German Cylinder Base O-Ring for Porsche 911/993 (2001–2011)

This replacement German Cylinder Base O-Ring fits Porsche 911/993 (2001–2011) applications listed in the fitment table below. It seals the service connection so fluid, air, or vacuum stays contained where the joint is assembled.

Use it when old rubber, paper, or sealing surfaces have hardened, flattened, or begun to leak.

Technical Details

• Manufacturer part number: 99970739440
• Type: Cylinder Base O-Ring
• Application range: Porsche 911/993 (2001–2011)

Fitment & Compatibility

Use the fitment table below to confirm year, model, submodel, and application notes before ordering.

If you want help confirming the application, send us your VIN. PMB Performance has spent over 20 years working through Porsche fitment details, model changes, and service parts.