National 1108 Engine Intermediate Shaft Seal - Front

Engine Intermediate Shaft Seal for Audi and Volkswagen

National 1108 is an engine intermediate shaft seal built for metric applications that require a precise oil seal fit. It uses a fluoro-elastomer sealing material and a clockwise-spiral lip design to help maintain sealing performance in front-mounted applications across a wide range of Audi, Volkswagen, Isuzu, Suzuki, and Volvo vehicles.

Key Features

• Part number 1108 engine intermediate shaft seal
• Fluoro-elastomer sealing material for oil-seal service
• Clockwise-spiral lip design
• Metric dimensions: 35.000 mm shaft, 48.000 mm housing bore, 7.000 mm width
• Outside diameter: 48.400 mm; inside diameter: 35.000 mm
• National 1000 Series, Type 32
• Cross-references Bosch 13942 for the same application

Detailed Description

National 1108 is an oil seal engineered for the intermediate shaft area where stable sealing and accurate sizing matter. The fluoro-elastomer construction is selected for sealing service in engine environments, while the spiral lip profile supports consistent contact at the shaft surface. This part number 1108 is a direct-fit style solution for many front-position applications, including Audi A4, Audi A6 Quattro, Volkswagen Jetta, Volkswagen Golf, and Volkswagen Passat models listed in the fitment data.

With a 35.000 mm shaft diameter and 48.000 mm housing bore, this seal is specified in metric dimensions for accurate replacement work. National has supplied sealing products for decades, and this intermediate shaft seal reflects that focus on dimensional consistency and application coverage.

What It Is Used For

• Oil leakage at the intermediate shaft seal area
• Visible seepage around the front engine sealing surface
• Seal wear from age, heat, and mileage
• Replacement during front-engine service on Audi and Volkswagen platforms
• Restoring proper sealing on vehicles such as Audi A6 Quattro, Volkswagen Golf, and Volkswagen Jetta

Installation Notes and Tips

Verify the shaft diameter, housing bore, and seal width before installation. Clean the sealing surface thoroughly and inspect the shaft for grooves or damage that could affect the new seal. Confirm the vehicle position listed in the fitment data, since this part is used in front applications on many models. For best results, install the seal squarely to avoid lip distortion and premature leakage.

Quality Assurance

National is known for sealing products backed by long-term industry experience, and this part is part of the 1000 Series sealing line. The manufacturer description emphasizes premium sealing solutions and ongoing design development for modern vehicle service.