Walker 921-2018 Ignition Coil

Walker ThunderSpark Ignition Coil 921-2018

Walker ThunderSpark ignition coil 921-2018 is a direct-fit ignition coil for select Hyundai and Kia applications. It is built for vehicles that need consistent spark output for reliable engine operation, including Hyundai Sonata, Hyundai Santa Fe, Kia Magentis, and Kia Optima fitments.

Key Features

• Ignition coil for select Hyundai and Kia vehicles
• Walker ThunderSpark product line
• Direct replacement fitment for listed applications
• Supports stable spark delivery for engine ignition systems
• Fits 1999-2006 Hyundai Sonata, Hyundai Santa Fe, Kia Magentis, and Kia Optima applications listed below

Fitment Details

• Fits 2005-2006 Hyundai Santa Fe, Single Coil
• Fits 2001-2006 Kia Magentis, Single Coil
• Fits 2006 Kia Optima, ThunderSpark
• Fits 1999-2005 Hyundai Sonata, ThunderSpark
• Fits 2001-2005 Kia Optima, For Cylinder 2,4; ThunderSpark
• Fits 2001-2004 Hyundai Santa Fe, ThunderSpark

What It Helps Address

• Engine misfire caused by a weak ignition coil
• Hard starting related to inconsistent spark output
• Rough idle from ignition system wear
• Loss of power under load from coil degradation
• Check engine light concerns tied to ignition performance

Installation Notes

Verify the year, make, model, and notes before ordering. This part number, 921-2018, must match the vehicle application and coil location or cylinder note shown in the fitment data. Inspect related ignition components during replacement to confirm the source of the fault.

Quality Assurance

Walker ThunderSpark 921-2018 is cataloged for the listed Hyundai Sonata, Hyundai Santa Fe, Kia Magentis, and Kia Optima applications and should be matched to the exact fitment notes for proper installation.