Full product description

<h2>Direct-Replacement Ignition Coil & Spark Plugs for 2011-2013 BMW 5 Series</h2> <p><strong>Restoring optimal combustion and eliminating misfires:</strong> This comprehensive ignition service kit replaces degraded factory coils and fouled plugs to restore factory power delivery and smooth idling.</p> <h3>The Stock F10 Ignition Shortcomings</h3> <p>The N63 4.4L twin-turbo V8 engine is notoriously harsh on its ignition components due to extreme thermal loads generated by the 'hot-V' turbocharger layout. Intense under-hood heat bakes the factory ignition coil housings, causing micro-cracks in the epoxy potting. This degradation allows high voltage to arc directly to the cylinder head rather than bridging the spark plug gap, resulting in heavy-load hesitation, rough idling, and misfire codes. Additionally, standard spark plugs suffer electrode erosion under these high cylinder pressures, widening the gap and heavily straining the aging factory coils.</p> <h3>The Engineering Solution</h3> <p>This kit revitalizes the N63 ignition sequence, combining eight high-output coils with matched platinum spark plugs. The upgraded coils feature thermal-resistant silicone boots and high-dielectric epoxy resin to combat severe heat soak. Inside, tightly wound copper windings maximize voltage transfer to prevent spark blowout under high boost. The included platinum spark plugs utilize a durable fine-wire center electrode that resists high-temperature erosion. This promotes a highly concentrated spark kernel for efficient fuel combustion, restoring crisp throttle response, ensuring a perfectly stable idle, and delivering consistent ignition performance.</p> <h3>Technical Specifications</h3> <table width="100%" style="border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;"> <tbody> <tr style="background-color: #f9f9f9;"> <td style="padding: 8px;"><strong>Fitment</strong></td> <td style="padding: 8px;">2011-2013 BMW 5 Series</td> </tr> <tr> <td style="padding: 8px;"><strong>Engine / Chassis</strong></td> <td style="padding: 8px;">N63 4.4L V8 / F10</td> </tr> <tr style="background-color: #f9f9f9;"> <td style="padding: 8px;"><strong>Stock Output</strong></td> <td style="padding: 8px;">400 hp / 450 lb-ft (Approx)</td> </tr> <tr> <td style="padding: 8px;"><strong>Part Number</strong></td> <td style="padding: 8px;">12137523345, UF667, 2IGC0102, 921-2111, C1638VC, DS-<span>IC78056254087810ZR5TPP3308</span> </td> </tr> </tbody> </table> <h3>Compatibility</h3> <ul> <li>2011 BMW 550i 4.4L V8</li> <li>2012 BMW 550i 4.4L V8</li> <li>2013 BMW 550i 4.4L V8</li> <li>2011 BMW 550i xDrive 4.4L V8</li> <li>2012 BMW 550i xDrive 4.4L V8</li> <li>2013 BMW 550i xDrive 4.4L V8</li> </ul> <h3>The BMW Precision Standard</h3> <p>Engineered for precise module communication, these components ensure a perfect interface with the DME, delivering a stable spark profile and keeping your instrument cluster entirely free of Check Engine Lights.</p> <h3>Common Questions</h3> <p><strong>Will this ignition kit fit my 2011-2013 BMW 550i or 550i xDrive?</strong><br>Yes. This kit is a direct replacement for all 2011, 2012, and 2013 BMW 550i and 550i xDrive sedans equipped with the F10-chassis N63 4.4L twin-turbo V8 engine.</p> <p><strong>What is included in the box?</strong><br>The kit includes a complete V8 service set of eight high-output ignition coils and eight matched fine-wire platinum spark plugs.</p> <p><strong>Which BMW 5 Series models and engines is this kit built for?</strong><br>This kit is engineered specifically for the 2011-2013 BMW 550i and 550i xDrive with the 400 hp N63 4.4L V8.</p> <p><strong>Which factory part numbers does this kit replace?</strong><br>The ignition coils replace OEM and aftermarket numbers 12137523345, UF667, 2IGC0102, 921-2111, and C1638VC, paired with matched N63 platinum spark plugs.</p> <p><strong>Do these coils and plugs require any coding or tuning after installation?</strong><br>The coils and platinum spark plugs are direct