Description

21421-03000 OIL SEAL: Front Crankshaft Guide

Durable Leak Protection | i10, i20 & Picanto 1.2L Kappa

The 21421-03000 OIL SEAL is the essential engine component designed to restore the fluid integrity of your Hyundai or Kia Kappa series engine. This professionally engineered unit ensures maximum lubricant retention, providing a clean engine bay and superior structural integrity.

21421-03000 Fitment Guide

  • Hyundai i10 / Grand i10: 1.0L & 1.2L Kappa
  • Hyundai i20 / Bayon: 1.2L Engine
  • Kia Picanto / Morning: 1.0L & 1.2L (TA/JA)
  • Kia Rio / Stonic: 1.2L Kappa Models
  • Part Number: 21421-03000

Technical Product Specifications

  • Material: High-Temp Nitrile (NBR) / ACM
  • Type: Front Crankshaft Radial Seal
  • Inside Diameter: OE Kappa Standard
  • Features: Internal Tensioning Spring
  • Standard: OE Precision Grade

Benefits of a New 21421-03000 OIL SEAL

Choosing the correct replacement part is vital for protecting your drive belts and alternator from oil soak. Using a premium 21421-03000 OIL SEAL ensures that your engine stays lubricated and efficient, preventing costly repairs caused by low oil levels. We strongly recommend browsing our Drive Belts and Oil Filters to ensure a complete and professional engine maintenance cycle.

Confirm Your Professional Fitment

To ensure this oil seal is the perfect fit for your specific Kappa engine variant, please contact us for professional verification using your chassis number.


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Note: Technical data for 21421-03000 is for reference; please verify with your engine code before installation.

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Questions and Answers

What is the primary function of this sealing component?
It creates a dynamic barrier around the front nose of the crankshaft to keep engine oil contained within the block while rotating at high speeds.
Which engines utilize the 21421-03000 OIL SEAL?
It is a standard fitment for the 1.0L and 1.2L Kappa engine families found in most Hyundai and Kia small passenger cars.
What are the common symptoms of a failing front crank seal?
Look for oil dampness around the harmonic balancer (main crank pulley), oil spray on the alternator or belts, or dark spots on the floor under the front of the engine.
Is this component a direct replacement for the original part?
Absolutely. This part is manufactured to meet exact OE dimensional specifications using high-heat resistant rubber for a professional, leak-free fit.
Why should I replace the 21421-03000 seal if it’s only "sweating"?
A "sweating" seal often precedes a total failure. Replacing it early prevents oil from reaching the rubber drive belts, which can cause them to slip or snap prematurely.

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