If you’re reading this because you’re concerned that your ignition coil is failing, then you’ve come to the right place. Our mechanics have come together to provide you with the best explanation for why one or more of your ignition coils are failing and what you can do to resolve it. So, let’s dive into the purpose of your BMW’s ignition coil.
An ignition coil is the part of your engine which powers the spark plug. It’s connected to a distributor, which helps time the combustion of your engine’s cylinders. Timing in an engine is essential. Without the properly-timed spark created by a spark plug to an ignition coil, a cylinder will misfire. Misfires damage your engine and decrease the overall performance of your BMW.
There’s an ignition coil for each cylinder in your BMW. If one fails, then your Engine Control Module (ECM) will shut off power being routed from your distributor into the faulty ignition coil.
We want you to understand that faulty or failing ignition coils should be repaired as soon as possible. As time progresses, your engine will suffer from future misfires and overcompensation for the loss of power.
Because the opening of your BMW’s ignition coils are so close to the engine, heat and vibration can cause damage to the housing of the coil over time. Most BMW ignition coils last for more than 140,000 miles. If you frequently push your car’s performance, the lifespan of your coils can decrease significantly. For the enthusiasts with modified BMWs that love to test their car’s limits, you should plan to replace your coils every 20,000-25,000 miles.
Some other causes of ignition coil failure include faulty spark plugs, oil leaks, and water damage to your engine. A faulty spark plug may not conduct electricity properly. This could cause the coil housing to melt over time from the excess heat generated on the insulator side. Oil leaks will damage the connection between the coil and spark plug, lowering conductivity and in turn preventing a spark. Lastly, water damage will surely short the circuit created from the ignition coil to spark plug connection.
You may have already noticed some or more of these symptoms, which has brought you here to learn more about them. Even if you haven’t experienced ignition coil failure yet, you should always be mindful of the symptoms. Here are some signs of a failing ignition coil:
We advise you bring your BMW into our shop so we can give you the details of a proper inspection with our diagnostic tools. With some of the most certified technicians in Phoenix, AZ, Tanner Motors guarantees our skilled mechanics are ready to bring you the best service around. Call today to schedule a service.