Hi! I have a Chevy Sonic 2015 model sedan. When the mechanic removed the ignition coil to replace the spark plugs I noticed that one of the coils had a brown coloration that somehow resembles the color of rust. Pls. see picture attached. Also, the coil has been detached from the body. The 3 other coils were ok. Unfortunately, the mechanic could not give me an answer to the cause of the coloration and disconnection. Could anybody have an opinion about this? Thanks!
