X4XZ UF557 Ignition Coil & 4503 Double Iridium Spark Plug Kit for 2007–2017 Jeep Compass — 4-Pack, Direct-Fit, Improved Durability

X4XZ UF557 ignition coil kit with four 4503 double-iridium spark plugs replaces worn coils and plugs on 2007–2017 Jeep Compass engines for smoother starts and steadier performance.

This complete 4-pack combines OE-replacement UF557 ignition coils with durable 4503 double iridium spark plugs designed for compatible 2.0L and 2.4L inline-4 Jeep and related Chrysler/Dodge vehicles. Each coil follows OEM form and connection standards while the double iridium plugs deliver a longer, more consistent service life and precise spark delivery. The set is intended as a direct-fit service kit for models listed below and ships ready to install with four coils and four plugs.

Which vehicles and engines fit this X4XZ coil and spark plug kit?

The kit is engineered for many Chrysler, Dodge and Jeep models using 2.0L or 2.4L L4 engines from model years roughly 2007–2016/2017. Confirm compatibility with your VIN or vehicle’s OEM part numbers before ordering to avoid returns.

• Common fits: 2007–2016 Jeep Compass and Patriot (2.0L, 2.4L)
• Dodge fits include Avenger, Caliber, Journey with listed engine variants
• Some Chrysler 200 and Sebring 2.4L model years also compatible
• See OE numbers UF557 / 4503 and cross-references like 5C1644, C1587 to verify fit

How do these coils and iridium plugs improve everyday driving?

Replacing aged coils and worn plugs can eliminate misfires, reduce rough idle, and restore throttle response. The X4XZ coils match OE electrical connectors and use thermoplastic housings and ferrite suppression to maintain consistent high-voltage transfer.

• Double iridium tips last significantly longer than standard electrodes
• Improved spark consistency helps stabilize idle and cold starts
• Noise suppressor reduces radio frequency interference
• Direct-fit design minimizes installation time and alignment issues

What installation and maintenance steps should I expect?

Installation is straightforward for anyone comfortable with basic engine work: remove the old coil packs and plugs, fit the new iridium plugs with proper gap, and install the new coils. Torque plugs and coils to manufacturer specs and replace one cylinder at a time to avoid mix-ups.

• Tools needed: ratchet, spark plug socket, torque wrench, anti-seize optional
• Replace plugs and coils in matched sets for balanced performance
• Inspect boots and wiring harnesses; address cracked boots before reinstall
• After installation, clear DTCs and verify smooth idle and no misfire codes

What quality details and part numbers come with the package?

X4XZ supplies four UF557 ignition coil packs plus four 4503 double iridium spark plugs, built to meet or exceed OE specifications. The kit cross-references multiple OEM and aftermarket numbers for easy verification against your vehicle parts list.

• Included: 4 x ignition coils (UF557) and 4 x double iridium plugs (4503)
• Cross-reference: 5C1644, C1587, C1588, 4606824AB/AC, E1057, PK16TT and others
• Coil features: stainless-steel spring, ferrite noise suppressor, thermoplastic connector
• Spark plug life: double iridium design for extended service intervals (up to high mileage)

Who this kit is for: drivers and DIY mechanics who own compatible Jeep Compass/Patriot, Dodge, or Chrysler models and need a cost-effective, OE-style replacement to cure misfires, improve start-up smoothness, and extend spark plug service life. It’s also suitable for professional shops performing routine ignition system maintenance and customers who prefer matching coils and plugs installed together for predictable performance.