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Porsche // Cayenne 9PA1 (957) 2007-2010 // Any
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- 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 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
Fits:
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 997 CARRERA 2005-08
Diagram ref no 18
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99610622652PRM
The product you are viewing cross references to these numbers
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
Fits:
Porsche 957 Cayenne S / GTS >>2008
Click 'Zoom in' for large parts diagram.
Diagram ref no 13 (Cyl. 1-4) or 14 (Cyl 5-8).
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94810723
The product you are viewing cross references to these numbers
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
OE Match connecting vent line for the air/oil separators. This breather component forms part of the engine’s crankcase ventilation system.
Fits:
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
Diagram Ref No 19
Check fitment for your specific vehicle (model, year, engine) before ordering.
What This Product Does
The line provides the connection linking the air/oil separators, allowing ventilation gases to pass through this part of the breather assembly. It is a connecting pipe, rather than an oil separator or non-return valve.
Functions
- Connects the air/oil separator assemblies.
- Provides a passage for crankcase ventilation gases.
- Supports the intended routing of the engine breather system.
Technical Details
- Brand: OE Match.
- Internal diagram description: breather line.
- Diagram engine/model identifier: 4851.
Symptoms of Fault
Inspection is appropriate if the line becomes brittle, develops cracks or shows oily deposits around its connections. Rough idling, unusual breather noises or increased oil use can also accompany ventilation faults, but do not establish that this line is the cause.
Why Replacement Matters
Renewing a damaged connecting line helps restore a sealed ventilation path. Check the neighbouring breather pipes, connections and separator assemblies during diagnosis rather than assuming every ventilation symptom requires this component.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94810724553
The product you are viewing cross references to these numbers
- Porsche 957 Cayenne S / GTS 4.8L 2007-10
Vent Line – Oil Separator to Crankcase
Fits:- Porsche 957 Cayenne S / GTS 4.8L 2007-10
Diagram ref no 1
This vent line forms part of the engine's crankcase
ventilation system, connecting the oil separator with the crankcase ventilation
circuit. It helps route blow-by gases and oil vapour correctly through the
breather system while supporting controlled crankcase pressure.
What Does the Vent Line Do?
During normal engine operation, combustion gases can pass
the piston rings and enter the crankcase. The crankcase ventilation system
manages these gases and routes oil-laden vapours through the air/oil separator
system.
This vent line provides part of that connection, allowing
vapours to move through the system while helping maintain the correct crankcase
pressure.
Why Does It Fail?
Breather and vent lines operate in a hot engine environment and are continually exposed to oil vapour.
Over time they can:
- Harden or become brittle
- Crack or split
- Develop leaks at their connections
- Become contaminated with oil residue
- Suffer damage during engine maintenance
Age-related deterioration is particularly relevant on older Cayenne models.
When Should It Be Replaced?
Inspect the vent line if there are signs of:
Visible cracking or splitting Oil residue around connections Vacuum or pressure leaks Hissing noises Rough or unstable idle PCV-related engine faults Deteriorated connector endsA damaged vent line can interfere with the operation of the crankcase ventilation system, so the associated air/oil separators and other breather hoses should also be inspected.
Checks Before Installation
When replacing the vent line, inspect:
- Air/oil separators
- Adjacent breather hoses
- Hose connections and seals
- Crankcase ventilation valves
- Intake connections
- Evidence of oil leakage
- Brittle or damaged plastic fittings
Replacing other deteriorated breather components at the same time can help avoid repeated dismantling.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94810724702
The product you are viewing cross references to these numbers
- Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
Fits:
Porsche 957 Cayenne Turbo / Turbo S 2007-10
Click 'Zoom in' for large parts diagram.
Diagram ref no 1.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94810722951
The product you are viewing cross references to these numbers