Genuine Porsche 996 303 517 00 Transmission Output Shaft Seal Gaskets & Seals - 996 303 517 00

The Genuine Porsche 996 303 517 00 is an OEM transmission output shaft seal designed to maintain a fluid-tight barrier at the transmission output on Porsche vehicles. Sourced directly from Porsche AG, this seal ensures exact fit, factory-specified material quality, and long-term sealing performance that aftermarket alternatives may not replicate.

Over time, transmission seals can harden, crack, or shrink due to heat cycling and normal wear, leading to fluid leaks that can compromise drivetrain lubrication and performance. Replacing a worn seal with this Genuine Porsche part restores the factory seal integrity and helps prevent costly transmission damage.

Key Features:

• 100% Genuine Porsche OEM part — not aftermarket or remanufactured
• Engineered to factory specifications for precise fit and long service life
• High-quality elastomer construction resistant to transmission fluid, heat, and wear
• Direct replacement — no modifications required for installation
• Helps prevent transmission fluid leaks at the output shaft
• Backed by Porsche's OEM quality standards

For optimal drivetrain reliability, always replace transmission seals in pairs where applicable and inspect adjacent components such as the output shaft and bearing surfaces during installation. This is a Genuine Porsche replacement part, ensuring your vehicle maintains its original engineering standards.