KacuYelin Ignition Coil Pack & Iridium Spark Plug Kit — Set of 4 for Honda Civic/Fit 2015–2020, OEM Fit

KacuYelin UF749 coil pack and iridium spark plug kit is a direct-fit replacement set of four engineered to restore ignition reliability and optimize fuel burn for Honda Civic and Fit 2015–2020 1.5L and 2.0L engines.

This complete ignition kit pairs high-purity German-style coil construction with long-life iridium spark plugs to offer a plug-and-play upgrade that matches OEM specifications (replaces UF749, CM11121A, 305205RO013, 305205RO003). Designed and manufactured in TS16949-certified facilities, the set aims to reduce misfires, improve throttle response and help maintain steady combustion across typical driving conditions.

How will these coils and plugs affect starting and engine smoothness?

The KacuYelin coil pack delivers consistent high-voltage output while the iridium plugs create a concentrated, stable spark. Together they reduce ignition failures and can restore crisp starts and smoother idles compared with worn components.

• German-imported copper windings and silicon steel core in each coil for steady voltage delivery.
• 360° continuous laser-welded iridium center electrode for concentrated spark energy.
• High-temperature epoxy and alumina ceramic insulation to resist heat-related degradation.
• Direct OEM fit reduces installation complexity — no modifications required.

Will this kit improve fuel economy or reduce emissions?

Improved ignition stability often leads to more complete combustion, which can help reduce fuel waste and lower emissions under normal operating conditions. While results vary, properly functioning coils and iridium plugs commonly produce measurable gains in efficiency.

• Optimized spark timing and strength improves fuel burn consistency.
• Iridium electrode and high-quality ceramic reduce carbon buildup on plugs.
• Manufacturer testing indicates potential fuel-efficiency improvements when replacing degraded parts.
• Parts are designed to meet EPA-related durability expectations for reduced emissions.

Are these parts an easy fit for my 2016–2020 Honda Civic or 2015–2020 Fit?

This kit is produced to match OEM form and function and replaces the listed OE numbers, making it a direct plug-and-play swap in compatible models. To be sure you get the correct item, verify year, model, engine size and aspiration before purchasing.

• Compatible models: Honda Civic 2016–2020 2.0L, Honda Fit 2015–2020 1.5L.
• Replaces part numbers UF749, CM11121A, 305205RO013, 305205RO003.
• Exact-fit connectors and mounting points for hassle-free installation.
• Seller recommends confirming vehicle info in the fitment navigator before checkout.

How durable are the coils and spark plugs, and what maintenance is recommended?

Coils use corrosion-resistant materials and high-temperature formulations to preserve performance, while iridium plugs are designed for extended service life. Regular inspections and following manufacturer-recommended replacement intervals will sustain optimal function.

• Iridium plugs: nickel-plated body, high alumina ceramic, lifespan typically long compared to standard plugs.
• Coils: high-purity copper windings and epoxy potting for heat and moisture protection.
• Inspect boots, connectors, and plug gaps at routine service intervals.
• Replace as a set to maintain balanced ignition across cylinders.

Who is this for: The KacuYelin UF749 ignition coil pack and iridium spark plug kit is intended for Honda owners, DIY mechanics and professional technicians who need a direct-fit, durable replacement for worn ignition components on 2015–2020 Civic and Fit 1.5L/2.0L engines. Choose this kit if you want OEM-compatible parts manufactured in certified facilities that emphasize consistent high-voltage delivery, concentrated spark performance and longer service life without complicated installation.