{"product_id":"ignition-coil-and-iridium-spark-plugs-for-bmw-5-series-2003-2009-2-5l","title":"Ignition Coil and Iridium Spark Plugs for BMW 5 Series (2003-2009) 2.5L","description":"\u003ch2\u003eDirect-Fit Ignition Coil and Iridium Spark Plug Kit for 2003-2009 BMW 5 Series\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eDirect-Replacement Ignition Overhaul:\u003c\/strong\u003e Replaces degraded factory coil packs and fouled spark plugs to restore high-voltage arc stability, eliminate secondary ignition misfires, and stabilize idle across all six cylinders.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock 5 Series Thermal Fatigue and Dielectric Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe inline-six engine bay in the E60 platform subjects factory ignition coils to severe thermal soak, particularly under the sound deadening and acoustic engine covers. Over time, original coil-on-plug boots develop micro-fissures in the silicone, permitting dielectric breakdown and spark flashover under load. Simultaneously, aged spark plug electrodes experience gap erosion, elevating the required firing voltage and overstressing internal primary\/secondary windings, triggering rough idle and DME misfire trouble codes (P0300–P0306).\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis 6-cylinder refresh kit pairs six heavy-duty ignition coils featuring high-purity copper windings with six fine-wire iridium spark plugs. The coils utilize reinforced thermoplastic housings and high-temp silicone boots to isolate voltage leaks up to extreme thermal thresholds. Laser-welded iridium center electrodes provide exceptional erosion resistance, maintaining precise gap geometry and consistent flame kernel propagation for efficient cylinder combustion.\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;\"\u003e2003-2009 BMW 5 Series (525i \/ 525xi)\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;\"\u003e2.5L M54B25 \/ N52B25 \/ E60\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\u003e2003-2009 BMW 5 Series 2.5L Inline-6 (525i, 525xi)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe BMW Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to meet factory DME resistance and dwell-time parameters, this ignition kit guarantees seamless plug-and-play operation with no check engine lights, delivering the smooth throttle response and refined operation expected from European engineering.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50451974914296,"sku":"DS-EEFDDTE2D","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-5-series-2003-2009-2-5l-1.jpg?v=1788715826","url":"https:\/\/performancechiptuning.com\/es\/products\/ignition-coil-and-iridium-spark-plugs-for-bmw-5-series-2003-2009-2-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}