Product Overview

The ignition coil, OEM number 12138643360, is fitted to BMW models powered by the B46, B48, B58, B58TU, and S58 engine families, covering the 2014-2025 production run across the 2 Series, 3 Series, 4 Series, 5 Series, X1, X2, X3, X4, X5, and M models including the M2, M3, and M4. Since this coil spans BMW's core 4-cylinder and 6-cylinder turbocharged engine lineup used across nearly every current BMW model line, it's a very high-turnover part number worth stocking in significant volume.

A worn or failing ignition coil typically shows up as an engine misfire, a check engine light, rough idle, or reduced power and fuel efficiency. GSK Auto manufactures this ignition coil to OEM specification at our Ningbo, China facility, with every unit tested before packing. We supply at wholesale volume with low MOQ and support private label packaging, with our team available to confirm fitment before shipping.

Replacement OEM Numbers

Cross-Reference OEM Number

12-13-8-643-360, Eldor R100S001

(Confirm against your VIN or chassis code before ordering — these are commonly listed cross-references for this application, not a guarantee of exact fitment for every variant.)

What Is an Ignition Coil?

Function: The ignition coil converts the vehicle's low-voltage electrical supply into the high-voltage charge needed to create a spark at the spark plug, igniting the air-fuel mixture in the combustion chamber.

Working Principle: The coil steps up battery voltage through electromagnetic induction, delivering a strong electrical pulse to the spark plug at precisely timed intervals. This coil-on-plug design uses one coil per cylinder, mounted directly over the spark plug.

Importance: On BMW's core turbocharged engine platform used across most current model lines, properly functioning ignition coils are essential for smooth engine operation, fuel efficiency, and preventing damage from unburned fuel.

Common Failures & Signs: Engine misfire, often felt as a stumble or hesitation under load. Illuminated check engine light with a misfire trouble code. Rough or uneven idle. Reduced power and fuel efficiency.

Key Features

OEM-standard fitment - matches factory mounting and electrical specification for the 12138643360 application.

Precision manufacturing - wound coil construction built for consistent high-voltage output.

Long service life - built to handle sustained daily-driving load.

Excellent fitment - direct plug-in replacement, no modification required.

Tested before shipment - every unit checked for proper output before packing.

Reliable performance - restores factory spark strength and smooth engine operation.

Benefits

Importers - covers ignition coil demand across nearly every current BMW model line from one part number.

Wholesalers - very high turnover given the breadth of BMW's B46/B48/B58 engine platform.

Repair Shops - tested unit reduces comeback risk on a common misfire repair.

Distributors - private label packaging available for building a branded catalog.

End Customers - restored smooth engine operation and fuel efficiency.

Packaging & Shipping

Standard export cartons. Customized packaging available for distributor branding. OEM-style and private label printing on request. Container loading handled directly, with mixed-SKU consolidation for smaller orders. Worldwide shipping to Europe, North America, South America, the Middle East, Africa, and Southeast Asia.

Why Choose GSK Auto

GSK Auto manufactures factory-direct, keeping pricing tied to production cost. This ignition coil is built to OEM specification and tested before packing. We support low MOQ, private label packaging, and worldwide shipping, with our technical team available to confirm fitment before you order.

Call to Action

Sourcing ignition coils for BMW B46, B48, B58, or S58-equipped models? Contact GSK Auto for a wholesale quote, catalog, or OEM/private label cooperation.