move plus 97 will not start

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a very proud owner of this vehicle for the last 7 years
TILL NOW,sails through the M.o.T'S EVERY YEAR,but now it
fails to want to start, dash board lights all fine,no
dimming when key turned,and no action fromt the starter

diahatsu want 126.00 for inhibiter switch,help..........

can i bypasss it ..............anyone help