{"product_id":"ignition-coil-and-iridium-spark-plugs-for-bmw-3-series-2003-2011-2-5l","title":"Ignition Coil and Iridium Spark Plugs for BMW 3 Series (2003-2011) 2.5L","description":"\u003ch2\u003eDirect-Fit Ignition Coil \u0026amp; Iridium Spark Plug Kit for 2003-2011 BMW 3 Series\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e Replaces degraded factory coil packs and worn plugs to eliminate multi-cylinder misfires, stabilize idle, and restore crisp combustion across the entire rev range.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock 3 Series Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003ePositioned beneath tightly sealed engine acoustic covers, the factory ignition coils on BMW 2.5L inline-six engines suffer from extreme thermal soak. Continuous high-heat cycling degrades the internal potting epoxy and winding insulation, leading to secondary voltage breakdown, high-RPM misfires, and DME trouble codes (P0300–P0306). Additionally, standard spark plug electrodes erode over time, increasing the ignition gap and placing excessive electrical strain on the coils.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement kit provides six high-output coil-on-plug assemblies and six fine-wire iridium spark plugs engineered to withstand aggressive combustion temperatures. Built with high-purity internal copper windings, durable dielectric resin, and corrosion-resistant blade terminals, the coils ensure maximum spark transfer without arcing. The matched iridium plugs offer superior thermal stability and require lower firing voltage, maintaining a precise spark gap for clean flame propagation and dependable throttle response.\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;\"\u003e2003-2011 BMW 3 Series 2.5L\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;\"\u003eM54B25, N52B25 \/ E46, E90, E91, E92\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;\"\u003e184–215 hp \/ 175–185 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;\"\u003eUF515, UF-515, UF522, UF-522\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2003-2006 BMW 325i \/ 325Ci \/ 325xi (E46) 2.5L Inline-6\u003c\/li\u003e\n  \u003cli\u003e2006-2011 BMW 323i \/ 325i (E90 \/ E91 \/ E92 \/ E93) 2.5L Inline-6\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe BMW Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to meet stringent European DME electrical tolerances, this complete ignition overhaul kit provides seamless plug-and-play installation, direct factory terminal mating, and zero check-engine lights.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50451973210360,"sku":"DS-EIIXU44SJ","price":101.95,"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-bmw-3-series-2003-2011-2-5l-1.jpg?v=1788715471","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-and-iridium-spark-plugs-for-bmw-3-series-2003-2011-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}