OIL SEAL Description
21421-2G100 OIL SEAL: Hyundai-Kia Theta II Guide
Front Crankshaft Main Seal | Sonata, Santa Fe, Optima & Sorento
The 21421-2G100 OIL SEAL is the essential engine component designed to restore the lubricant integrity of your Hyundai or Kia 2.0L / 2.4L Theta II engine. This professionally engineered seal ensures maximum protection against oil leaks at the crankshaft front, consistent internal pressure, and superior structural integrity under the extreme thermal cycles of modern high-output engines. This component is critical for maintaining the professional performance of your vehicle’s original engine configuration.
21421-2G100 OIL SEAL Fitment
- Hyundai Sonata (YF/LF): 2009–2019
- Hyundai Santa Fe (DM): 2.4L Theta II
- Kia Optima (TF/JF): 2.0L / 2.4L GDI
- Kia Sorento (XM/UM): 2.4L GDI
- OE Part Number: 21421-2G100
Technical Engine Specs
- Engine Family: Theta II / Theta II GDI
- Position: Front Crankshaft
- Material: Specialized Fluorine Rubber (FKM)
- Type: High-Pressure Radial Shaft Seal
- Standard: OE Precision Engineering
Benefits of 21421-2G100 OIL SEAL
Choosing this specific sealing unit is vital for protecting your vehicle’s drive system. Because Theta II engines utilize high internal pressures, selecting a premium seal ensures that no oil bypasses the front timing cover, preventing belt slip and protecting engine sensors from oil contamination. Proper lubrication is key; therefore, we strongly recommend browsing our Premium Oil Filters to ensure the seal operates in a debris-free environment.
Check Engine Fitment Verification
While common across the Theta II range, some specific export models may use different seal depths. To ensure the 21421-2G100 OIL SEAL is the perfect fit for your crankshaft, please contact us for professional verification using your chassis number.
Note: Images shown are for illustration purposes only and may not be an exact representation of the product.
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