Walker 921-2237 Ignition Coil

Walker ThunderSpark Ignition Coil for Subaru

Walker ThunderSpark ignition coil Part Number 921-2237 is a direct-fit ignition coil for select Subaru Legacy, Outback, and Tribeca applications. It is listed for 2010-2019 Subaru Legacy and Outback models, plus 2010-2014 Subaru Tribeca models, with fitment noted as single coil or ThunderSpark depending on application.

Key Features

• Ignition coil for Subaru Legacy, Subaru Outback, and Subaru Tribeca
• Walker ThunderSpark product line for ignition system service
• Fitment listed for 2010-2019 Subaru Legacy and Outback applications
• Fitment listed for 2010-2014 Subaru Tribeca applications
• Part Number 921-2237 for application matching and catalog lookup

Fitment Details

• Fits 2016-2019 Subaru Legacy, N/A, Single Coil
• Fits 2016-2019 Subaru Outback, N/A, Single Coil
• Fits 2010-2015 Subaru Legacy, N/A, ThunderSpark
• Fits 2010-2015 Subaru Outback, N/A, ThunderSpark
• Fits 2010-2014 Subaru Tribeca, N/A, ThunderSpark

What This Part Helps Address

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

Installation Notes

Verify the vehicle year, make, model, and ignition coil configuration before ordering. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. Confirm connector style and engine application against the existing coil before installation.

Quality Assurance

Walker ThunderSpark parts are cataloged for specific vehicle applications and identified by Part Number 921-2237 to support accurate replacement selection.