Walker 921-2347 Ignition Coil

Overview

Walker ThunderSpark ignition coil part number 921-2347 is a direct replacement ignition component for a wide range of BMW and Mini applications. It is listed for single-coil use and covers many turbocharged and hybrid models across multiple model years.

Compatible With BMW 228i Gran Coupe, 228i xDrive Gran Coupe, 230i, 230i xDrive, 330e, 330e xDrive, 330i, 330i xDrive, 430i, 430i Gran Coupe, 430i xDrive, 430i xDrive Gran Coupe, 840i, 840i Gran Coupe, 840i xDrive, 840i xDrive Gran Coupe, M2, M235i xDrive Gran Coupe, M240i, M240i xDrive, M3, M340i, M340i xDrive, M4, M440i, M440i Gran Coupe, M440i xDrive, M440i xDrive Gran Coupe, X3, X4, Z4, and select Mini Cooper, Cooper Clubman, and Cooper Countryman applications.

Key Features

• Walker ThunderSpark product line for ignition service applications
• Ignition coil replacement for single-coil configurations
• Coverage across BMW and Mini models from 2015-2024
• Part number 921-2347 for catalog and fitment lookup
• Supports a broad range of gasoline and hybrid vehicle applications

Detailed Description

Walker 921-2347 is an ignition coil built for vehicles that use a single-coil setup. The fitment data includes BMW 2 Series, 3 Series, 4 Series, 5 Series, 7 Series, 8 Series, X models, Z4, i8, and Mini Cooper family applications, with several entries tied to ThunderSpark-specific coverage. This makes it a practical replacement choice when servicing ignition misfire concerns on BMW and Mini platforms. The part number 921-2347 should be verified against the vehicle’s year, model, and fitment notes before ordering.

ThunderSpark is Walker’s ignition product line, used here for a broad range of BMW and Mini ignition coil applications. If you are sourcing a BMW 330i ignition coil, BMW M340i ignition coil, or Mini Cooper ignition coil, this part number 921-2347 appears in the listed fitment for multiple model years and configurations.

What It Is Used For

• Replacing a failed ignition coil that can trigger rough running
• Restoring spark delivery when the engine misfires under load
• Addressing hard-start or intermittent ignition performance issues
• Servicing ignition systems on BMW and Mini vehicles with single-coil fitment

Installation Notes and Tips

Confirm the exact year, model, and fitment note before installation, especially where the listing specifies ThunderSpark, Single Coil, or a production-date note such as From 06/2017. Match the part number 921-2347 to the vehicle application in the catalog before replacing the coil.

Quality Assurance

Walker ThunderSpark ignition coil 921-2347 is cataloged for specific BMW and Mini applications with application-level fitment data to support correct selection. Review the fitment notes carefully to ensure the listed ignition coil matches the vehicle configuration.