Crankcase breather hose, Oil separator connection. Porsche 996 / 997.1 › 99610714530

OE Match crankcase breather hose for selected Porsche 996 and 997.1 models, linking the oil separator with the crankcase. This is the connecting vent line, not the oil separator assembly.

Fits:

• 997 MK1 Carrera 2 3.6L 2005–08
• 997 MK1 Carrera 2S 3.8L 2005–08
• 997 MK1 Carrera 4 3.6L 2005–08
• 997 MK1 Carrera 4S 3.8L 2005–08
• 996 C4 3.4L 1997–08/01
• 996 C2 3.6L 09/01–2005
• 996 C4 3.6L 09/01–2005
• 996 C4S 3.6L 09/01–2005

Diagram Ref No 5

What This Product Does
The hose provides a connection within the crankcase ventilation circuit. An intact line allows the ventilation system to operate without leakage at this connection; oil separation itself takes place in the separator rather than in the hose.

Functions

• Connects the crankcase and oil separator.
• Provides a passage within the engine breather circuit.
• Maintains a sealed connection when correctly installed.

Technical Details

• Part reference: 99610714530.
• Component identification in the supplied diagrams: vent line.
• 996 assembly context: Carrera 2/4/4S, M96.01/02/03/04, 1998–05.
• 996 part-row identification: M339 and M96.03; catalogue note: -01 02-.
• 997.1 assembly context: M96.05 3.6L, COUPE / CABRIO, 2005–08.

Symptoms of Fault
Inspect the breather line for cracks, brittle sections, damaged connections or oily deposits. Unsteady idling, whistling, smoke or increased oil use can accompany ventilation-system faults, but none of these symptoms confirms that this hose is responsible.

Why Replacement Matters
Renewing a damaged line addresses leakage at the affected connection. Check the adjoining fittings, seals and separator during the repair: replacing the hose alone will not resolve a separate separator fault or damage elsewhere in the circuit.

FAQs

Does exhaust smoke prove the hose needs replacing?
No. Smoke has several possible causes; inspect the ventilation system and verify the oil level before selecting replacement parts.

What should be checked alongside it?
Examine neighbouring breather lines, connection points and seals, and assess the separator if symptoms suggest a wider ventilation fault.

How should compatibility be confirmed?
Compare reference 99610714530 with the original component and check the precise model, engine and production details.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99610714530

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