{"product_id":"ignition-coil-iridium-spark-plugs-for-bmw-840ci-1996-1997-4-4l-v8","title":"Ignition Coil \u0026 Iridium Spark Plugs for BMW 840Ci (1996-1997) 4.4L V8","description":"\u003ch2\u003eHigh-Performance Ignition Coil \u0026amp; Iridium Spark Plugs for 1996-1997 BMW 8 Series\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e Restores factory ignition sequence and combustion efficiency by replacing degraded OEM coils and worn plugs with upgraded high-dielectric epoxy coils and fine-wire iridium spark plugs.\u003c\/p\u003e\n\u003ch3\u003eThe Stock 8 Series Ignition Degradation\u003c\/h3\u003e\n\u003cp\u003eThe M62 4.4L V8 engine in the E31 chassis generates severe thermal loads. Over time, this intense heat cycling compromises the epoxy insulation of the factory ignition coils. Once the thermal barrier cracks, voltage leaks inevitably follow, resulting in weak spark delivery, rough idling, and under-load misfires. Furthermore, older factory-style spark plugs suffer from accelerated electrode erosion. This widens the spark gap, forcing the failing coils to work harder and compounding the M62's ignition failure loop.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis complete 16-piece ignition kit directly addresses the E31's thermal shortcomings. The replacement ignition coils feature upgraded copper wire windings encased in high-temperature dielectric epoxy resin, drastically reducing heat soak vulnerability and stopping voltage leakage. Paired with eight fine-wire iridium spark plugs, the system requires less voltage to fire while delivering a stronger spark front. The iridium alloy resists high-temperature erosion, ensuring consistent gap tolerances. This stabilizes the M62's idle, improves throttle response, and prevents unburned fuel from damaging catalytic converters.\u003c\/p\u003e\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;\"\u003e1996-1997 BMW 8 Series\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;\"\u003eM62 4.4L V8 \/ E31\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;\"\u003e282 hp \/ 310 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;\"\u003eUF300, UF354, 62B56, IC417, IC483, 12131703228, 12137599219\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1996 BMW 840Ci 4.4L V8\u003c\/li\u003e\n\u003cli\u003e1997 BMW 840Ci 4.4L V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe BMW Precision Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered to meet exact European mechanical tolerances, this ignition system upgrade guarantees a clean install with no erratic Check Engine Light (CEL) codes. Restoring your M62 V8 to peak operating condition ensures the smooth, linear power delivery expected from an autobahn-bred grand tourer.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50182588432632,"sku":"DS-ED6M7632H","price":159.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-for-bmw-840ci-1996-1997-4-4l-v8-1.jpg?v=1787086276","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-iridium-spark-plugs-for-bmw-840ci-1996-1997-4-4l-v8","provider":"Performance Chip Tuning","version":"1.0","type":"link"}