{"product_id":"ignition-coil-and-iridium-spark-plugs-for-audi-a3-1998-2004-1-8l","title":"Ignition Coil and Iridium Spark Plugs for Audi A3 (1998-2004) 1.8L","description":"\u003ch2\u003eDirect-Fit Ignition Coil and Iridium Spark Plug Kit for 1998-2004 Audi A3\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrimary Function:\u003c\/strong\u003e Restores factory secondary ignition voltage and combustion efficiency across all cylinders to eliminate misfires, hard cold starts, and erratic idling.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock A3 Secondary Ignition Degradation\u003c\/h3\u003e\n\u003cp\u003eThe 1.8L 20-valve engine in the 8L chassis experiences severe thermal cycling in the cylinder head plug wells. Factory ignition coils deteriorate over time due to epoxy insulation breakdown, internal copper winding fatigue, and thermal stress on internal transistors. Concurrently, standard nickel or platinum spark plugs suffer rapid electrode erosion and gap widening under continuous boost and heat, creating excessive electrical resistance. This causes spark blowout, unburnt fuel wash, fouled catalytic converters, and intermittent multi-cylinder misfire fault codes (P0300-P0304).\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis ignition kit supplies high-dielectric coil-on-plug assemblies engineered with high-density internal copper windings and reinforced boots to resist dielectric breakdown under extreme thermal loads. Paired with ultra-fine-wire iridium-tipped center electrodes and nickel-alloy ground electrodes, the system requires lower firing voltage while producing a concentrated, stable spark kernel. Direct-fit blade terminals and OEM-spec electrical connectors ensure seamless signal communication with the Motronic ECU without signal attenuation or resistance spikes.\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;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e1998-2004 Audi A3 1.8L (4-Cylinder)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eEA113 1.8L 20V \/ Type 8L\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e125-150 hp \/ 125-155 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eUF411, 06A905115\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1998-2004 Audi A3 (8L Chassis) 1.8L Inline-4\u003c\/li\u003e\n  \u003cli\u003eDirect interchange with OEM reference numbers: UF411, 06A905115\u003c\/li\u003e\n  \u003cli\u003eIncludes 4 coil-on-plug assemblies and 4 iridium spark plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Audi Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to meet stringent European engine management parameters, this ignition overhaul ensures factory dwell compliance and zero CEL triggers, maintaining the precise spark timing and smooth power delivery expected of German engineering.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50452877541624,"sku":"DS-EHYEYHZ4H","price":100.95,"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-audi-a3-1998-2004-1-8l-1.jpg?v=1788724112","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-and-iridium-spark-plugs-for-audi-a3-1998-2004-1-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}