{"product_id":"ignition-coil-spark-plugs-for-audi-a4-a6-1998-2001-2-8l","title":"Ignition Coil + Spark Plugs for Audi A4 A6 (1998-2001) 2.8L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Replacement Ignition Coil and Spark Plug Kit for 1998-2001 Audi A4, A6 (B5\/C5)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil pack and spark plug kit replaces heat-stressed factory ignition components on 1998-2001 Audi A4 and A6 2.8L engines to eliminate misfires, restore lost combustion efficiency, and stabilize idle quality.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Audi A4, A6 Secondary Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe 2.8L 30-valve V6 utilizes a unified waste-spark coil assembly mounted near radiant cylinder head heat. Prolonged thermal cycling breaks down the internal potting resin and winding insulation inside the factory assembly. As internal resistance climbs, secondary voltage drops, causing dielectric breakdown, micro-arcing, and hairline casing fractures. Paired with aged spark plugs presenting enlarged gaps, this breakdown triggers persistent random misfires (P0300 through P0306), rough idle, and unburned hydrocarbon wash into the catalytic converters.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement ignition package addresses coil fatigue by providing a complete refresh of the high-tension circuit. The waste-spark pack features high-impact, heat-resistant thermoplastic housing and premium copper secondary windings vacuum-impregnated with dense epoxy resin to prevent dielectric breakdown under full engine load. Paired with six matched, pre-gapped spark plugs with corrosion-resistant terminal studs, this kit delivers consistent spark energy across all six cylinders and eliminates voltage drop without demanding wiring modifications.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100% style=\" border-collapse: collapse border: solid font-size: min-width:\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;\"\u003e1998-2001 Audi A4, A6\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\u003eAHA \/ ATQ (EA835)\u003c\/strong\u003e \/ \u003cstrong\u003eB5, C5\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;\"\u003e190 hp \/ 207 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\u003eUF256\u003c\/strong\u003e, \u003cstrong\u003eC1171\u003c\/strong\u003e, \u003cstrong\u003eC-684\u003c\/strong\u003e, \u003cstrong\u003eIC381\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1998-2001 Audi A4 2.8L V6 (Chassis: \u003cstrong\u003eB5\u003c\/strong\u003e)\u003c\/li\u003e\n  \u003cli\u003e1998-2001 Audi A4 Quattro 2.8L V6 (Chassis: \u003cstrong\u003eB5\u003c\/strong\u003e)\u003c\/li\u003e\n  \u003cli\u003e1998-2001 Audi A6 2.8L V6 (Chassis: \u003cstrong\u003eC5\u003c\/strong\u003e)\u003c\/li\u003e\n  \u003cli\u003e1998-2001 Audi A6 Quattro 2.8L V6 (Chassis: \u003cstrong\u003eC5\u003c\/strong\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the B5 and C5 A4, A6?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1998-2001 Audi A4 and A6 equipped with the 2.8L 30V \u003cstrong\u003eAHA\u003c\/strong\u003e and \u003cstrong\u003eATQ\u003c\/strong\u003e engine codes.\u003c\/p\u003e\n\n\u003ch4\u003eDoes this kit include spark plug wires?\u003c\/h4\u003e\n\u003cp\u003eNo, high-tension spark plug leads are sold separately; this kit contains the single waste-spark coil pack and six spark plugs.\u003c\/p\u003e\n\n\u003ch3\u003eThe Audi Precision Benchmark\u003c\/h3\u003e\n\u003cp\u003eEuropean Motronic engine management systems depend on exact resistance values to maintain clean emission parameters and accurate misfire detection. Installing matched ignition coils and spark plugs restores factory electrical thresholds, preventing check engine lights, protecting expensive catalytic converters, and maintaining factory timing advance curves.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67524630446328,"sku":"DS-ER31LFCGN","price":112.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plugs-for-audi-a4-a6-1998-2001-2-8l-1.jpg?v=1790460612","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-spark-plugs-for-audi-a4-a6-1998-2001-2-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}