Understanding the appropriate procedure and diagnosis codes for a particular study question is an important part of analyzing Medicare data. These codes are very specific and can change from year to year as new codes are added and others are discontinued.
There is no wear-out factor in the coil itself other than thermal cycling and the damage it may cause. Boots and wires do age, resulting in reduced insulation value over time. The key to correct ignition system diagnosis is to understand the details of how the system you are working on really functions. PAGE:
Like in the human body, it's usually age or being overworked that causes a failure. If your spark plug wires have too much resistance in them or spark plugs are extremely worn out, it will cause the ignition system to work harder. When that happens, the lifespan of the ignition coil usually shortens.