Quote:
Originally Posted by andrewwynn
I drove 1000s of miles unaware my thermostat was broken. My mileage went up like 16% immediately. I could not figure out why my wife's nearly identical x5 got 23 highway and I got 20 on a good day.
The moronic non gauge for temp on the dash is one of the biggest fails for BMW right up with the self destructing door handle.
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When mine failed, the engine was struggling to get to 70 Deg rather than the normal 88 Deg. This change was very visible on the temp gauge - that's what gave it away.
On mine, the first white mark is 60 Deg and the centre is anywhere from 75-95 Deg with little variation over this range. If the petrol engine is more sensitive to temp changes I guess this is a problem....