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you have to find out which o2 sensor you need first. when you find out which sensor by getting the code with an obdII scanner. it will say o2 sensor bank 1 sensor 1 or o2 sensor bank 1 sensor 2 (#1 is in the exhaust pipe closest to the header or exhaust manifold assy, #2 is also in the exhaust pipe but is after the catalytic converter) buy the correct part based on the code. replacing it once found is simple. remove the 2 12mm nuts that hold it in, slide it out of the pipe, remove the old gasket, and unplug the sensor from the harness. then replace the gasket, put the new sensor in where the old one came out, install and tighten the nuts, then plug it in. clear the codes with the scantool or by removing the negative battery terminal for a minute or so then replacing it, and you're all set

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โˆ™ 2005-10-25 01:18:13
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Q: How do you replace O2 sensor on 96 Toyota Previa?
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