Fix Porsche Cayenne 4.8L PCV Issues Without Replacing the Oil Separator!
Restore proper engine vacuum, eliminate leaks, and reduce oil consumption without replacing the entire oil separator. This 85mm PCV diaphragm is designed to replace the failed membrane in Porsche M48.51 engines.
Over time, the original diaphragm loses elasticity due to heat and oil exposure, leading to cracks or collapse. This causes vacuum leaks, unstable engine operation, and increased wear. Replacing the membrane restores correct crankcase ventilation and engine performance.
Important Note! Please verify your engine type and part number before purchase to ensure compatibility.
Common Failure Symptoms:
• High-pitched whistling noise near oil separator
• Rough or unstable idle
• Engine misfires and poor response
• Increased oil consumption and exhaust smoke
• Vacuum leaks affecting engine performance
Why This Repair Kit Works:
• Restores proper crankcase pressure and vacuum
• Eliminates air leaks and engine noise
• Helps stabilize idle and engine operation
• Reduces oil consumption
• Cost-effective alternative to full oil separator replacement
Technical Specifications:
• Diameter: 85mm
• Designed for Porsche 4.8L M48.51 engine
• 1:1 replacement matching OEM dimensions
• Durable, oil-resistant elastomer material
Perfect Fitment:
• Direct replacement diaphragm
• Fits oil separator part numbers: 94810723653;94810723652
Compatibility:
Porsche Cayenne 4.8L (S; GTS; Turbo)
Engine: M48.51
Important Installation Note: This part does not fit M48.01 engines. If your oil separator has only one outlet, it is M48.01. This diaphragm is designed for M48.51 versions with two outlets.
After installation, allow the engine to idle for a few minutes, then restart it to let the ECU adapt to the restored vacuum pressure.
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Orders ship within 1–2 business days.
Standard delivery:
- USA: Some items ship from our US warehouse and arrive within 3 business days.
- USA-EU: 10–21 business days
- Worldwide: 14–30 business days
Shipping cost is shown at checkout.
Can I exchange or return an item?
Yes, you can exchange or return an item within 14 days of purchase. This right is guaranteed to you by the Law on the Protection of Consumer Rights
To use this feature, please make sure that:
- the product was not in use and has no traces of use: scratches, chips, abrasions, etc.
- the goods are fully completed and the integrity of the packaging is not violated
- retained all labels and factory markings