Genuine 99970736441 Engine Crankcase Breather O-Ring

Engine Crankcase Breather O-Ring for Porsche 911

This Genuine engine crankcase breather O-ring seals the breather hose connector at the engine on select 2004-2005 Porsche 911 models. It is a direct-fit sealing component for maintaining a secure connection in the crankcase ventilation system.

Key Features

• Genuine part number 99970736441
• Engine crankcase breather O-ring for the breather hose connector
• Fits 2004-2005 Porsche 911, at breather hose connector on engine
• OE-style sealing component for emission control and crankcase ventilation service
• Compatible With Porsche 911 breather hose connector repairs requiring part number 99970736441

Detailed Description

Part number 99970736441 is a Genuine sealing ring used at the breather hose connector on the engine. On Porsche 911 applications, this O-ring helps maintain a tight seal where the crankcase breather hose connects, supporting proper crankcase ventilation and reducing the chance of leakage at the connector. This part is listed for 2004-2005 Porsche 911 models and is a focused replacement for the specified engine location.

What It Helps Address

• Oil seepage at the breather hose connector
• Air leaks at the crankcase breather connection
• Loose or worn sealing surfaces during breather service
• Crankcase ventilation connection issues on Porsche 911 engines

Installation Notes and Tips

Install at the breather hose connector on the engine as specified for 2004-2005 Porsche 911 applications. Inspect the connector and sealing surfaces before installation, and replace the O-ring if it shows flattening, cracking, or hardening. Confirm the part number 99970736441 matches the service location before assembly.

Quality Assurance

Genuine OEM replacement part for the listed Porsche 911 fitment. This part cross-references Porsche OE service references for the same application.