FAG SS4961 Engine Crankshaft Seal - Rear

Engine Crankshaft Seal for Nissan and Infiniti

FAG SS4961 is an engine crankshaft seal built for rear engine sealing on a wide range of Nissan and Infiniti applications. It uses Viton sealing material with a rubber body, spring, and auxiliary lip to help maintain a tight seal at the crankshaft and keep contaminants out of the engine.

Compatible With rear applications on Nissan 370Z, GT-R, Altima, Frontier, Armada, TITAN, Xterra, Pathfinder, Rogue, Sentra, and select Infiniti Q50, Q70, G37, M37, FX35, and QX56 models. FAG SS4961 is also referenced by part number 4134961100.

Key Features

• Rear engine crankshaft seal for select Nissan and Infiniti vehicles
• Viton sealing material for durability in demanding engine environments
• Rubber, spring, and auxiliary lip design for controlled sealing pressure
• Seal outside diameter: 104.191 mm / 4.102 in
• Bore diameter: 103.988 mm / 4.094 in
• Seal width: 8.382 mm / 3.307 in
• Cross-reference part numbers: National 228411 and Wix 33007

Detailed Description

FAG SS4961 is engineered as a rear engine crankshaft seal for vehicles that require precise sealing at the crankshaft opening. The Viton sealing material is selected for its ability to handle engine heat and fluid exposure, while the spring-loaded, auxiliary-lip construction helps maintain contact pressure and reduce leakage paths. With a 104.191 mm outside diameter and 103.988 mm bore diameter, this seal is sized for specific OE-style applications across Nissan and Infiniti platforms.

This part is used on many rear-seal applications, including 2009-2019 Nissan GT-R, 2009-2019 Nissan 370Z, 2002-2016 Nissan Altima, and 2014-2019 Infiniti Q70. It also appears on additional rear-fitment vehicles such as Nissan Frontier, Pathfinder, Xterra, Armada, TITAN, Sentra, Rogue, and select Infiniti Q50, Q60, QX50, QX60, QX70, G35, G37, M35, M37, M45, FX35, FX45, and QX56 models.

What It Helps Solve

• Rear crankshaft oil leakage
• Oil seepage around the engine seal area
• Contamination entering the crankshaft sealing surface
• Loss of sealing integrity from worn or hardened original seals
• Service issues on Nissan and Infiniti rear engine seal repairs

Installation Notes and Tips

Verify the vehicle’s engine code, model year, and rear seal application before ordering. Compare the old seal’s dimensions and profile to the listed specifications, especially the width and outside diameter. Clean the sealing surface thoroughly and inspect the crankshaft and housing for wear, scoring, or contamination before installation. Proper alignment during installation is important to avoid damaging the Viton lip or spring.

Quality Assurance

FAG designs seals to meet vehicle manufacturer specifications and works with suppliers to maintain its quality standards. This part is built for the demanding sealing requirements found in rear crankshaft applications on Nissan and Infiniti vehicles.