Ignition coil, also referred to as a "spark coil" or "spark plug coil," is a critical component in the electrical ignition system of your vehicle. The coil essentially converts the 12 volts from your battery to the thousands of volts necessary to allow for the spark plug to ignite the air / fuel mixture in the engine. The location and appearance of the engine?s ignition coil is dependent on what type of ignition system your vehicle uses, but they can usually be found near the spark plugs. The common causes of ignition coil failures are heat and age. An engine?s ignition coil can suffer a complete failure, resulting in no spark; or may become too weak to supply sufficient current to the plug to adequately ignite the air / fuel mixture in the engine which may result in poor performance and a misfire condition. In either case, the car engine?s ignition coil must be replaced. This Ignition Coil Pack Fits For the Following Vehicles: 2013 2014 2015 2016 2017 2018 2019 2020 Buick Encore 1.4L L4, 2014-2016 Cadillac ELR 1.4L L4, 2011-2015 Chevy Cruze 1.4L L4, 2016 Chevy Cruze Limited 1.4L L4, 2012-2020 Chevy Sonic 1.4L L4, 2015-2020 Chevy Trax 1.4L L4, 2011-2015 Chevy Volt 1.4L L4. Customers can find the product you need accurately according to the OE part number. Replacement Part Number: D521C, 25195107, 55577898, 55579072, 25198623, C1810, UF669, UF-669, C-1810, 19005362, 55573735, DMB1155, 610-00191, 55575499, ICA86973. Features: Direct Fit Replacement- Guaranteed to fit and function properly for your specific application. Optimum Performance - Meets or exceeds requirements of the vehicle. Provides the correct primary and secondary resistance, voltage output, and spark energy needed to restore original operating condition.