Turner Motorsport B58 Ignition Coil Conversion Kit - Late N55

Like many BMWs of the same vintage, the turbocharged N55 platform is no stranger to ignition system problems. Notorious for causing misfires, reduced power, and rough idle, the factory pencil-style ignition coil is a known weak point. In addition to its reliability issues, the factory coil pack lacks the output required for supporting performance modifications and software upgrades. While many ignition upgrades boast increased spark energy and durability, all fall short of the venerable B58 ignition coil. After years spent researching and developing the ultimate solution for N55 ignition system issues, the team of enthusiasts at Turner Motorsport is proud to offer the last ignition upgrade you'll ever need—the B58 Ignition Coil Conversion Kit.

WHY UPGRADE?

B58 ignition coils provide up to 2.3 times more spark energy than OE N55 pencil-style ignition coils, effectively eliminating misfires even on high-performance setups. Whether your vehicle is heavily modified or completely stock, these ignition coils deliver unparalleled performance with zero downsides! For tuners, the Turner Motorsport kit also allows for precise adjustments to ignition dwell time through compatible tuning software (MHD, BM3, etc.), giving you complete control over your engine’s performance.

Turner's kit utilizes the factory mounting location and includes a proprietary boot design with a built-in 1k OHM resistor. Manufactured from durable 6061-T6 aluminum with a sleek black anodized finish, the included ignition coil brackets combine rugged durability with a premium aesthetic. Designed and optimized in-house using cutting-edge 3D scanning hardware and CAD software, these components ensure a perfect fit and clean, factory-like appearance. Unlike many aftermarket options, this resistor prevents electrical contact springs from burning out, ensuring long-term reliability. Installation is a breeze with a fully plug-and-play wiring harness—no modifications are needed. Simply bolt it on and enjoy improved ignition performance!

Eliminate misfires and unleash the full potential of your N55 with this industry-leading B58 ignition coil upgrade. Designed for easy installation and unparalleled reliability, it’s the ultimate plug-and-play solution for performance enthusiasts.

FEATURES:

• B58 ignition coils offer upwards of 2.3x more spark energy than the OE N55 pencil-style coil pack
• Eliminates common ignition system defects - no more chasing misfires or swapping around coil packs!
• The included brackets, wiring harness adapters, and proprietary boots make for an easy, plug-and-play installation
• No hardware modifications are required for installation
• Confirmed functionality with factory DME software

PART DESIGN:

• Bolt-on ignition coil brackets are manufactured from 6061-T6 aluminum and feature a black anodized coating for superior durability, ensuring a lasting finish
• Utilizes factory ignition coil mounting locations and corresponding hardware for easy installation
• Turner's proprietary rubber boot design incorporates the factory B58 1K OHM resistor, preventing the electrical contact failure commonly associated with other aftermarket kits
• Plug-and-play wiring harnesses feature durable heat-shrink sheathing, safeguarding each wire from exposure to heat
• Compact design allows for retaining the factory beauty cover and/or clearance with aftermarket top-mount turbocharger kits

KIT CONTENTS:

• Turner Motorsport B Series Ignition Coils for N54/N55 (6)
• Turner Motorsport B58 Ignition Coil Conversion Wiring Harnesses (6)
• Turner Motorsport B58 Ignition Coil Conversion Brackets (3)
• Optional Selections:
  • Spark Plugs: Bosch ZGR6STE2 (OEM), NGK 97506 (one step colder)
  • Spark Plug Socket: Schwaben 14mm 12pt Magnetic Socket, Schwaben 14mm 12pt Swivel Socket

INSTALLATION & SUPPORT:

• Need installation tips? Turner Motorsport has assembled a full, start-to-finish installation tutorial, including detailed removal instructions and high-definition images! See the Installation PDF under the "INSTALLATION" tab for more information.

Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.