Oil tank breather hose. Porsche 964  ❭  96420714501

Oil tank breather hose.
As the upper of the two breather hoses leading from the top of the oil tank to the connecting piece, it plays a key role in maintaining correct hydrocarbon emission control and stable engine performance.

Fits:
Porsche 964 1989 - 1994

Diagram ref no 37

Designed to match the original hose in shape, length, and material, this replacement ensures a secure, leak-free connection and reliable vapor flow. Over time, factory hoses become brittle, soft, or oil-soaked, leading to vapor leaks, oil mist in the engine bay, or improper crankcase ventilation. Installing an fresh breather hose restores the integrity of the dry-sump ventilation circuit and helps maintain stable engine operation.

A degraded breather hose can lead to:
• Oil mist or residue in the engine bay
•  Rough or unstable idle due to pressure imbalance
•  Oil leaks caused by crankcase over-pressure
•  Increased emissions and unpleasant odours
Replacing the breather hose keeps the dry-sump system operating properly and ensures a clean, leak-free engine compartment.



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