FAG SS3378 Wheel Seal - Rear Inner

FAG SS3378 Wheel Seal Overview

FAG SS3378 is a wheel seal built for wheel-end service where contamination control and grease retention matter. It is engineered to OE-level dimensional requirements for applications that demand a precise seal at the hub.

For drivers and technicians searching for a wheel seal for Honda Civic, Toyota Corolla, or similar wheel-end service applications, SS3378 provides a direct-fit sealing solution based on the listed dimensions and seal construction.

Key Features

• Part number: FAG SS3378
• Seal type: metal, spring, auxiliary lip, inner shell
• Sealing material: nitrile
• Bore diameter: 120.675 mm / 4.751 in
• Seal outside diameter: 120.802 mm / 4.756 in
• Seal width: 10.922 mm / 3.5 in
• Built to help keep dirt, dust, and moisture out of the wheel end
• Helps retain grease at the bearing interface over service life

Detailed Description

FAG SS3378 is a wheel seal designed around precise hub and bearing sealing requirements. The nitrile sealing material, metal shell, spring, auxiliary lip, and inner shell construction work together to maintain contact at the wheel end while supporting grease retention and contamination control. The listed bore diameter, outside diameter, and width are important for applications where seal dimensions must match the hub assembly exactly.

This wheel seal is a practical choice when servicing wheel-end components on vehicles such as Honda Civic and Toyota Corolla applications that require a seal with the same dimensional profile. If you are replacing a worn seal during bearing service, FAG SS3378 helps restore the sealing interface needed for clean, stable wheel-end operation. This part cross-references Monroe Shocks & Struts (e.g., 4133378100) for the same application.

What It Helps Address

• Grease loss at the wheel bearing seal area
• Dirt and dust intrusion into the hub assembly
• Moisture entering the wheel end
• Seal wear from age, heat, and road exposure
• Noise or roughness caused by contaminated bearing service

Installation Notes and Tips

Verify bore diameter, outside diameter, and seal width before installation. Clean the hub and bearing surfaces thoroughly, and inspect the sealing surface for grooves, corrosion, or damage that could affect seal performance. Press the seal in evenly to avoid distorting the metal shell or sealing lip. Confirm the application by part number and dimensions when servicing Honda Civic, Toyota Corolla, or other wheel-end assemblies that call for this size.

Quality Assurance

FAG designs wheel seals to meet vehicle manufacturer specifications and works with suppliers to maintain its quality standards. SS3378 is built for demanding wheel-end sealing requirements where fit, material selection, and contamination control are critical.