ILONPA Front CV Axle Shaft Assembly 2-Pack — Direct-Fit for Hyundai Sonata (2015–2019) & Kia Optima (2016–2020) 2.4L

ILONPA front CV axle shaft assembly 2-pack replaces both driver and passenger front half-shafts for 2.4L naturally aspirated Hyundai Sonata (2015–2019) and Kia Optima (2016–2020) submodels.

These paired front axle shafts are engineered to restore reliable power transfer from the transmission to the front wheels, matching OE spline counts and compressed lengths for a direct-fit replacement. They are supplied as a driver-side and passenger-side set and include design features intended to resist leakage and wear so you can refit your vehicle with fewer unforeseen issues.

Will these axles fit my Sonata or Optima?

These shafts are built specifically for naturally aspirated 2.4L engines and fit only the listed submodels. Verify your vehicle year and trim before ordering, and compare OE part numbers or the product photos to your original axle to confirm compatibility.

• Compatible models: Hyundai Sonata 2015–2019 (Limited/SE/SEL/Sport submodels)
• Compatible models: Kia Optima 2016–2020 (EX/LX/S/Special Edition submodels)
• Check OE numbers: replaces 66-3829, 60-3829, 663829, 603829, 66-3830, 663830
• Also replaces: 49501C2260, NCV71001K, 49500C2210

What are the exact dimensions and splines of each shaft?

Each half-shaft is specified with compressed length and spline counts so installers can match them to the originals. The left and right shafts differ in length but share the same spline counts and ABS interface.

• Left (driver) compressed length: 26.48 inches
• Right (passenger) compressed length: 38.36 inches
• Outer spline: 30 teeth; Inner spline: 27 teeth
• ABS encoder spline: 48 teeth on both shafts

How are these axles constructed for durability and leak resistance?

The assembly uses reinforced boots, heavy-duty clamps, and treated internal components to improve service life and reduce common failure modes. Ball cages undergo thermal normalization and raceways are precision-ground to maintain stability under load.

• Half-shaft rubber protectors for easier installation and better sealing
• Heavy-duty clamps to minimize grease leaks at the joints
• Ball cages normalized for consistent strength and stability
• Precision-ground raceways and ball surfaces to extend component life

What should I check before I buy and install these axles?

Always confirm fitment with your vehicle information and compare the pictured item to your existing axle. Follow the seller’s fitment prompts and review the special notes section to avoid ordering the wrong part.

• Enter year, make, model and trim in the fitment checker on the product page
• Compare OE part numbers printed in the listing with your original axle
• Inspect the provided photos to confirm ABS ring and splines match
• Consider professional installation if you’re unfamiliar with suspension work

Who is this for: This ILONPA front CV axle 2-pack is intended for DIY mechanics, independent shops, and fleet maintainers who need OE-alike half-shafts for naturally aspirated 2.4L Hyundai Sonata (2015–2019) or Kia Optima (2016–2020) submodels. Choose this set when you need matching left and right axles with verified spline counts, ABS compatibility, and reinforced seals to restore driveline function without sourcing individual components.