{"product_id":"ignition-coil-spark-plugs-for-audi-s5-2018-2021-2-9l","title":"Ignition Coil + Spark Plugs for Audi S5 (2018-2021) 2.9L","description":"\u003ch2\u003eDirect-Fit Ignition Coil and Spark Plug Kit for 2018-2021 Audi S5\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The complete ignition kit replaces worn factory secondary ignition hardware on the 2018-2021 Audi S5 to eliminate cylinder misfires, restore clean flame kernel propagation, and stabilize high-rpm spark delivery.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Audi S5 Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eFactory ignition coils on the \u003cstrong\u003eB9\u003c\/strong\u003e chassis endure intense thermal saturation inside the compact cylinder head valley of the \u003cstrong\u003eEA839\u003c\/strong\u003e engine. Over extended heat cycles, the internal copper windings and dielectric epoxy degrade, causing secondary current leakage and high-boost spark blowout. Simultaneously, factory spark plugs suffer ground electrode wear and ceramic insulator micro-fractures, which widens the plug gap, strains the coil drivers, and triggers diagnostic trouble codes like P0300 through P0306 under peak load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement kit includes six direct-fit coil-on-plug assemblies and six matched spark plugs engineered to withstand aggressive thermal profiles. The ignition coils utilize high-grade magnetic silicon steel cores and reinforced thermoplastic housings to resist dielectric breakdown and maintain secondary voltage stability across the rev band. Paired with fine-wire center electrode spark plugs, the kit reduces the required ionization voltage, optimizes quench resistance, and ensures complete combustion without modification to the factory wiring harness.\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;\"\u003e2018-2021 Audi S5\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;\"\u003e\n\u003cstrong\u003eEA839\u003c\/strong\u003e (2.9L Twin-Turbo V6) \/ \u003cstrong\u003eB9\u003c\/strong\u003e\n\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;\"\u003e444 hp \/ 443 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;\"\u003e\n\u003cstrong\u003eUF793\u003c\/strong\u003e, \u003cstrong\u003e93560\u003c\/strong\u003e, \u003cstrong\u003e06H 905 110\u003c\/strong\u003e, \u003cstrong\u003e06K\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2018 Audi S5 2.9L V6\u003c\/li\u003e\n  \u003cli\u003e2019 Audi S5 2.9L V6\u003c\/li\u003e\n  \u003cli\u003e2020 Audi S5 2.9L V6\u003c\/li\u003e\n  \u003cli\u003e2021 Audi S5 2.9L V6\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the B9 S5?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2018-2021 Audi S5 equipped with the \u003cstrong\u003eEA839\u003c\/strong\u003e 2.9L engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShould spark plug gap clearance be verified prior to installation?\u003c\/strong\u003e\u003cbr\u003e Yes, verify gap clearance with a feeler gauge to factory service manual tolerances prior to torquing to prevent electrode binding.\u003c\/p\u003e\n\n\u003ch3\u003eThe Audi Precision Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered to meet stringent European performance tolerances, this ignition system upgrade maintains precise ECU timing control, ensures smooth idle stability, and guarantees a zero-CEL running condition under demanding driving conditions.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50622917148920,"sku":"DS-E66CQTJEH","price":170.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plugs-for-audi-s5-2018-2021-2-9l-1.jpg?v=1790276811","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-spark-plugs-for-audi-s5-2018-2021-2-9l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}