Would an oil cooler leak cause ignition coil to go bad?

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. If the oil cooler leak allowed oil to get onto any wiring or coil components, then yes - it could contribute to this failure. Oil degrades rubber and sometimes wiring insulation also. Oil can disrupt electrical components. It's all a guess and theory - but to answer your question, yes it is possible. However, coils and their related circuits can experience failures for other reasons as well. Any way you look at it, resolving the oil leak is a good idea -- besides fixing what you are experiencing now with the vehicle. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.