Ignition Coil and Iridium Spark Plugs for Toyota Tacoma (2000-2004) 2.4L

Direct-Fit Ignition Coil & Iridium Spark Plug Kit for 2000-2004 Toyota Tacoma

What it Does: Restores factory secondary ignition output and combustion efficiency across all four cylinders to eliminate misfires, rough idle, and sluggish throttle response.

The Stock Tacoma Secondary Ignition Breakdown

Aging factory coil-on-plug packs on the 2.4L engine suffer internal insulation breakdown from chronic thermal cycling and under-hood heat soak. Over time, micro-fractures in the epoxy resin and degraded primary copper windings increase internal resistance, causing voltage leakage under load. Paired with eroded conventional spark plug electrodes that widen the gap beyond factory specification, the ignition system demands higher breakdown voltage than the tired coils can supply, resulting in intermittent P0300-P0304 misfire codes, degraded fuel economy, and unburnt hydrocarbon buildup.

The Engineering Solution

This complete refresh kit features four heavy-duty coil-on-plug assemblies engineered with high-conductivity copper primary and secondary windings encased in high-dielectric epoxy to prevent internal arcing. Factory-molded thermoplastic housings resist heat degradation, while direct-fit blade connectors eliminate signal resistance. The included pre-gapped iridium spark plugs utilize fine-wire center electrodes with a high melting point, lowering required ignition voltage, sharpening spark discharge kernel propagation, and delivering stable combustion through high-mileage duty cycles.

Technical Specifications

Compatibility

• 2000-2004 Toyota Tacoma Base: 2.4L L4 (2RZ-FE) 2WD Standard Cab & Extended Cab
• 2001-2004 Toyota Tacoma S-Runner: Fits auxiliary 2.4L 2RZ-FE utility applications

The Toyota Truck Caliber

Engineered for relentless reliability, this ignition overhaul ensures your first-generation Tacoma maintains dependable cold-start behavior, consistent payload torque, and long-range durability under continuous daily and commercial hauling demands.