A-Premium Ignition Coil and Iridium Spark Plug Kit for Mazda 2.0L/2.5L — Set of 4 Coils & 4 Iridium Plugs, Direct-Fit OE Specs

A-Premium Set of 4 ignition coils paired with four iridium spark plugs is a direct-fit replacement kit engineered for many Mazda 2.0L and 2.5L engines to restore reliable spark, smoother idling, and consistent starts.

This all-in-one kit from A-Premium combines four coil-on-plug ignition coils and four iridium-tipped spark plugs designed to meet factory fit and function for a broad range of Mazda models. The components are specified to the OE-style mounting, electrical resistance, and spark gap to ensure plug-and-play installation on compatible engines. Whether you’re replacing worn ignition parts or upgrading to longer-lasting iridium plugs, this kit gives a balanced approach to performance and longevity without complex tuning.

Which Mazda models will this ignition coil and spark plug kit fit?

The kit covers multiple Mazda sedans, crossovers, and the MX-5 Miata across several years — primarily 2.0L and 2.5L naturally aspirated engines without cylinder-deactivation systems. Always cross-reference your vehicle’s year, engine code, and the listed reference numbers before purchase.

• Compatible models include Mazda 3 (2012–2024 variations depending on engine), CX-3 (2016–2021), CX-30 (2020–2024), CX-5 (2013–2024), CX-9 (2016–2023), and MX-5 Miata (2016–2024).
• Designed for engines specified in the product fitment list: L4 2.0L and L4 2.5L ranges, with noted exceptions for cylinder-deactivation variants.
• Reference part numbers: UF656, PE0118100A, C1837 for quick cross-checking against OEM catalogs.

What are the technical specs and installation details I should know?

The coils and plugs follow OE-style electrical and mechanical specifications so installers can expect a straightforward swap. Torque, thread size, and resistance values are provided to help you install safely and achieve the correct connection and seating.

• Coil terminal count: 4 with blade terminals and bolt-on mount to the valve cover.
• Electrical specs: primary resistance approx. 0.85 Ω and secondary around 9.0 kΩ.
• Spark plug details: iridium+nickel central electrode, 12 mm thread diameter, recommended gap 1.0–1.1 in, installation torque 15–20 N·m.

How do iridium spark plugs improve performance and service life?

Iridium is a hard, refined alloy used on the central electrode that maintains a stable, fine-point spark for longer than conventional materials. This results in more consistent combustion, longer replacement intervals, and reliable starts across seasonal temperature changes.

• Longer service life — iridium can last significantly longer than standard nickel plugs.
• More stable idle and improved ignition consistency under load and cold starts.
• Potential for modest fuel efficiency and emissions benefits due to more complete combustion.

Does A-Premium back this kit with a warranty?

A-Premium stands behind the kit with a one-year unlimited-mileage guarantee covering manufacturing defects. This warranty provides extra assurance at the time of purchase but does not replace routine inspection and correct installation practices.

• One-year, unlimited-mileage coverage from A-Premium for manufacturing faults.
• Recommended to retain proof of purchase and document installation for warranty claims.
• Follow vehicle manufacturer torque and installation procedures to avoid damage.

Who is this for: The A-Premium 4-coil and 4-plug kit is aimed at DIY mechanics and professional technicians working on compatible Mazda 2.0L and 2.5L engines who want an OEM-style replacement with the durability of iridium plugs. It’s a practical choice for drivers seeking reliable starts, steadier idling, and extended spark-plug intervals without altering engine tuning. Verify fitment with your vehicle year and engine variant before buying to ensure correct compatibility.