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Always crimp. In fact, the O2 sensor relies on a small amount of air (O2) passing down the wires in between the gaps in the individual copper strands to allow proper operation of the electrochemical cell. If you solder, flux may block off this path to the cell, and cause the O2 sensor to stop working. It will not be damaged, but will not operate correctly. ...


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It looks like based on this page http://www.ecatalytic.com/oxygen-sensor-education/oxygen-sensor-locations that I need an upstream right or rear sensor. The denso part number is 234-9012 and runs around $100. I've seen online that it's a p.i.t.a. to change out this sensor. I will do some checking into how to do a vacuum and exhaust leak check, etc. before ...


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I think your looking at the procedure for a rear o2s b1s1 is an AFR sensor and is mounted on the firewall side manifold. I'd also suggest you do or have some diagnostics done before you replace the sensor. AFR sensors are not cheap and you may find yourself throwing a few hundred dollars down the drain. Check fuel trims. Check for vacuum and exhaust ...



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