<h2>Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2003-2008 Mazda 6</h2> <p><strong>What it Does:</strong> Complete 6-cylinder ignition overhaul kit engineered to eliminate engine misfires, restore lost combustion efficiency, and stabilize idle across all RPM bands.</p> <h3>The Stock Mazda 6 Coil Weakness</h3> <p>The AJ 3.0L V6 in the GG chassis mounts Bank 1 ignition coils directly beneath the upper intake plenum where ambient engine bay heat concentrates. Over time, extreme thermal cycling degrades the factory coil-on-plug epoxy potting and dielectric insulation, causing internal shorting, micro-arcing, and carbon tracking. This degradation leads to hesitation under load, poor fuel economy, and P0300-P0306 misfire trouble codes.</p> <h3>The Engineering Solution</h3> <p>This kit features reinforced coil packs constructed with high-grade electrolytic copper windings, high-dielectric epoxy potting, and thermal-resistant thermoplastic housing to resist heat soak and voltage breakdown. Paired with fine-wire iridium spark plugs, the assembly produces a focused, high-energy spark kernel with reduced quenching, ensuring complete air-fuel burn, crisp throttle response, and extended service intervals.</p> <h3>Technical Specifications</h3> <table width="100%" style="border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;"> <tr style="background-color: #f9f9f9;"> <td style="padding:8px;"><strong>Fitment</strong></td> <td style="padding:8px;">2003-2008 Mazda 6 (3.0L V6)</td> </tr> <tr> <td style="padding:8px;"><strong>Engine / Chassis</strong></td> <td style="padding:8px;">3.0L MZI AJ / GG Chassis</td> </tr> <tr style="background-color: #f9f9f9;"> <td style="padding:8px;"><strong>Stock Output</strong></td> <td style="padding:8px;">220 hp / 192 lb-ft (Approx)</td> </tr> <tr> <td style="padding:8px;"><strong>Part Number / Interchange</strong></td> <td style="padding:8px;">UF406, FD502, DG500, UF-406</td> </tr> </table> <h3>Compatibility</h3> <ul> <li>2003-2008 Mazda 6 s (3.0L V6 DOHC) - Sedan, Hatchback, Wagon</li> <li>2006-2008 Mazda 6 Grand Touring (3.0L V6 DOHC)</li> <li>2006-2008 Mazda 6 Sport (3.0L V6 DOHC)</li> <li>2006-2008 Mazda 6 Touring (3.0L V6 DOHC)</li> </ul> <h3>The Mazda Performance Standard</h3> <p>Built for the spirited driving dynamics of the GG chassis, this ignition system ensures immediate spark delivery and smooth high-rev power transfer to keep your V6 operating at factory performance specs.</p>