Ignition Coil and Iridium Spark Plugs for Mazda CX-5 (2019-2020) 2.5L

Direct-Fit Ignition Coil and Iridium Spark Plug Service Kit for 2019-2020 Mazda CX-5

Primary Function: Restores factory secondary ignition voltage and resolves multi-cylinder misfires, rough idle, and unburnt hydrocarbon buildup in SkyActiv-G powertrains.

The Stock CX-5 High-Compression Ignition Breakdown

The high 13.0:1 compression ratio of the SkyActiv-G 2.5L engine places severe thermal and electrical loads on factory ignition components. Over time, OEM coil pack epoxy insulation degrades under sustained cylinder head heat soak, causing secondary winding breakdown and internal dielectric puncture. Combined with gradual spark plug center electrode erosion, this creates increased coil resistance, leading to intermittent misfire codes (P0300-P0304), sluggish throttle response, and incomplete flame propagation during high-load combustion cycles.

The Engineering Solution

This complete ignition overhaul kit features four coil-on-plug assemblies engineered with high-conductivity copper primary and secondary windings, coupled with high-temperature epoxy potting to resist thermal degradation and internal flashover. Paired with fine-wire iridium spark plugs offering superior melting points and low required firing voltage, this kit ensures stable arc generation, rapid flame front propagation, and reliable cold-start ignition under demanding load conditions.

Technical Specifications

Compatibility

• 2019 Mazda CX-5 (Sport, Touring, Grand Touring) - 2.5L L4 Gas
• 2020 Mazda CX-5 (Sport, Touring, Grand Touring) - 2.5L L4 Gas

The Mazda Driving Precision Standard

Engineered to preserve the sharp throttle response and direct power delivery of Mazda's SkyActiv platform, this ignition service kit eliminates spark latency to keep your crossover running at peak combustion efficiency.