Ignition Coil and Iridium Spark Plugs for Mazda B4000 (1994-2004) 4.0L

Direct-Fit Ignition Service Kit for 1994-2004 Mazda B4000

What it Does: Provides a complete secondary ignition refresh to eliminate engine misfires, restore clean combustion, and stabilize voltage delivery under load.

The Stock B4000 Dielectric Breakdown

Prolonged heat cycling and engine bay vibration severely degrade the factory ignition components on the 4.0L Cologne V6. Over time, internal epoxy insulation deteriorates, leading to primary winding resistance drift, thermal shorting, and micro-cracking in the coil housing. This breakdown allows secondary voltage arc-through, creating rough idling, hesitant throttle response, unburnt hydrocarbon build-up, and lost torque during heavy towing cycles.

The Engineering Solution

This comprehensive kit restores proper ignition dynamics using high-density thermoplastic housings and heat-resistant internal copper windings engineered to resist thermal degradation. Paired with fine-wire iridium spark plugs, the assembly produces a focused, stable spark kernel at lower firing voltages. Direct-fit blade terminals and factory-matched electrical connectors ensure consistent continuity without harness modification.

Technical Specifications

Compatibility

• 1994-2004 Mazda B4000 Base 4.0L V6
• 1994-2004 Mazda B4000 SE 4.0L V6
• 1994-2004 Mazda B4000 LE 4.0L V6
• 1994-2004 Mazda B4000 DS 4.0L V6
• 1994-2004 Mazda B4000 Cab Plus / 4WD 4.0L V6

The Mazda Truck Standard

Engineered for workhorse durability, this ignition kit maintains consistent spark delivery under sustained payloads and off-road operating demands.