Ignition Coil and Iridium Spark Plugs for Mazda B4000 (2008-2010) 4.0L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2008-2010 Mazda B4000

What it Does: Delivers high-dielectric secondary voltage and ultra-fine spark kernel propagation to eliminate ignition misfires and restore combustion efficiency in the 4.0L V6 powertrain.

The Stock B4000 Ignition Breakdown

The Cologne 4.0L SOHC engine subjects ignition components to intense thermal cycling within a compact engine bay. Over time, factory coil packs experience internal dielectric potting degradation and micro-fracturing along the winding insulation. This thermal stress causes secondary voltage leakage, carbon tracking, and high-load spark blowout under towing conditions. Coupled with standard electrode erosion on factory plugs, increased gap resistance places excessive amperage strain on the ignition driver circuit, resulting in rough idle and compromised fuel economy.

The Engineering Solution

This complete 6-cylinder refresh kit pairs high-output direct-replacement ignition coils with fine-wire iridium spark plugs. The coil assemblies feature high-purity electrolytic copper primary and secondary windings encased in void-free epoxy resin to resist heat soak and vibration. Direct-fit blade connectors ensure zero-resistance signal transfer. The matched iridium plugs feature laser-welded fine-wire center electrodes and trivalent metal plating, requiring lower strike voltages while resisting thermal fouling and gap degradation under continuous load.

Technical Specifications

Compatibility

• 2008 Mazda B4000 Base, DS, SE 4.0L V6 Gas
• 2009 Mazda B4000 Base, DS, SE 4.0L V6 Gas
• 2010 Mazda B4000 Base, DS, SE 4.0L V6 Gas

The Mazda Truck Standard

Engineered to withstand heavy payload hauling and off-pavement vibration, this heavy-duty ignition package delivers consistent high-kV output to keep your truck running smooth across all operating temperatures.