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Porsche Cayman 718C (982C) 2017>> Cayman S 718 2.5L Manual (350 Bhp) Engine Rebuild Parts Oil System Parts Oil Separators & Vent lines

Engine Crankcase Breather Kit. Porsche 957 Cayenne S / GTS 4.8L 2009-2010  ›  94810723603

Engine Crankcase Breather Kit. Porsche 957 Cayenne S / GTS 4.8L 2009-2010 - 94810723502, 94810723603, 94810524504, 94810724702, 94810724502
4
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94810723603/1KIT
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Product Information
Engine Crankcase Breather Hose Kit
OE Match engine crankcase breather hose kit for Porsche 957 Cayenne S and GTS 4.8L models from 2009 to 2010. This replacement hose kit forms part of the positive crankcase ventilation (PCV) system, helping route crankcase gases correctly to the air/oil separator and intake system.

Fits:
Porsche 957 Cayenne S / GTS 4.8L 2009 - 2010

Diagram ref no 13, 14, 1, 10 & 19

Why the Engine Crankcase Breather Hose Matters
During combustion, engines naturally produce positive crankcase pressure. This pressure combines with heat and oil vapers inside the crankcase. The breather hose is designed to handle this flow and keep your PCV system working efficiently.

Over time, however, exposure to heat, oil, and pressure makes the breather hose a common failure point. When damaged, it can cause poor performance, check engine lights, and increased emissions.

Common Symptoms of a Failing Crankcase Breather Hose

  • Cracks, leaks, or breaks – Heat and oil vapers degrade rubber or plastic over time, leading to air leaks.
  • Broken connectors or clips – Brittle plastic can snap during service or due to age.
  • Visible damage – Hoses may split, soften, or harden, creating noticeable holes.
  • Check Engine Light (CEL) – Unmetered air from a leak often triggers intake-related fault codes.
  • Engine misfires or rough idle – Severe air leaks upset the air/fuel mixture, causing misfires.

Oil residue or odour – Escaping vapers leave oily deposits on the hose, engine block, and nearby components. In severe cases, you may smell burning oil.

Why You Shouldn’t Ignore a Bad Breather Hose

A faulty crankcase breather hose affects engine performance, fuel efficiency, and emissions compliance. Left untreated, it can cause long-term engine damage and costly repairs.

If you notice any of the above signs, it’s important to inspect and replace your crankcase breather hose as part of regular PCV system maintenance.


NOTE: This part is compatible only with 957 Cayenne S/GTS models produced from the 2009 model year onwards. It is not compatible with earlier models equipped with the silver AOS.



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94810723603
94810723502
94810723603
94810524504
94810724702
94810724502

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Diagram ref no 14

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Oil Separator For Oil Sump.

The oil separator for the oil sump is an essential component of the engine crankcase ventilation and oil management system, designed to separate oil from blow-by gases before they are recirculated through the engine. This helps prevent excess oil from entering the intake system while ensuring efficient oil return to the sump.

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Diagram Ref No 11

What This Product Does:

  • Separates oil from crankcase gases (blow-by gases)
  • Returns separated oil back to the sump
  • Prevents oil from entering the intake system
  • Supports proper crankcase pressure regulation

Symptoms Of Wear Or Failure:
  • Excessive oil consumption
  • Oil residue in the intake system or air filter housing
  • Blue smoke from the exhaust (burning oil)
  • Engine misfires or rough running
  • Check engine light or crankcase ventilation fault codes

Why Replacement Matters:
  • Reduces oil consumption and prevents oil contamination in intake
  • Maintains proper crankcase ventilation and pressure balance
  • Improves engine performance and efficiency
  • Prevents carbon buildup in intake components
  • Helps avoid costly engine damage caused by oil ingestion



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9A210130700
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Oil Separator.

This Oil Separator is a OE MATCH Porsche 982 Boxster / Cayman engine component designed to regulate crankcase ventilation by separating oil vapour from blow-by gases before they are recirculated into the intake system. This ensures that only clean air is reintroduced into the engine, maintaining efficiency and reducing oil consumption.

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Diagram Ref No 14

What This Product Does:
  • Separates oil vapour from crankcase gases
  • Prevents oil from entering the intake system
  • Maintains proper crankcase ventilation
  • Reduces oil consumption and emissions
  • Supports efficient engine performance

Symptoms Of Wear Or Failure:
  • Excessive oil consumption Blue smoke from the exhaust (burning oil)
  • Rough idle or engine misfires
  • Whistling or suction noises from the engine
  • Oil residue in intake components
  • Check engine light or fault codes related to crankcase ventilation  

Why Replacement Matters:
  • Prevents oil contamination of the intake system
  • Restores proper engine ventilation and balance
  • Reduces emissions and improves efficiency
  • Avoids damage to sensors, intake valves, and turbo components (if applicable)
  • Maintains smooth engine performance and long-term reliability  



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0PC115099B
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