The OEM fans will wear the brushes out prematurely due to the way they are designed to turn on and off. The brushes just wear down to the point where they no longer touch the armature. I have had them apart numerous times. The brushes use to be readily available but I have long since lost the details. That is because after I wired the fans to run all the time when the AC was on, they never went bad again. These fans are DC motor and they will run cooler and the brushes will last longer if they just stay running once they are started. I did this on three different DeLoreans I owned when I lived in Houston. In Houston I figure I had the AC on 11 months out of the year. On 2 5 speed cars the Temp needle never moved from the warmed-up position. On the auto, on really hot days (over 90 degrees), when I am really working the torque converter, I could see the needle move up some just into the fan run zone. I have driven in 100+ degree weather with the AC on at 75 mph and the needle stays in the run zone on the auto. In the 5 speed it did not seem to matter what the temp was, the needle never moved. That is with an OEM radiator. My point? The fans should be wired to run all the time with the AC on in my opinion. It is so much easier on the fan motors and the car runs cooler. Of course, you have to do relay thing. Don't leave that oem fan fail module in there, it is junk. BTW, John Hervey, www.specialtauto.com has the parts and rebuilds the OEM fans. Price seems good too. Harold McElraft - 3354