Walker 921-2240 Ignition Coil

Walker ThunderSpark Ignition Coil for Subaru

Walker ThunderSpark ignition coil Part Number 921-2240 is a direct-fit ignition coil for select Subaru applications. It is listed for 2004-2010 Subaru Forester, 2004-2010 Subaru Impreza, 2005-2009 Subaru Legacy, 2005-2009 Subaru Outback, 2004-2006 Subaru Baja, and 2011 Subaru Impreza, giving buyers a fitment-specific replacement option for common Subaru ignition service needs.

Key Features

• Walker ThunderSpark ignition coil for Subaru ignition system repair
• Part Number 921-2240 for fitment-based ordering and catalog lookup
• Compatible With 2004-2010 Subaru Forester, N/A
• Compatible With 2004-2010 Subaru Impreza, N/A
• Compatible With 2005-2009 Subaru Legacy, N/A
• Compatible With 2005-2009 Subaru Outback, N/A
• Compatible With 2004-2006 Subaru Baja, N/A
• Compatible With 2011 Subaru Impreza, N/A

Detailed Description

The Walker ThunderSpark line focuses on ignition components for vehicle-specific service applications. This ignition coil, Part Number 921-2240, is cataloged for Subaru models across the 2004-2011 range, including Subaru Impreza, Subaru Forester, Subaru Legacy, Subaru Outback, and Subaru Baja. Use it when replacing a failing coil in a Subaru ignition system and when you need a part matched to the listed vehicle fitment.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Engine misfire related to weak ignition output
• Rough idle caused by inconsistent spark delivery
• Hard starting tied to ignition coil failure
• Loss of power under load from degraded coil performance
• Check engine light conditions associated with ignition faults

Installation Notes and Tips

Verify the year, make, model, and engine application against the vehicle before installation. Confirm connector style, mounting location, and existing coil configuration match the listed Subaru fitment. For best results, inspect spark plugs and related ignition components during service, since worn plugs can contribute to coil stress and repeat failures.

Quality Assurance

Walker ThunderSpark parts are cataloged as application-specific ignition components for service replacement. Part Number 921-2240 is listed for the Subaru applications shown above, supporting accurate fitment selection for ignition coil replacement.