I had one on my 3door for 5 year and got one on my mk2 with a cossy in for 3 years done lots of track days never had a problem , don't know how this one failed ?will have a look at mine for piece of mind , by the way is there a bs stamp in the corner of the sump with a number on the gate box as the guy did this so he knew how had them , and was it zinc gold passvated ?