my car[2001 PTC LE] is currently being serviced at pepboys because I had really bad service at a car dealership, and my car started overheating again 2 days before I took it to pepboys. I was shown a part which they called a "bypass tube" which was rusted and thusly was leaking water really bad. they then showed me the knock sensor was broken[either by the dealer or them] and wanted to charge me $72 for replacing this part as well. Later that day I researched both parts online and only found the knock sensor was only $40 and the... read full review »