Ignition Coil and Iridium Spark Plugs for Cadillac CT5 (2020-2022) 2.0L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2020-2022 Cadillac CT5

What it Does: The ignition coil and iridium spark plug kit restores secondary voltage saturation and stabilizes flame kernel formation on the 2020-2022 CT5 to resolve high-boost misfires and rough idling.

The Stock Cadillac CT5 Dielectric Breakdown & Electrode Erosion

Mounted tightly beneath the acoustic engine cover of the Alpha 2 platform, the factory coil-on-plug packs of the LSY 2.0L turbo are exposed to severe thermal soak. Over thousands of heat cycles, the internal epoxy shielding degrades, causing primary and secondary coil insulation failure, micro-arcing, and internal resistance drift. Simultaneously, the factory spark plug gap widens under continuous combustion chamber pressure producing 258 lb-ft of torque. This widening increases ionization voltage demands past the degraded coils' output threshold, triggering P0300 through P0304 diagnostic codes, spark blowout under load, sluggish turbo response, and unburned fuel contamination.

The Engineering Solution

This comprehensive service pack replaces degraded ignition hardware with high-grade pencil ignition coils and fine-wire iridium spark plugs engineered for forced-induction duty. The coils utilize vacuum-impregnated resin potting and high-dielectric PBT housings to withstand ambient heat and prevent electrical leakage. Paired with ultra-fine iridium center electrodes capable of enduring combustion temperatures exceeding 4,400°F, this combination reduces required firing voltage, provides razor-sharp spark discharge, and resists spark blow-by under boost. Direct replacement for OEM part numbers 55515866, 12725605, and UF914.

Technical Specifications

Compatibility

• 2020 Cadillac CT5 Luxury / Premium Luxury / Sport (2.0L L4 Turbo LSY)
• 2021 Cadillac CT5 Luxury / Premium Luxury / Sport (2.0L L4 Turbo LSY)
• 2022 Cadillac CT5 Luxury / Premium Luxury / Sport (2.0L L4 Turbo LSY)

Frequently Asked Questions

Does this fit the Alpha 2 CT5?
Yes, this is a direct fit for the 2020-2022 Cadillac CT5 equipped with the LSY 2.0L turbocharged engine.

Are the iridium spark plugs pre-gapped for this turbocharged application?
Yes, the plugs are pre-gapped to factory LSY specifications, though checking gap clearance with a coin gauge or feeler gauge before torque installation is always recommended.

The Cadillac Precision Standard

Engineered to meet OE electrical tolerances, this ignition refresh preserves the powertrain's refined cruising quietness, eliminates CEL misfire triggers, and ensures crisp boost transition across all drive modes.