Ignition Coil and Iridium Spark Plugs for Cadillac DTS (2006-2011) 4.6L

Direct-Replacement Ignition Coil & Iridium Spark Plug Kit for 2006-2011 Cadillac DTS

Direct-Fit Ignition Overhaul: Replaces degraded factory coil packs and worn electrodes to eliminate high-load misfires, stabilize idle fluctuations, and restore balanced combustion across all eight cylinders.

The Stock DTS Thermal Breakdown

Transversely mounted in the GM G-body engine bay, the 4.6L Northstar V8 generates significant underhood thermal loads. Extended thermal cycling causes factory coil epoxy insulation to crack, leading to internal winding short-circuits and secondary voltage arcing. Concurrently, factory spark plugs suffer from gap widening and electrode erosion, drastically increasing the required ignition firing voltage and straining the primary ignition circuit.

The Engineering Solution

This 8-cylinder direct-replacement kit pairs 8 heavy-duty coil-on-plug units with 8 fine-wire iridium spark plugs. The ignition coils feature dense, high-grade internal copper windings and direct-fit blade terminals to guarantee rapid saturation and reliable high-voltage output. The paired iridium plugs feature corrosion-resistant center electrodes that lower firing voltage requirements, resist fouling, and ensure crisp throttle response under hard acceleration.

Technical Specifications

Compatibility

• 2006-2011 Cadillac DTS Base 4.6L V8
• 2006-2011 Cadillac DTS Luxury 4.6L V8
• 2006-2011 Cadillac DTS Premium 4.6L V8
• 2006-2011 Cadillac DTS Performance 4.6L V8
• 2006-2011 Cadillac DTS Livery / Hearse / Limousine 4.6L V8

The Cadillac Luxury Standard

Precision-matched to original factory signaling and dwell profiles, this complete ignition refresh restores the quiet, vibration-free power delivery and smooth low-RPM operation expected of premium American luxury sedans.