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National 4990 Wheel Seal - Front Inner
National 4990 Wheel Seal for Front Inner Applications
National 4990 is a metric wheel seal built for front inner service on select Ford, Mercury, Mazda, and Kia applications. It uses nitrile sealing material and a Redi-Coat finish to support consistent sealing performance in driveline and axle service.
Key Features
- Wheel seal / oil seal design for driveline and axle sealing
- Metric dimensions: 52.000 mm shaft ID and 68.280 mm outside diameter
- Housing bore: 68.000 mm
- Nitrile material for sealing durability
- Redi-Coat finish
- Series 4000, Type 281
- Overall width with side lip: 13.200 mm
Product Details
National 4990 is engineered as a front inner wheel seal with precise metric sizing for proper fit in the housing bore and on the shaft. The seal measures 52.000 mm inside diameter, 68.280 mm outside diameter, and 13.200 mm overall width with side lip, making it a direct-match service part for applications that require accurate axle sealing. National has focused on sealing solutions for more than 75 years, and this part reflects that experience in a practical replacement design. This part cross-references Beck/Arnley 052-3196 and Centric Parts 417.45002 for the same application. National 4990 is a strong fit for front inner service on Kia Rio, Ford Aspire, Mercury Capri, Ford Festiva, Mazda 323, and Mercury Tracer applications listed below.
Vehicle Fitment
- Fits 2001-2005 Kia Rio, Front Inner
- Fits 1994-1997 Ford Aspire, Front Inner
- Fits 1991-1994 Mercury Capri, Front Inner
- Fits 1988-1993 Ford Festiva, Front Inner
- Fits 1986-1989 Mazda 323, Front Inner
- Fits 1987-1989 Mercury Tracer, Front Inner
Common Issues This Seal Addresses
- Gear oil seepage at the wheel end of the axle
- Contamination entering the hub or bearing area
- Seal wear from age, heat, or mileage
- Loss of sealing integrity during axle service
- Noise or damage related to lubricant leakage
Installation Notes and Tips
Verify shaft diameter, housing bore, and seal width before installation to confirm the correct metric match. Inspect the sealing surface for grooves, corrosion, or debris, and clean the bore thoroughly before pressing the seal into place. Use care to keep the sealing lip aligned during installation so the nitrile lip seats evenly on the shaft.
Quality Assurance
National is a long-established sealing brand with a focus on premium sealing solutions and ongoing design updates for modern vehicle service. The 4990 wheel seal is built to the listed dimensions and material specifications for dependable replacement use.
| Brand | National |
|---|---|
| Part Number | 4990 |
| Housing Bore (Inch) | 2.677 |
| Housing Bore (MM) | 68.000 |
| Inside Diameter | 2.047 |
| Inside Diameter | 52.000 |
| Material | Nitrile |
| Outside Diameter | 2.688 |
| Outside Diameter | 68.280 |
| Outside Diameter (Inch) | 2.688 |
| Outside Diameter (mm) | 68.280 |
| Overall Width with Side Lip (MM) | 13.200 |
| Overall Width with Side Lip (Inch) | 0.520 |
| Part Description | Oil Seal |
| Redicoat | Yes |
| Series | 4000 |
| Shaft (Inch) | 2.047 |
| Shaft (MM) | 52.000 |
| Type | 281 |
| Unit of Dimension | Metric |
| Width (Inch) | 0.276 |
| Width (mm) | 7.000 |
This part fits 26 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2005 | Kia | Rio | Front Inner | |
| 2004 | Kia | Rio | Front Inner | |
| 2003 | Kia | Rio | Front Inner | |
| 2002 | Kia | Rio | Front Inner | |
| 2001 | Kia | Rio | Front Inner | |
| 1997 | Ford | Aspire | Front Inner | |
| 1996 | Ford | Aspire | Front Inner | |
| 1995 | Ford | Aspire | Front Inner | |
| 1994 | Ford | Aspire | Front Inner | |
| 1994 | Mercury | Capri | Front Inner | |
| 1993 | Ford | Festiva | Front Inner | |
| 1993 | Mercury | Capri | Front Inner | |
| 1992 | Ford | Festiva | Front Inner | |
| 1992 | Mercury | Capri | Front Inner | |
| 1991 | Ford | Festiva | Front Inner | |
| 1991 | Mercury | Capri | Front Inner | |
| 1990 | Ford | Festiva | Front Inner | |
| 1989 | Ford | Festiva | Front Inner | |
| 1989 | Mazda | 323 | Front Inner | |
| 1989 | Mercury | Tracer | Front Inner | |
| 1988 | Ford | Festiva | Front Inner | |
| 1988 | Mazda | 323 | Front Inner | |
| 1988 | Mercury | Tracer | Front Inner | |
| 1987 | Mazda | 323 | Front Inner | |
| 1987 | Mercury | Tracer | Front Inner | |
| 1986 | Mazda | 323 | Front Inner |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.