Pencil coil insulation can heat-harden and crack, allowing secondary spark to short to ground. Symptoms include engine misfire - especially when cold or under load - a flashing check engine light, and diagnostic trouble codes. Manufacture Part Number: for # 0 221 504 470 / for Part # 12 13 7 594 937 Interchange Partnumber: 12 13 8 647 689 / 12 12 2 158 253, 0221504470 / 0 221 504 470 / 12137571643/ 00124 / 72906009101, / 12137594938/ 0 20360 / 133825 / 36 8059 Name:Ignition Coil Fitment: For 1 Series M 2011 E82,For 128i 2008-2013 E82; E88,For 320i E46; From 09/2002 production date to 2004,For 325Ci 2003-2006 E46,For 325i E46 / 2006 From 04/2006 production date,For 325xi 2003-2005 E46 / 2006 E90; From 04/2006 production date,For 328i 2007-2013,For 328i xDrive 2012-2014 F30,For 328xi 2007-2008,For 330Ci 2003-2006 E46,For 330i 2003-2005 E46 / 2006 E90; From 05/2006 production date For 330xi 2003-2005 E46 / 2006 E90; From 05/2006 production date,For 335i 2007-2011,For 335is 2011-2013,For