It was only $40 or so a few months ago at TPC, but that might have been with a sale. - Wallace '87 5kcstq 168k > The generic (Universal) BOSCH 3 wire Oxy sensor is [034 906 265CU]. It's about $60-70 (I think) from Rod at TPC. Sorry, dont know about the Mustang sensor or how it compares.