1991 325ix oxygen sensor
- Thread starter jt325i
- Start date
Really easy - just unplug it from the wiring harness, unscrew it from the exhaust downpipe, screw the new one in, and plug it back in. I just used an open-ended wrench for mine, but be aware that they can be very tightly frozen into the pipe, so be careful not to round off the hex on the sensor - if you round it off, you are screwed.
No you're not ![[;)]](/images/smilies/wink.png "Wink [;)]")
The e30's o2 sensor is the easiest O2 sensor I've ever changed...EVER. My E34's o2 sensor is on the top of the pipes about an inch from the cat, at an angle. Could barely fit the oxygen sensor tool up there even after dropping the exhaust from the rear. I rounded off the bolt (really crappy O2 sensor tool from pepboys)... so I ended up taking a wrench and ripping the sensor body to shreds (ceramic went flying everywhere). Then I used a rounded off bolt remover I got from sears. Worked great!!!!
Anyways, I doubt you'll have HUGE stuck-sensor problems. Just buy some PB Blaster (NOTHING works as well as pb blaster), spray it, let it soak, tap it with the wrench a few times, and it should come right out. It's not at a location that gets much rust anyways (as compared to everything else).
The e30's o2 sensor is the easiest O2 sensor I've ever changed...EVER. My E34's o2 sensor is on the top of the pipes about an inch from the cat, at an angle. Could barely fit the oxygen sensor tool up there even after dropping the exhaust from the rear. I rounded off the bolt (really crappy O2 sensor tool from pepboys)... so I ended up taking a wrench and ripping the sensor body to shreds (ceramic went flying everywhere). Then I used a rounded off bolt remover I got from sears. Worked great!!!!
Anyways, I doubt you'll have HUGE stuck-sensor problems. Just buy some PB Blaster (NOTHING works as well as pb blaster), spray it, let it soak, tap it with the wrench a few times, and it should come right out. It's not at a location that gets much rust anyways (as compared to everything else).
epj3 said:
No you're not
The e30's o2 sensor is the easiest O2 sensor I've ever changed...EVER. My E34's o2 sensor is on the top of the pipes about an inch from the cat, at an angle. Could barely fit the oxygen sensor tool up there even after dropping the exhaust from the rear. I rounded off the bolt (really crappy O2 sensor tool from pepboys)... so I ended up taking a wrench and ripping the sensor body to shreds (ceramic went flying everywhere). Then I used a rounded off bolt remover I got from sears. Worked great!!!!
Anyways, I doubt you'll have HUGE stuck-sensor problems. Just buy some PB Blaster (NOTHING works as well as pb blaster), spray it, let it soak, tap it with the wrench a few times, and it should come right out. It's not at a location that gets much rust anyways (as compared to everything else).
The e30's o2 sensor is the easiest O2 sensor I've ever changed...EVER. My E34's o2 sensor is on the top of the pipes about an inch from the cat, at an angle. Could barely fit the oxygen sensor tool up there even after dropping the exhaust from the rear. I rounded off the bolt (really crappy O2 sensor tool from pepboys)... so I ended up taking a wrench and ripping the sensor body to shreds (ceramic went flying everywhere). Then I used a rounded off bolt remover I got from sears. Worked great!!!!
Anyways, I doubt you'll have HUGE stuck-sensor problems. Just buy some PB Blaster (NOTHING works as well as pb blaster), spray it, let it soak, tap it with the wrench a few times, and it should come right out. It's not at a location that gets much rust anyways (as compared to everything else).
If you have to resort to the kind of lenghts you did to get the O2 sensor out, you run the risk of screwing up the threads in the pipe while backing the sensor out - then you could be screwed since you would end up with a sensor that will neither work nor come out of the pipe.