Walker 921-2104 Ignition Coil

Ignition Coil for Mazda Applications

Walker ThunderSpark ignition coil Part Number 921-2104 is a direct-fit ignition component for select Mazda vehicles. It supports consistent spark delivery for Mazda MX-5, Mazda MX-5 Miata, Mazda 3, Mazda 3 Sport, Mazda 6, and CX-7 applications listed below.

Key Features

• Ignition coil for OE-style replacement use
• Walker ThunderSpark product line
• Fits select Mazda MX-5 and Mazda MX-5 Miata models
• Fits select Mazda 3, Mazda 3 Sport, Mazda 6, and CX-7 models
• Part Number 921-2104 for application matching

Compatible Vehicle Fitment

• Fits 2007-2015 Mazda MX-5, N/A, Single Coil
• Fits 2015 Mazda MX-5 Miata, N/A, Single Coil
• Fits 2006-2014 Mazda MX-5 Miata, N/A, ThunderSpark
• Fits 2006-2013 Mazda 3, N/A, ThunderSpark
• Fits 2013 Mazda 3 Sport, N/A, Single Coil
• Fits 2010-2011 Mazda 3 Sport, N/A, Single Coil
• Fits 2006-2013 Mazda 6, N/A, ThunderSpark
• Fits 2012 Mazda 3 Sport, N/A, ThunderSpark
• Fits 2007-2012 Mazda CX-7, N/A, ThunderSpark
• Fits 2006 Mazda MX-5, N/A, ThunderSpark

Product Details

This ignition coil is used to replace a failing coil that can cause weak spark, misfires, rough idle, hard starting, and reduced engine performance. Walker ThunderSpark Part Number 921-2104 is listed for multiple Mazda platforms, including Mazda MX-5 Miata and Mazda 3 applications, making it a practical match when the original coil needs replacement.

Common Issues It Can Address

• Engine misfire codes
• Rough idle or hesitation
• Hard starting
• Loss of power under load
• Intermittent spark delivery

Installation Notes

Verify the year, model, and ThunderSpark or Single Coil note before ordering. Compare the original coil connector, mounting style, and engine application to confirm fitment for your Mazda MX-5, Mazda 3, Mazda 6, or CX-7. This part cross-references no listed part numbers in the provided data.

Quality Assurance

Walker ThunderSpark Part Number 921-2104 is cataloged as an ignition coil for the listed Mazda applications and should be matched to the vehicle fitment data above before installation.