Description
21321-42031 OIL SEAL: Hyundai D4B Series Guide
Timing Case Oil Seal | H100, Starex, Galloper & Bongo
The 21321-42031 OIL SEAL is the essential engine component designed to restore the lubricant integrity of your Hyundai or Kia 2.5L D4B diesel engine. This professionally engineered unit ensures maximum protection against leaks within the timing assembly, providing consistent internal pressure and superior structural integrity.
21321-42031 OIL SEAL Fitment
- Hyundai H100: 2.5D (D4BA/D4BH)
- Hyundai Starex / H1: 2.5 Diesel
- Kia Bongo / K2500: 2.5L Engines
- Hyundai Galloper: 2.5 TD Models
- OE Part Number: 21321-42031
Technical Engine Specs
- Engine Family: 2.5 Diesel (D4B Series)
- Position: Inner Timing Case
- Material: Reinforced Polyacrylate
- Type: Radial Shaft Seal
- Standard: OE Precision Grade
Reliable Engine Protection
Choosing this specific component is vital for protecting your diesel engine’s timing system. Selecting a premium 21321-42031 OIL SEAL ensures that no oil bypasses the inner cover, preventing premature belt wear. We strongly recommend browsing our Timing Belt Kits to ensure a complete and professional engine service.
Check Fitment Verification
To ensure this part is the perfect fit for your specific chassis, 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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