BDFHYK Ignition Coil Pack & Iridium Spark Plug Kit UF557 + BY481ZFR5F — Set of 4, Direct Replacement for Jeep/Dodge/Chrysler

BDFHYK’s set pairs four UF557 ignition coil packs with iridium BY481ZFR5F spark plugs to restore reliable ignition for select Jeep, Dodge and Chrysler models.

If your vehicle is showing signs of rough idle, hard starts, or reduced throttle response after many miles, worn ignition coils and spark plugs are common causes. This kit is engineered as a direct-replacement assembly for numerous 2007–2019 model-year applications, combining coil packs built from durable materials with high-performance iridium plugs to help re-establish consistent firing and smoother running.

Which vehicles and engines does this kit fit?

This BDFHYK combination is designed for specific Jeep, Dodge and Chrysler models across several years. Confirm fitment by checking your vehicle’s OE part numbers before ordering.

• Compatible models include Jeep Patriot and Compass (2007–2017).
• Also fits Dodge Journey (2009–2019), Caliber (2007–2012), Avenger (2008–2014).
• Chrysler fit includes 200 (2011–2014), Sebring (2007–2010) and Cirrus (2008–2010).
• Verify OE references like UF557 / UF-557 and BY481ZFR5F against your vehicle.

How are the coil packs manufactured and what materials are used?

BDFHYK coil packs use materials chosen for longevity and stable electrical performance. The construction aims to resist heat and vibration common in modern engines.

• Core components utilize silicon steel for magnetic stability.
• High-grade insulating rubbers sourced from Japan improve sealing and heat resistance.
• Varnished winding wire meets elevated durability standards, sourced from German suppliers.
• Each coil is produced to match OE electrical and dimensional specifications.

What advantage do the iridium BY481ZFR5F spark plugs provide?

The iridium electrodes offer a refined spark path that supports cleaner combustion and reliable starts compared with worn conventional plugs. They are selected to work well alongside the UF557 coils for balanced ignition performance.

• Iridium tip reduces erosion for a longer service interval than standard plugs.
• Ceramic insulators help maintain consistent heat range and reduce misfires.
• Designed to improve throttle response and shorten cranking time when replacing aged plugs.
• Supplied as four plugs to replace a full bank or four-cylinder ignition group.

When should I replace both coils and spark plugs together?

Replacing coils and plugs as a matched set is recommended when either component shows age-related symptoms or when mileage exceeds typical service intervals. Swapping both improves compatibility and reduces repeat labor.

• Consider replacement after roughly 80,000 km or if you notice stumbling or misfires.
• Common signs include rough idle, slow acceleration, or increased fuel use.
• Changing both ensures the ignition system has uniform electrical characteristics.
• Buying a matched kit avoids mixing old parts with new parts that may mask underlying issues.

Who is this for: This BDFHYK ignition coil and spark plug set is for owners or technicians working on compatible Jeep, Dodge, and Chrysler vehicles who want a complete, direct-fit ignition refresh. It’s aimed at drivers experiencing ignition-related drivability issues or anyone performing scheduled maintenance who prefers a coordinated kit engineered from higher-grade materials. Always cross-check the listed OE numbers and vehicle fitment before purchase to ensure correct application.