Ignition Coil + Iridium Spark Plugs for Pontiac G6 Montana SV6 (2005-2006) 3.5L

Direct-Replacement Ignition Coil and Iridium Spark Plug Kit for 2005-2006 Pontiac G6 and Montana SV6 (Epsilon / U-Body)

What it Does: The Ignition Coil Pack and Iridium Spark Plug Kit restores complete combustion efficiency and eliminates cylinder misfires on the 2005-2006 Pontiac G6 and Montana SV6.

The Stock Pontiac G6 and Montana SV6 Thermal Breakdown Weakness

The High Value 3.5L LX9 V6 relies on a singular, consolidated coil pack assembly mounted closely to the cylinder block. Over continuous heat-cool cycles, ambient engine bay thermal transfer degrades the internal copper winding insulation and epoxy potting within factory units like 12595088. This thermal breakdown causes internal micro-arcing, secondary voltage drops, and severe unburned hydrocarbon fouling under load. Simultaneously, standard copper or worn platinum plugs develop widened spark gaps due to ground electrode erosion, placing excess electrical resistance back onto the primary driver circuit and causing hesitation, rough idle, and P0300 misfire DTCs.

The Engineering Solution

This comprehensive service package replaces degraded ignition components with a high-dielectric strength coil pack and high-efficiency iridium-tipped plugs. Built with upgraded copper primary and secondary windings encased in void-free polyurethane potting, the replacement unit resists heat-soak and voltage leakage. Paired with fine-wire iridium core center electrodes and thermal-shock resistant ceramic insulators, this system requires significantly lower quenching voltage to initiate spark. The result is instantaneous flame front propagation, stable dwell control across all operating RPMs, optimized fuel burn, and consistent cold-start ignition without stress on the factory ECU coil drivers.

Technical Specifications

Compatibility

• 2005 Pontiac G6 3.5L V6
• 2006 Pontiac G6 3.5L V6
• 2005 Pontiac Montana SV6 3.5L V6
• 2006 Pontiac Montana SV6 3.5L V6

Frequently Asked Questions

Does this fit the Epsilon and U-Body G6 and Montana SV6?

Yes, this is a direct fit for the 2005-2006 Pontiac G6 and Montana SV6 equipped with the 3.5L LX9 engine.

Are spark plug wires included in this tune-up kit?

No, this package includes only the 6-terminal consolidated coil pack and 6 iridium spark plugs; plug wires must be reused or purchased separately.

The Pontiac V6 Reliability Standard

Built to handle sustained daily commuting and family hauling demands, this ignition upgrade delivers heavy-duty secondary voltage stability and consistent combustion manners without throwing premature misfire codes.