<h2>Direct-Fit Ignition Coil and Iridium Spark Plug Service Kit for 2003-2016 BMW 5 Series</h2> <p><strong>Primary Function:</strong> Restores factory secondary ignition performance and eliminates high-load misfires on 3.0L inline-six BMW powerplants with a synchronized six-cylinder coil-and-plug overhaul.</p> <h3>The Stock 5 Series Ignition Degradation</h3> <p>Factory coil packs on BMW straight-six engines endure intense cylinder head heat soak, degrading internal epoxy potting and causing thermal dielectric breakdown. Over time, micro-cracking in the primary and secondary copper windings results in erratic secondary voltage, unmetered resistance spikes, carbon tracking, and persistent cylinder misfires under boost or heavy acceleration.</p> <h3>The Engineering Solution</h3> <p>This comprehensive ignition service kit features high-grade internal copper windings and reinforced dielectric epoxy housings engineered to resist thermal degradation and electrical leakage. Paired with fine-wire iridium spark plugs offering superior thermal conductivity and low voltage requirement, the assembly is designed to ensure rapid flame kernel propagation, crisp throttle response, and stable combustion under extreme cylinder pressures.</p> <h3>Technical Specifications</h3> <table width="100%" style="border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;"> <tr style="background-color: #f9f9f9;"> <td style="padding:8px;"><strong>Fitment</strong></td> <td style="padding:8px;">2003-2016 BMW 5 Series (3.0L L6)</td> </tr> <tr> <td style="padding:8px;"><strong>Engine / Chassis</strong></td> <td style="padding:8px;">N52, N54, N55, M54 / E60, E61, F10, F11</td> </tr> <tr style="background-color: #f9f9f9;"> <td style="padding:8px;"><strong>Stock Output</strong></td> <td style="padding:8px;">215–300 hp / 185–300 lb-ft (Approx)</td> </tr> <tr> <td style="padding:8px;"><strong>Part Number / Interchange</strong></td> <td style="padding:8px;">UF515, UF-515, UF522, UF-522</td> </tr> </table> <h3>Compatibility</h3> <ul> <li>2003-2010 BMW 5 Series (E60 / E61) 525i, 528i, 530i, 535i 3.0L L6</li> <li>2011-2016 BMW 5 Series (F10 / F11) 528i, 535i, 535i xDrive 3.0L L6</li> </ul> <h3>The BMW Precision Standard</h3> <p>Engineered to meet stringent European diagnostic parameters, this ignition kit maintains precise dwell times and ionic current sensing compatibility to prevent false CEL codes, ensuring velvety-smooth idle characteristics and maximum efficiency across the entire rev range.</p>