Ignition Coil & Spark Plugs for Pontiac Bonneville (1988-2005) 3.8L V6

High-Output Ignition Coil & Spark Plugs for 1988-2005 Pontiac Bonneville

What it is for: Restores proper combustion and eliminates misfires by replacing degraded factory ignition coils and fouled plugs with high-voltage replacements.

The Stock Bonneville Ignition Weakness

The OEM GM 3800 ignition system, particularly on the H-Body and G-Body platforms, is notoriously susceptible to thermal breakdown over time. The original ignition coils sit directly atop the engine module, absorbing immense radiant heat. This continuous heat soak degrades the internal epoxy potting, leading to micro-cracks in the coil housing. Once the insulation fails, high voltage leaks occur, resulting in weak spark delivery, hesitation under load, erratic idling, and inevitable P0300-series misfire codes. Furthermore, aging copper or early platinum plugs compound the issue by increasing the resistance gap, forcing the weakened coils to work even harder until complete failure.

The Engineering Solution

This comprehensive tune-up kit resolves these common 3.8L faults by utilizing upgraded materials engineered for high-heat environments. The included ignition coils feature high-grade copper windings and premium dielectric epoxy that resists thermal cycling and prevents voltage breakdown. By maintaining a stable, high-energy voltage output, these coils ensure a complete burn in the combustion chamber. Paired with 6x NGK spark plugs, which offer superior electrode durability and precise gap retention, this system lowers the electrical strain on the ignition module. ISO/TS16949 certification ensures these components meet strict dimensional and electrical tolerances, matching factory output for reliable cold starts, smooth acceleration, and optimal fuel economy.

Technical Specifications

Compatibility

• 1988-2005 Pontiac Bonneville (3.8L V6 Naturally Aspirated Models)
• Replaces OEM Part Numbers: 10467067, 10468391, 10472401, 10477602, 10482928, 10497771, 89056799, D545, D555, D576
• Cross-Reference: EBC1518, 26C1005, IGC0102, CDR39, 178-8206, GN10123, GN10150, GN10161, IC39, 342J, 343P, 344N

The Pontiac Standard

Built to handle the heavy demands of a daily-driven GM sedan, this ignition upgrade restores the torquey, reliable power delivery the 3800 V6 is legendary for, keeping your Bonneville running strong without the nuisance of erratic performance and Check Engine Lights.