4 Pcs Ignition Coil for 325I 325Ci 328I 330Ci 335I 0221504470

uses winding process techniques to control the length of wire between adjacent windings. That's important because more length results in greater voltage differences, which in turn create more pressure that could break down the insulation and wire coating.ignition coils are engineered to Equipment ignition coils are designed with proven materials, such as high quality wires and wire coating that resists the cracks, pin holes and imperfections that most often lead to failure issuesEpoxy vacuum techniques reduce air in the epoxy, because having fewer air increases the epoxy's insulation quality and reduces the chances of energy punch-through failurescoils are designed and endurance tested to resist the common stresses that cause failureColour:BlackMaterial:plasticPackage Contents:4*Ignition CoilOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.