{"product_id":"ignition-coil-spark-plugs-for-bmw-6-series-2004-2005-4-4l","title":"Ignition Coil + Spark Plugs for BMW 6 Series (2004-2005) 4.4L","description":"\u003ch2\u003eDirect-Fit Ignition Coil and Spark Plug Refresh Kit for 2004-2005 BMW 6 Series\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The complete ignition coil and spark plug kit restores secondary ignition voltage and combustion efficiency on the 2004-2005 BMW 6 Series to eliminate misfires, stabilize idle, and recover lost throttle response.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock BMW 6 Series Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eUnder the hood of the \u003cstrong\u003eE63\u003c\/strong\u003e coupe and \u003cstrong\u003eE64\u003c\/strong\u003e convertible, the naturally aspirated \u003cstrong\u003eN62B44\u003c\/strong\u003e V8 creates an intense thermal footprint within a densely packed cylinder head valley. Over thousands of heat cycles, factory pencil-style coils suffer internal dielectric insulation breakdown, micro-cracking across epoxy casings, and thermal fatigue in secondary windings. Degraded coils generate intermittent secondary voltage leaks, causing partial spark blowout, unburnt hydrocarbon build-up, carbon fouling on old plugs, and dreaded DME rough-running misfire codes (29CC through 29D4).\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive tune-up kit replaces all eight coil-on-plug units and matched spark plugs simultaneously to restore uniform flame propagation across every cylinder. The replacement coils feature high-temperature silicone elastomer boots that resist dielectric flashover and oil degradation, alongside heavy-duty copper wire windings engineered for sustained dwell-time resistance. Paired with precise, pre-gapped electrode spark plugs, this setup ensures consistent ionization across wide combustion-chamber pressure variances without taxing the driver circuitry in the engine DME.\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;\"\u003e2004-2005 BMW 6 Series\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;\"\u003eN62B44 4.4L V8 \/ E63, E64\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;\"\u003e325 hp \/ 330 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;\"\u003e12130148594, 12130390064, 12131712219, 0221504464, UF522, UF515\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2004 BMW 6 Series 645Ci 4.4L V8 Coupe (E63)\u003c\/li\u003e\n  \u003cli\u003e2004 BMW 6 Series 645Ci 4.4L V8 Convertible (E64)\u003c\/li\u003e\n  \u003cli\u003e2005 BMW 6 Series 645Ci 4.4L V8 Coupe (E63)\u003c\/li\u003e\n  \u003cli\u003e2005 BMW 6 Series 645Ci 4.4L V8 Convertible (E64)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the E63\/E64 6 Series?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2004-2005 BMW 6 Series equipped with the N62B44 engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShould I replace all eight ignition coils and spark plugs at the same time?\u003c\/strong\u003e\u003cbr\u003e Yes; replacing the entire set prevents uneven electrical load on the DME and stops secondary misfires from aging companion components.\u003c\/p\u003e\n\n\u003ch3\u003eThe BMW Precision Standard\u003c\/h3\u003e\n\u003cp\u003eEuropean management systems demand tightly calibrated primary and secondary ignition resistance to avoid rough-idle adaptation limits and check-engine illumination. This kit meets exact factory ignition tolerances to ensure smooth, CEL-free Valvetronic operation.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50623700992248,"sku":"DS-E5VWZGFMP","price":205.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plugs-for-bmw-6-series-2004-2005-4-4l-1.jpg?v=1790298125","url":"https:\/\/performancechiptuning.com\/es\/products\/ignition-coil-spark-plugs-for-bmw-6-series-2004-2005-4-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}