National 473823 Wheel Seal - Front, Rear or Rear Inner

National 473823 Wheel Seal Overview

National 473823 is a metric wheel seal built with nitrile sealing material and Redi-Coat protection for dependable sealing performance in driveline and axle applications. With a 35.000 mm shaft size, 55.180 mm outside diameter, and 8.000 mm width, it is specified for a range of BMW rear differential applications and select import transmission and axle positions.

This part cross-references Bosch 13954 and Centric Parts 417.91008 for the same application.

Key Features

• Part number: 473823
• National 470000 series wheel seal
• Nitrile sealing material for oil sealing applications
• Metric dimensions for accurate housing and shaft fit
• Inside diameter: 35.000 mm (1.378 in)
• Outside diameter: 55.180 mm (2.172 in)
• Width: 8.000 mm (0.315 in)
• Redi-Coat surface treatment

Detailed Description

National 473823 is an oil seal engineered for driveline and axle sealing where precise dimensions matter. The nitrile sealing material is selected for oil resistance, while the metric sizing helps support proper fit in the housing bore and on the shaft. This seal is listed across rear differential applications on BMW 323i, 328i, 335i, 528i, X3, X5, X6, Z4, 525i, 530i, 325Ci, 330i, and related models, along with select Suzuki, Chevrolet, Kia, Nissan, Mazda, Ford, and Geo applications. For BMW rear differential service, National 473823 is a direct-fit reference for vehicles using the specified 7.4016-inch ring gear and BMW 188K or 188N differential configurations.

National has supplied sealing solutions for more than 75 years, and this part reflects that focus on dimensional accuracy and application coverage. If you are servicing a BMW 328i rear differential, a BMW X5 rear axle seal, or a Suzuki Grand Vitara transmission application, verify the listed position and notes before installation. National 473823 also appears in interchange listings for multiple aftermarket and OE-reference part numbers, making it a practical replacement choice for catalog-based repair work.

Common Problems This Seal Addresses

• Gear oil seepage at the differential or axle seal area
• Contamination entering the sealed driveline assembly
• Fluid loss from worn or hardened original seals
• Noise or wear caused by inadequate sealing at the shaft interface
• Service replacement for BMW rear differential seal maintenance

Installation Notes and Tips

• Confirm the application by year, make, model, position, and differential or transmission note before ordering.
• Inspect the shaft and housing bore for scoring, corrosion, or wear before installing the new seal.
• Clean the sealing surface thoroughly so the nitrile lip can seat evenly.
• Match the seal orientation to the original part and the service manual procedure.
• Use the exact metric dimensions to verify fit on BMW rear differential and other listed applications.

Quality Assurance

National is a long-established sealing brand with a reputation built over decades of drivetrain and axle sealing development. Part number 473823 is produced as a metric oil seal with Redi-Coat treatment and application-specific sizing for consistent replacement service.