Description
21443-33005 OIL SEAL: Hyundai-Kia Engine Guide
Rear Crankshaft Main Seal | Sonata, Santa Fe, Optima & Sorento
The 21443-33005 OIL SEAL is the essential engine component designed to restore the lubricant integrity of your Hyundai or Kia 2.0L / 2.4L engine. This professionally engineered seal ensures maximum protection against oil leaks at the rear of the block, consistent crankcase pressure, and superior structural integrity under the thermal stresses of daily driving. This component is critical for maintaining the professional performance of your vehicle’s original engine configuration.
21443-33005 OIL SEAL Fitment
- Hyundai Sonata (EF/NF/YF): 2.0L / 2.4L
- Hyundai Santa Fe (SM/CM): 2.4L Models
- Kia Optima (MS/MG/TF): 2.0L / 2.4L
- Kia Sorento (XM): 2.4L Theta II
- OE Part Number: 21443-33005
Technical Engine Specs
- Engine Family: Sirius / Theta / Theta II
- Position: Rear Main (Flywheel Side)
- Material: Specialized FKM (Viton) Rubber
- Type: High-Durability Rotary Shaft Seal
- Standard: OE Precision Tolerance
Benefits for Drivetrain Integrity
Choosing this specific sealing unit is vital for protecting your vehicle’s clutch or torque converter from oil contamination. Because the rear main area is difficult to access, selecting a premium seal ensures that oil stays within the engine block, preventing expensive repairs to the Transmission Assembly. Proper installation is key; therefore, we strongly recommend browsing our Engine Oil Pumps if you are performing a complete overhaul.
Furthermore, to maximize the lifespan of your powertrain, you may also consider inspecting our Premium Oil Filters. Vehicle longevity often depends on the perfect harmony between internal sealing and pressure management. While replacing your rear seal, it is professional practice to verify the condition of the crankshaft mounting surface.
The Sirius and Theta engine series have minor seal dimension variations between manual and automatic transmission variants in some regions. To ensure the 21443-33005 OIL SEAL is the perfect fit for your specific vehicle, 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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