Walker 921-2098 Ignition Coil

Walker ThunderSpark Ignition Coil

Walker ThunderSpark ignition coil Part Number 921-2098 is a direct-fit ignition coil for select BMW applications. It is built for BMW 550i, 650i, X5, 750i, 750Li, 760Li, Z4, M3, X3, 325Ci, 330Ci, 760i, 325i, 325xi, 330i, 330xi, 525i, 530i, 545i, 645Ci, 745i, 745Li, and Z3 models across the listed years.

The ThunderSpark line is Walker’s ignition-focused product line, covering replacement ignition components for BMW engines that need stable spark delivery and consistent coil performance. Part number 921-2098 is a practical choice when servicing misfire-related ignition concerns on BMW 325i, 330i, and X5 applications, as well as other listed BMW models.

Key Features

• Walker ThunderSpark ignition coil for select BMW vehicles
• Part Number: 921-2098
• Compatible With BMW 550i, 650i, X5, 750i, 750Li, 760Li, Z4, M3, X3, and more listed applications
• Supports ignition system repair on 2001-2010 BMW models
• Direct replacement format for service work on factory ignition systems

Vehicle Fitment

• Fits 2006-2010 BMW 550i, N/A
• Fits 2006-2010 BMW 650i, N/A
• Fits 2003-2009 BMW X5, N/A
• Fits 2006-2008 BMW 750i, N/A
• Fits 2006-2008 BMW 750Li, N/A
• Fits 2003-2008 BMW 760Li, N/A
• Fits 2003-2008 BMW Z4, N/A
• Fits 2003-2006 BMW 325Ci, N/A
• Fits 2003-2006 BMW 330Ci, N/A
• Fits 2004-2006 BMW 760i, N/A
• Fits 2001-2006 BMW M3, N/A
• Fits 2004-2006 BMW X3, N/A
• Fits 2003-2005 BMW 325i, N/A
• Fits 2003-2005 BMW 325xi, N/A
• Fits 2003-2005 BMW 330i, N/A
• Fits 2003-2005 BMW 330xi, N/A
• Fits 2003-2005 BMW 525i, N/A
• Fits 2003-2005 BMW 530i, N/A
• Fits 2004-2005 BMW 545i, N/A
• Fits 2004-2005 BMW 645Ci, N/A
• Fits 2002-2005 BMW 745i, N/A
• Fits 2002-2005 BMW 745Li, N/A
• Fits 2001-2002 BMW Z3, N/A

What It Helps Address

• Engine misfire diagnosis tied to a failing ignition coil
• Rough idle on BMW 325i, 330i, M3, and similar applications
• Hard starting caused by weak spark output
• Loss of power under load from inconsistent coil performance
• Check engine light concerns related to ignition system faults

Installation Notes

Verify the part number 921-2098 against the vehicle’s original coil before installation. Confirm year, model, and engine application for BMW 550i, X5, 750Li, and other listed vehicles, and inspect related ignition components during service.

Quality Assurance

Walker ThunderSpark is the ignition product line for replacement spark and coil components. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.