Ignition Coil and Iridium Spark Plugs for Volvo S80 (2005-2006) 2.5L

Direct-Fit Ignition Tune-Up Kit for 2005-2006 Volvo S80

Primary Function: Restores factory secondary ignition output and precise combustion timing to eliminate high-load misfires and erratic idling across all five cylinders.

The Stock S80 Ignition Breakdown

The compact head design on Volvo's modular 5-cylinder engine traps significant thermal energy beneath the spark plug cover. Over extended heat cycles, factory coil housings develop micro-fissures in the outer epoxy casing, allowing high-voltage arc leakage directly to the cylinder head rather than the spark plug electrode. Combined with gradual electrode erosion on standard plugs, this resistance increase overburdens the primary windings, resulting in hesitations, P0301-P0305 diagnostic trouble codes, and unburnt fuel degradation of the catalytic converter.

The Engineering Solution

This comprehensive ignition pack delivers five matched direct-ignition coil assemblies paired with laser-welded iridium spark plugs. Each coil-on-plug unit features high-conductivity internal copper windings insulated with premium dielectric resin to prevent internal shorting under high boost pressures. The accompanying iridium spark plugs maintain a precise spark gap under extreme temperatures, demanding lower firing voltage while providing a stable, efficient flame kernel.

Technical Specifications

Compatibility

• 2005 Volvo S80: 2.5T, 2.5T AWD (2.5L L5 Turbo B5254T2)
• 2006 Volvo S80: 2.5T, 2.5T AWD (2.5L L5 Turbo B5254T2)

The Volvo Precision Standard

European engine management demands strict resistance tolerances to prevent false misfire monitoring faults. These replacement assemblies match OEM electrical resistance parameters, ensuring seamless communication with the Bosch ME7 ECU without triggering check engine lights.