Ignition Coil and Iridium Spark Plug Kit for Mazda 3 6 CX-7 MX-5

In this review of the ECCPP UF540 ignition coil and iridium spark plug kit, the bottom line is simple: this pack is for Mazda owners who want an affordable, plug-and-coil refresh that can restore smooth running and reduce misfires. The kit replaces OEM UF540 and related part numbers and is aimed at 2006-2013 Mazda 3, CX-7 and MX-5 variants with 2.0L, 2.3L and 2.5L engines. It delivers easier starts and a noticeable improvement in engine smoothness for many users, although durability can be mixed based on customer reports.

Key Features

• Direct Compatibility: Designed to replace OEM UF540 and related numbers, so fitment for specified Mazda 2006-2013 models is straightforward and minimizes fitment issues.
• Complete Kit: Includes four ignition coils and four iridium spark plugs, allowing all cylinders to be serviced at once for balanced performance and fewer installation trips.
• Improved Spark Energy: ECCPP states the coils provide about 15% more energy than OE coils, which can help with ignition efficiency and reduce misfire events in many cars.
• Durable Construction: Built with high conductive copper wire and high dielectric epoxy plus corrosion-resistant connections to promote long service life and reliable electrical connectivity.
• Performance Focus: The upgraded coil and plug combination targets smoother idle, better cold-start behavior, and improved throttle response when compared to worn factory parts.

Who It's For

The kit is best for Mazda owners with 2006-2013 3 series, 2006-2009 3 with 2.3L, 2010-2013 3 with 2.5L, 2012 3 Sport 2.0L, CX-7 and MX-5 drivers who are experiencing misfires, rough idle, or want to proactively replace old coils and plugs. It is also suitable for DIY mechanics who prefer to replace all coils and plugs together for consistent performance.

Drivers who require OEM-backed long-term warranties or who need verified commercial-grade longevity may want to consider dealer parts or extended-warranty options instead, since some customer reports indicate early failures for a subset of units.

Pros & Cons

Pros

• Restores smooth running and reduces misfires for many users when replacing worn factory coils and plugs.
• Complete 4-coil and 4-plug set makes simultaneous replacement simple and keeps ignition timing consistent.
• Good initial value and ease of installation, with many reviewers noting quick fit and improved engine smoothness.

Cons

• Some customers reported durability concerns with failures occurring in under a month, so longevity may vary by unit.

Specifications

Our Verdict

The ECCPP UF540 4-coil and 4-plug kit is a practical, cost-effective option for Mazda owners who need to cure misfires and improve engine smoothness without paying dealer prices. It fits stated Mazda model years directly and offers higher spark energy and updated materials, making it good value for DIY maintenance. Buyers should be aware of mixed durability reports and consider warranty coverage if long-term reliability is critical.

Frequently Asked Questions

Will this kit fit my Mazda 3 built in 2011?
Yes, it is listed as compatible with Mazda 3 2010-2013 2.5L and other specified model years and engines.

Should I replace coils and plugs together?
Yes, replacing all coils and plugs together helps restore balanced ignition across cylinders and reduces the chance of repeat misfire issues.

Are these OEM parts?
The kit is aftermarket but built to meet or exceed OE specifications; it replaces OEM part numbers like UF540 and related codes for compatibility purposes.