151

The product you are viewing cross references to these numbers

Intake vacuum hose - Check valve to Venturi tube.



Fits:
Porsche 911 Carrera 3.2L 1984-89
Porsche 964 C2 / C4 3.6L 1989-94
Porsche 993 C2 / C4 3.6L 1995-98

Click 'Zoom in' for large parts diagram.
Diagram ref no 24

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

99918106841

The product you are viewing cross references to these numbers

Ventilation Hose For Carbon Canister.
NOT For Turbo Vehicles.

Fits:
Porsche 911 1978>>1983
Porsche 911 1984>>1986
Porsche 911 1987>>1989

Diagram Ref No 14

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

99918107241

The product you are viewing cross references to these numbers

Air Hose 12 x 3,7mm – Brake Servo & Inlet Manifold 
Sold by the metre

High-quality air hose designed for multiple Porsche applications, including brake servo (brake booster) systems and inlet manifold connections.

This hose is used on Porsche 911, 924, 928, 964 Carrera 2, and also within the inlet manifold system on 964 and 993 models. It plays a critical role in maintaining vacuum pressure for braking assistance and ensuring proper airflow within the intake system.

Fits:

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 993 (911) C2 1994-97
• Porsche 993 (911) C4 1994-97
• Porsche 993 (911) RS 1994-97
• Porsche 993 (911) C2S 1994-97
• Porsche 993 (911) C4S 1994-97
• Porsche 993 (911) TURBO 1994-96
• Porsche 993 (911) GT2 1994-97
• Porsche 993 (911) TURBO S 1994-97
• Porsche 924 2.0L 1976-79
• Porsche 924 2.0L 1980-85
• Porsche 924 Turbo 2.0L 1979-81
• Porsche 924 Turbo 2.0L 1982-84
• Porsche 924 Carrera GT 2.0L 1981
• Porsche 924 Carrera GTS 2.0L 1982
• Porsche 928 4.5L 1978-82
• Porsche 928S 4.7L 1981-83
• Porsche 928S2 4.7L 1984-86

Supplied per metre, this hose allows precise length replacement and flexible routing, making it ideal for maintenance, repair, or restoration of Porsche vacuum and intake systems. Manufactured to OEM specifications for durability and reliable performance.

Key Features

• Multi-purpose air hose for vacuum and intake systems
• Suitable for Porsche 911, 924, 928, 964, and 993
• Part number 9991810225B
• Used for brake servo and inlet manifold applications
• Sold per metre for custom lengths
• Resistant to heat and vacuum pressure
• Flexible and durable construction
• OEM-style fit and performance

Function and Purpose

This hose serves critical roles across multiple systems.

It helps to:
• Deliver vacuum pressure to the brake servo (booster)
• Maintain effective braking assistance
• Support airflow within the inlet manifold system
• Ensure stable engine operation and efficiency
• Prevent vacuum leaks that affect performance

Why Replace Air / Vacuum Hoses

Over time, hoses degrade due to heat and pressure cycles.

Common issues include:
• Cracking or splitting
• Vacuum leaks reducing brake efficiency
• Hardening and reduced flexibility
• Poor engine performance due to air leaks

Replacing worn hoses restores braking performance and engine efficiency.

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

9991810225B

The product you are viewing cross references to these numbers

Air Hose 12 x 3,7mm – Brake Servo & Inlet Manifold 
Sold by the metre

High-quality air hose designed for multiple Porsche applications, including brake servo (brake booster) systems and inlet manifold connections.

This hose is used on Porsche 911, 924, 928, 964 Carrera 2, and also within the inlet manifold system on 964 and 993 models. It plays a critical role in maintaining vacuum pressure for braking assistance and ensuring proper airflow within the intake system.

Fits:

• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 993 (911) C2 1994-97
• Porsche 993 (911) C4 1994-97
• Porsche 993 (911) RS 1994-97
• Porsche 993 (911) C2S 1994-97
• Porsche 993 (911) C4S 1994-97
• Porsche 993 (911) TURBO 1994-96
• Porsche 993 (911) GT2 1994-97
• Porsche 993 (911) TURBO S 1994-97
• Porsche 924 2.0L 1976-79
• Porsche 924 2.0L 1980-85
• Porsche 924 Turbo 2.0L 1979-81
• Porsche 924 Turbo 2.0L 1982-84
• Porsche 924 Carrera GT 2.0L 1981
• Porsche 924 Carrera GTS 2.0L 1982
• Porsche 928 4.5L 1978-82
• Porsche 928S 4.7L 1981-83
• Porsche 928S2 4.7L 1984-86

Supplied per metre, this hose allows precise length replacement and flexible routing, making it ideal for maintenance, repair, or restoration of Porsche vacuum and intake systems. Manufactured to OEM specifications for durability and reliable performance.

Key Features

• Multi-purpose air hose for vacuum and intake systems
• Suitable for Porsche 911, 924, 928, 964, and 993
• Part number 9991810225B
• Used for brake servo and inlet manifold applications
• Sold per metre for custom lengths
• Resistant to heat and vacuum pressure
• Flexible and durable construction
• OEM-style fit and performance

Function and Purpose

This hose serves critical roles across multiple systems.

It helps to:
• Deliver vacuum pressure to the brake servo (booster)
• Maintain effective braking assistance
• Support airflow within the inlet manifold system
• Ensure stable engine operation and efficiency
• Prevent vacuum leaks that affect performance

Why Replace Air / Vacuum Hoses

Over time, hoses degrade due to heat and pressure cycles.

Common issues include:
• Cracking or splitting
• Vacuum leaks reducing brake efficiency
• Hardening and reduced flexibility
• Poor engine performance due to air leaks

Replacing worn hoses restores braking performance and engine efficiency.

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

9991810225B

The product you are viewing cross references to these numbers