BDFHYK Ignition Coil Pack Set of 4 UF557/IC637 Compatible — Direct-Fit OE-Style Coils for Jeep, Dodge, Chrysler 4‑Cyl

BDFHYK UF557 ignition coil pack set of 4 is a direct-fit replacement designed to restore spark performance for select Jeep, Dodge and Chrysler 4-cylinder engines.

These coil packs are built as OE-style replacements for vehicles using UF557/IC637 compatible coils. Constructed from high-quality PBT and PPO materials and fitted with original-style chips, the set aims to deliver consistent spark, resist heat and corrosion, and reduce misfire symptoms when installed alongside properly maintained spark plugs. Before ordering, verify fitment by year, make, model and OE number to ensure compatibility with your specific engine.

Which vehicles and engines will these coils fit?

These BDFHYK coils are engineered for several Chrysler Group 4-cylinder platforms. They cover multiple model years of Jeep Patriot, Jeep Compass, Dodge Journey, Dodge Caliber, Dodge Avenger and Chrysler 200 / Sebring when those vehicles use the listed OE numbers.

• Jeep Patriot 2007–2017, Jeep Compass 2007–2017
• Dodge Journey 2009–2020, Dodge Caliber 2007–2012, Dodge Avenger 2008–2014
• Chrysler 200 2011–2014, Chrysler Sebring 2007–2010
• Compatible OEM numbers: UF557, IC637 and related part references listed in product details

How does installing these coils affect engine performance?

Replacing worn or failing coils with this set can restore reliable ignition and reduce symptoms tied to weak spark, such as hesitation, rough idle, or reduced fuel economy. Results depend on overall ignition system health, so pair coil replacement with fresh spark plugs and correct wiring for best outcome.

• Restores stronger, more consistent spark to each cylinder
• Reduces misfires and engine hesitation when spark plugs are in good condition
• Improves starting reliability and steadier idle response
• Helps maintain intended fuel efficiency if other systems are functioning

What are the build and quality features of these BDFHYK coils?

BDFHYK coils use durable polymer housings and original-style electronic chips to replicate OE characteristics and heat resistance. The materials cited (German PBT and US-sourced PPO) are intended to increase corrosion and wear resistance; installation is designed to be a direct plug-in for compatible applications.

• PBT and PPO housings for improved heat and chemical resistance
• Original-spec chip for consistent electrical performance
• Direct replacement form factor for straightforward installation
• Sold as a set of four to service all cylinders on most 4-cylinder applications

How should I install and maintain these coils for longest life?

Installation is generally a plug-and-play replacement; however, always follow vehicle service manual procedures and take precautions around the battery and ignition system. Prolong coil life by replacing aged spark plugs, keeping connectors clean and avoiding oil or coolant leaks near the coils.

• Replace spark plugs if they show wear before installing new coils
• Inspect wiring harnesses and connectors for corrosion or damage
• Torque mounting bolts to factory specifications and ensure snug electrical connections
• Address nearby leaks (oil/coolant) that can degrade coil housings

Who is this for: This set is for DIY mechanics and professional technicians who need a cost-effective, OE-style ignition coil replacement for 1.8L, 2.0L and 2.4L 4-cylinder Jeep, Dodge and Chrysler engines that accept the UF557/IC637 family of parts. Choose this kit when you want a complete four-coil service, prefer parts built with higher-grade polymers, and have confirmed fitment with your vehicle’s year, model and OE part number.