Ignition Coil and Iridium Spark Plugs for Volvo S80 (1999-2006) 2.9L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 1999-2006 Volvo S80

Direct-Replacement Ignition System: Restores factory ignition energy, stabilizes secondary voltage, and eliminates cylinder misfires across all six cylinders on the 2.9L inline-six Volvo S80.

The Stock S80 Ignition Breakdown

On the Volvo P2 platform's Modular inline-six engine, ignition coils endure severe thermal cycling within the enclosed cylinder head valley under the top vanity cover. Over time, OEM epoxy encapsulation degrades, causing micro-fractures, secondary insulation breakdown, and voltage leakage. Combined with worn spark plugs exhibiting widening gaps that demand higher arc voltage, this degradation leads to rough cold starts, hesitation under load, erratic idle, and recurring P0300-P0306 misfire codes.

The Engineering Solution

This comprehensive service kit features six direct-fit coil-on-plug assemblies manufactured with high-conductivity oxygen-free copper secondary windings and high-dielectric epoxy potting to resist heat soak and prevent internal shorting. Paired with six fine-wire iridium spark plugs, the kit lowers ignition voltage requirements and optimizes flame kernel propagation for efficient, complete combustion and smooth throttle response without triggering false knock or CEL faults.

Technical Specifications

Compatibility

• 1999-2006 Volvo S80 2.9L 6-Cylinder Naturally Aspirated (B6294S, B6304S)
• 1999-2006 Volvo S80 2.9L 6-Cylinder Turbocharged T6 (B6294T)
• Interchange Part Numbers: UF341, 30713416, 307134160, 9125601, C1258, 5C1320, 178-8333, 0221604001

The Volvo Precision Standard

Engineered to comply with stringent European OBD-II tolerances, this ignition system maintains factory-calibrated impedance and secondary waveform integrity to keep your Motronic engine management system operating without check engine lights or fuel-trim drift.