Hey Mike, I think 97 should have 2 oxy sensors, 1 before & 1 after cat, 96 has 1 on down pipe & 1 at rear of cat. NTK brand was original equip, supposed to have fastest response time. Should have said the other day you need a 195f thermostat too mate, if they run cooler than that they get thirsty. The front oxy sensor seems to be the main one computer reads as I forgot to plug my rear one back in after buggering around with exhaust (shoosh AG) no codes, didn't know till I was changing trans oil sometime later. Keep the basic maintainance up to it mate with good parts & they seem to just keep going. I reckon mine's the most reliable vehicle I 've ever had, hope your's is the same. Regards oldon.
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