X4XZ Ignition Coil & Double Iridium Spark Plug Kit — 4-Pack for Honda/Acura UF672/97390, Long-Life

If your Civic, HR-V or Acura ILX shows signs of misfires, rough idle, or reduced power, worn ignition coils and spark plugs are common culprits. This kit replaces OE part numbers 30520R1AA01 and C1823 with components designed to match or improve on factory specifications so installation is straightforward and functionality is dependable.

How will replacing these coils and plugs affect engine performance?

Fresh coils and double iridium plugs deliver more consistent sparks across all cylinders, which helps reduce misfires and stabilize idle. Improved spark reliability can lead to smoother acceleration and more predictable throttle response without altering engine tuning.

• Restores consistent combustion across cylinders
• Reduces misfire-related vibration and rough idle
• Helps maintain steady acceleration and power delivery
• Double iridium electrodes offer longer service life

Are these parts a direct fit for my vehicle?

The kit is built to replace the OE UF672 coil and 97390 plug formats and lists OE numbers like 30520R1AA01 and C1823 for cross-reference. It’s specified for Honda Civic 1.8L (2012–2015), Honda HR-V 1.8L (2016), and Acura ILX 2.0L (2013–2015); review vehicle fitment notes before purchase.

• OE reference numbers included for easy verification
• Designed to match factory connector and mounting points
• Plug heat range and coil impedance matched for these engines
• Check the second product image for extended fitment details

What are the durability and construction advantages?

The spark plugs use a double iridium tip that extends service life and maintains a stable spark gap over many miles. The ignition coils incorporate stainless-steel springs, an internal ferrite noise suppressor, and a thermoplastic connector that resists heat-related cracking.

• Double iridium plugs rated for long operational life
• Stainless-steel spring improves electrode contact and conductivity
• Noise suppressor limits radio-frequency interference
• Thermoplastic coil connector resists thermal cycling damage

What’s included and how easy is installation?

The package contains four ignition coil packs and four double iridium spark plugs—enough for a full 4-cylinder tune-up. No printed manual is included, but installation follows standard coil-and-plug replacement procedures and is typically straightforward for anyone comfortable with basic engine maintenance.

• Includes: 4 x UF672 ignition coils, 4 x 97390 double iridium plugs
• OE cross-references: 30520R1AA01, C1823, 2505-484835
• Common hand tools and torque specs required for proper installation
• Customer support available for fitment or installation questions

Who this kit is for: drivers and home mechanics who own the listed Honda or Acura models and want a full ignition refresh to address misfires, unstable idle, or declining driveability. It’s also suited to anyone seeking longer-lasting spark plugs and OEM-compatible ignition coils without modifying engine electronics. If you need one-to-one OE replacements with improved component longevity and reliable customer support, this X4XZ kit is a practical option.