The ignition coil for the 2013-2020 Buick Encore, Chevy Sonic 2011-2015, and Volt 1.4L L4 is a genuine part made in Germany. This coil is of the Coil on Plug (COP) type, designed for direct placement on the plug, ensuring optimal performance. It does not require an external resistor and is specifically manufactured for these vehicle models, with the OE/OEM part number 55577898 and the manufacturer part number D521C. This high-quality ignition coil is a reliable replacement to ensure smooth and efficient engine operation.