Should All Four Ignition Coils Be Replaced Together?

[OSebastian]

It is recommended to replace all four ignition coils together. Generally, one ignition coil is responsible for one cylinder. If only one ignition coil fails while the others are functioning normally, emergency driving might be manageable, but it can be very detrimental to the engine, engine mounts, and connecting components. If another ignition coil fails, the vehicle may soon stall automatically. Therefore, it is best to promptly visit a repair shop for inspection. Below is additional information: 1. Identifying a Faulty Ignition Coil: Determining a faulty ignition coil is relatively straightforward. If the engine suddenly exhibits abnormal vibrations while driving (especially after covering a significant distance) accompanied by a noticeable loss of power, the issue may lie with the ignition coil. 2. Working Principle: When the primary coil is connected to a power source, a strong magnetic field is generated around it as the current increases, and the iron core stores this magnetic energy. When the switch device disconnects the primary coil circuit, the magnetic field of the primary coil rapidly decays, inducing a high voltage in the secondary coil.