Ignition Coil and Iridium Spark Plugs for Cadillac CTS (2016-2019) 3.6L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2016-2019 Cadillac CTS 3.6L

What it Does: Restores factory secondary ignition voltage and combustion efficiency across all six cylinders to eliminate misfires, rough idle, and unburned fuel loss.

The Stock CTS Ignition Breakdown

In the tightly packaged engine bay of the Alpha-platform Cadillac CTS, the direct-injected 3.6L LGX V6 subjects factory ignition coils to severe thermal soak. Over time, heat cycles degrade the internal epoxy insulation and primary copper windings, inducing high-voltage dielectric breakdown and micro-arcing. Simultaneously, electrode erosion on worn spark plugs increases the required ignition firing voltage, stressing the coils and triggering hesitation, power loss, and P0300–P0306 misfire codes.

The Engineering Solution

This direct-replacement ignition service pack utilizes high-temperature silicone boots and premium copper primary/secondary windings to resist heat-induced resistance drift and carbon tracking. Paired with six fine-wire iridium spark plugs, the kit delivers lower voltage demand, rapid flame kernel development, and precise arc stability under elevated cylinder pressures, restoring factory throttle response and complete fuel combustion.

Technical Specifications

Compatibility

• 2016 Cadillac CTS 3.6L V6 (Base, Luxury, Performance, Premium)
• 2017 Cadillac CTS 3.6L V6 (Base, Luxury, Premium Luxury)
• 2018 Cadillac CTS 3.6L V6 (Base, Luxury, Premium Luxury)
• 2019 Cadillac CTS 3.6L V6 (Base, Luxury, Premium Luxury)

The Cadillac Precision Standard

Designed to integrate seamlessly with the GM E92 engine control unit, these ignition components ensure strict OE electrical impedance, reliable cold starts, and zero check-engine lights for refined luxury performance.