Has anyone noticed this? The older my car gets, 89 535i 5-speed, the fuel injectors seem to be getting noisier. The clicking noises they make are really getting loud. At first I thought it was that my valves were noisy and they needed to be adjusted, but they are fine. It is the actual electric fuel injector that is making yhe loud clicking noise. Two out of the six are really loud. Any comments, time to replace? or just an idiosyncracy of 12 year old electronic fuel injectors. By the way 100,000 miles on my car, does not burn oil nor does it leak anywhere.