I got one in my series 2 and I have had it since new.Its ok and It works and always has ,properly.In addition to the sensors that everyone has been talkin about I think there is one in the tank which gives you your range reading.I also have a ford trouble shooting chart for when it goes pearshaped.If you want it let me know.Mine has been more accurate than the gauge.Its the mutts nuts.Dont understand why everyone slags them off?