Walker 921-2109 Ignition Coil

Walker ThunderSpark Ignition Coil

Walker ThunderSpark ignition coil Part Number 921-2109 is a direct-fit ignition coil for a wide range of GM and related vehicles. It is used on applications such as the Chevrolet Traverse, Buick Enclave, and Cadillac CTS to restore spark delivery and engine performance.

Key Features

• Walker ThunderSpark ignition coil for OE-style replacement service
• Fits select 2007-2024 Buick, Cadillac, Chevrolet, GMC, Pontiac, Saturn, Saab, and Suzuki applications
• Part Number 921-2109 for catalog and service identification
• Single-coil application coverage for listed vehicles
• Direct replacement format for ignition system repair

Fitment Coverage

• Fits 2021-2024 Buick Enclave, Single Coil
• Fits 2022-2024 Cadillac CT4, Single Coil
• Fits 2021-2023 Chevrolet Traverse, Single Coil
• Fits 2010-2020 Buick Enclave, ThunderSpark
• Fits 2008 Buick Enclave, ThunderSpark
• Fits 2012-2020 Chevrolet Impala, ThunderSpark
• Fits 2010-2020 Chevrolet Traverse, ThunderSpark
• Fits 2013-2019 Cadillac ATS, ThunderSpark
• Fits 2008-2019 Cadillac CTS, ThunderSpark
• Fits 2013-2019 Cadillac XTS, ThunderSpark
• Fits 2012-2017 Chevrolet Caprice, ThunderSpark
• Fits 2008-2017 Chevrolet Equinox, ThunderSpark
• Fits 2017 GMC Acadia Limited, ThunderSpark
• Fits 2010-2017 GMC Terrain, ThunderSpark
• Fits 2010-2016 Buick LaCrosse, ThunderSpark
• Fits 2007-2016 Cadillac SRX, ThunderSpark
• Fits 2015-2016 Chevrolet Colorado, ThunderSpark
• Fits 2014-2016 Chevrolet Impala Limited, ThunderSpark
• Fits 2010-2016 GMC Acadia, ThunderSpark
• Fits 2007-2008 GMC Acadia, ThunderSpark
• Fits 2015-2016 GMC Canyon, ThunderSpark
• Fits 2010-2015 Chevrolet Camaro, ThunderSpark
• Fits 2013-2015 Chevrolet Captiva Sport, Single Coil
• Fits 2010 Chevrolet Captiva Sport, Single Coil
• Fits 2012 Chevrolet Captiva Sport, ThunderSpark
• Fits 2008-2009 Chevrolet Captiva Sport, ThunderSpark
• Fits 2008-2012 Chevrolet Malibu, ThunderSpark
• Fits 2010-2011 Cadillac STS, ThunderSpark
• Fits 2010-2011 Saab 9-5, ThunderSpark
• Fits 2010 Buick Allure, Single Coil
• Fits 2010 Saturn Outlook, ThunderSpark
• Fits 2007-2008 Saturn Outlook, ThunderSpark
• Fits 2008-2010 Saturn Vue, ThunderSpark
• Fits 2009-2010 Suzuki Grand Vitara, ThunderSpark
• Fits 2007-2009 Pontiac G6, ThunderSpark
• Fits 2008-2009 Pontiac G8, ThunderSpark
• Fits 2008-2009 Pontiac Torrent, ThunderSpark
• Fits 2007-2009 Saturn Aura, ThunderSpark
• Fits 2007-2009 Suzuki XL-7, ThunderSpark

Detailed Description

Walker ThunderSpark Part Number 921-2109 is an ignition coil replacement for vehicles that use a single-coil or ThunderSpark application listed in the fitment data. It serves as the ignition system component that transforms battery voltage into the high voltage needed to fire the spark plugs, supporting consistent combustion in engines found in models like the Buick Enclave, Chevrolet Traverse, and Cadillac CTS. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Repair Symptoms

• Engine misfire under load or at idle
• Rough running or uneven acceleration
• Hard starting caused by weak spark output
• Check engine light related to ignition performance
• Loss of power from a failing coil on the listed vehicle

Installation Notes

Verify the vehicle year, make, model, and ignition coil configuration before installation. Match the existing coil style to the listed fitment for the Chevrolet Traverse, Buick Enclave, Cadillac CTS, and other covered applications. Inspect spark plugs, boots, and related ignition components during service to help prevent repeat failures.

Quality Assurance

Walker ThunderSpark is the product line identified for this ignition coil application, and Part Number 921-2109 is cataloged for the listed fitments across 2007-2024 vehicles.