I replaced the stock pump with another of the same at 30,000 miles. When it was on the way out it was intermittent and would not throw a code. i took it to a dyno to try and diagnose the problem. We made three pulls in ten minutes and it woud not act up. It worked like it was suposed to. Agreivating! It later went out altogether. Cost $400.00 plus labor. I later found out about the Ford sst pump from the lightining/harley Davidson pick up and I just found out there was a better Johnson pump out there also. The ford pump looks like overkill if the heat exchangers stay stock size. It requires some fabrication to install.