Q: How to Replace the Ignition Coil Unit for Dodge Nitro?
A: For 2.4L four-cylinder engines, remove the ignition coil unit, clean the outer case, check the coil primary and secondary resistance, and replace if necessary. For 3.7L V6 engines, remove the ignition coil(s), clean the outer case, check the coil primary and secondary resistance, and replace if necessary.