{"product_id":"ignition-coil-and-iridium-spark-plugs-for-cadillac-xt4-2019-2023-2-0l","title":"Ignition Coil and Iridium Spark Plugs for Cadillac XT4 (2019-2023) 2.0L","description":"\u003ch2\u003eDirect-Fit High-Dielectric Ignition Coil and Iridium Spark Plug Kit for 2019-2023 Cadillac XT4\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The complete ignition service kit restores factory combustion efficiency, eliminates high-boost spark blowout, and resolves misfire codes on the 2019-2023 Cadillac XT4 2.0L Turbo.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Cadillac XT4 Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe forced-induction \u003cstrong\u003e2.0L LSY\u003c\/strong\u003e inline-four operates under elevated cylinder pressures and aggressive thermal cycles within the tightly packaged \u003cstrong\u003eE2XX\u003c\/strong\u003e engine bay. Over time, the factory pencil coils suffer internal dielectric insulation breakdown and primary\/secondary winding degradation. This deterioration causes excessive thermal resistance, weak spark discharge under boost, and micro-arcing. Simultaneously, OEM spark plugs experience center electrode erosion and gap enlargement, elevating required firing voltages beyond what fatigued coil packs can deliver. The resulting symptoms present as rough idle shudder, intermittent high-load hesitation, reduced fuel economy, and persistent P0300 through P0304 misfire diagnostic trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive refresh kit pairs precision-wound direct-ignition pencil coils with fine-wire iridium core spark plugs engineered specifically for the direct-injected \u003cstrong\u003eLSY\u003c\/strong\u003e architecture. The coils utilize premium thermoplastic PBT housings filled with high-purity vacuum-poured epoxy to prevent internal flashover and resist thermal saturation under sustained load. Matched with high-conductivity copper cores and laser-welded iridium electrode tips, this kit maintains a stable flame front across the factory 258 lb-ft torque band. The fine-wire iridium configuration lowers voltage demand while improving anti-fouling capabilities, resisting carbon tracking, and ensuring crisp throttle response throughout daily commuter cycles and sustained highway load.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2019-2023 Cadillac XT4\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003e2.0L LSY Turbo I4\u003c\/strong\u003e \/ \u003cstrong\u003eE2XX\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e237 hp \/ 258 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003e55515866\u003c\/strong\u003e, \u003cstrong\u003eUF914\u003c\/strong\u003e, \u003cstrong\u003eGN11100\u003c\/strong\u003e, \u003cstrong\u003e12725605\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2019 Cadillac XT4 (Luxury, Premium Luxury, Sport 2.0L LSY Turbo)\u003c\/li\u003e\n  \u003cli\u003e2020 Cadillac XT4 (Luxury, Premium Luxury, Sport 2.0L LSY Turbo)\u003c\/li\u003e\n  \u003cli\u003e2021 Cadillac XT4 (Luxury, Premium Luxury, Sport 2.0L LSY Turbo)\u003c\/li\u003e\n  \u003cli\u003e2022 Cadillac XT4 (Luxury, Premium Luxury, Sport 2.0L LSY Turbo)\u003c\/li\u003e\n  \u003cli\u003e2023 Cadillac XT4 (Luxury, Premium Luxury, Sport 2.0L LSY Turbo)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the E2XX XT4?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2019-2023 Cadillac XT4 equipped with the \u003cstrong\u003e2.0L LSY\u003c\/strong\u003e engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the spark plugs pre-gapped for direct-injection boost levels?\u003c\/strong\u003e\u003cbr\u003e Yes, the iridium plugs come pre-gapped to factory GM specifications, though verifying clearance before installation is always standard practice.\u003c\/p\u003e\n\n\u003ch3\u003eThe Cadillac Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to satisfy luxury crossover tolerances, these direct-replacement ignition components preserve refined powertrain operation without triggering false-positive knock detection or erratic misfire DTCs.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50594310553848,"sku":"DS-EQTBFYAUV","price":104.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-and-iridium-spark-plugs-for-cadillac-xt4-2019-2023-2-0l-1.jpg?v=1790058733","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-and-iridium-spark-plugs-for-cadillac-xt4-2019-2023-2-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}