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- 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 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 Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Vacuum Hose - 3.5 x 2mm
High-quality vacuum hose with 3.5 x 2mm dimensions, designed for Porsche 964, 996, 986 Boxster, and 987.1 Boxster & Cayman models.
This hose is used across various engine systems to maintain
proper vacuum pressure, supporting the operation of intake, fuel, and
emissions-related components. It is essential for ensuring smooth engine
performance and correct system functionality.
Fits:
- 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 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 Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
Diagram ref no 21
Supplied in 1 metre lengths, this hose allows precise
replacement and routing, making it ideal for maintenance, repair, or
restoration of Porsche vacuum systems. Manufactured to OEM standards for
durability and reliability.
Key Features
• 3.5mm internal diameter, 2mm wall thickness
• Suitable for Porsche 964, 996, 986, and 987.1 models
• Part number 00004320499
• Designed for vacuum system applications
• Supplied in 1 metre lengths
• Flexible and durable construction
• Resistant to heat and engine bay conditions
• OEM-style fit and performance
Function and Purpose
This vacuum hose is a critical part of engine system operation.
It helps to:
• Maintain vacuum pressure across engine systems
• Support intake and fuel system functions
• Enable proper operation of valves and regulators
• Ensure balanced airflow and engine efficiency
• Support emissions control systems
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
00004320499
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne Turbo 4.5L 2003-06
Fits:
Porsche 957 Cayenne 3.6L 2008-10
Porsche 958 Cayenne 3.6L 2011-18
Click 'Zoom in' for large parts diagram.
Diagram ref no 7.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95510724700
The product you are viewing cross references to these numbers
- Porsche 955 Cayenne S 4.5L V8 2003-06
This OE Match breather hose is a replacement crankcase ventilation hose used on Porsche 955 Cayenne S models. It connects the crankcase breather system to the intake manifold, helping route crankcase vapours back into the engine intake system.
Fits:
Porsche 955 Cayenne S 4.5L 2003 - 2006
Diagram ref no 5
The breather hose forms part of the engine crankcase ventilation system. It allows oil vapour and blow-by gases from the crankcase to be drawn into the intake manifold, where they can be burned through the combustion process. This helps reduce pressure inside the crankcase and supports cleaner, more efficient engine operation.
This hose fits in the engine bay, connecting the crankcase ventilation system to the intake manifold. It is part of the breather / PCV system and is positioned around the upper engine intake area, depending on engine layout.
Functions
• Connects the crankcase breather system to the intake manifold
• Helps route crankcase vapours back into the engine intake
• Supports correct crankcase pressure regulation
• Helps reduce oil vapour build-up inside the engine
• Assists emissions control by recirculating blow-by gases
• Helps maintain stable idle and smooth engine running
• OE Match replacement for cracked, brittle, or leaking original hoses
Why Replace This Part?
Breather hoses are exposed to heat, oil vapour, vacuum pressure, and age-related hardening. Over time, the hose can crack, split, collapse, soften, or leak, which may cause vacuum leaks, rough idle, poor running, oil mist around the engine, or crankcase ventilation faults. Replacing a worn breather hose helps restore correct ventilation and prevents unmetered air from entering the intake system.
When to replace:
• The hose is cracked, brittle, split, collapsed, or oil-soaked
• There is a vacuum leak or hissing noise near the intake manifold
• The engine has rough idle, hesitation, or poor running
• Oil vapour, residue, or mist is visible around the breather connection
• Crankcase ventilation or emissions-related faults are present
• The intake manifold or breather system is being serviced
• As preventative maintenance on ageing original breather pipework
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94810721702
The product you are viewing cross references to these numbers