I went to the BMW dealership and they said that the Check Engine Light in on because the O2 Sensor is not functioning properly. Can someone tell me exactly what it means and I dont exactly have the money right now to replace it so is it a big deal if I dont replace, but if i have to does anyone know where I can get done cheap?
O2 Sensor
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hey..well my thing is never get parts from the stealership.thats rule #1..hehe to much for them..but PM me or somethin and i could help you help for parts numbers and u could get it somewhere else...well ill just pm u
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02 sensor isnt a cruitial fix. all it does is help regulate and calculate the amount of exhaust gas that is expelled. i believe the reading from the O2 sensor and the intake sensor calculates the amount of fuel to add. .the only problem your gonna face is that the car is gonna run rich , meaning that your gonna burn a lot of gas up. if you have the money fix it, but like i said you really dont need to. dont get it done at a dealership they are expensive , the part itself carries a heafty price to begin with. dont get stuck with a $80-100 an hour bill as well. see if you can do it yourself, they arent that hard to do. the only hard part is getting the damn thing out. if not . then take it to a trusted mechanic and watch what he does. he will be able to show you what to do in the future.
good luck
good luck
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umm thx mark for the explainin..i cant think today..lol
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wha kind of bmw u got?
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yr?
Ok, I was browsing the net and I found this website that will sell it and it seems like its cheap
I found two though, does anyone know which one I would use for my '97 BMW 740iL
Use the site below, and see which one I should order
http://catalog.autopartsgo.com/?make=BM&ye...=1995&x=23&y=23
I found two though, does anyone know which one I would use for my '97 BMW 740iL
Use the site below, and see which one I should order
http://catalog.autopartsgo.com/?make=BM&ye...=1995&x=23&y=23
STOP
The page you listed is for a 1995, which is OBD I.
E38 OBD I has two oxygen sensors, and are of different specs from what you need.
You have OBD II, which unfortunately has four oxygen sensors; it has two regulating lambda probes and two lambda monitor probes, for a total of 4. There is a way to test them and pinpoint which one you need, but I only have the Bentley for 3 series, not 7 series, so the readings would be different.
If you let it go, it is true that you will run rich and lower your MPG. But in the long run you can also damage your cat and cause backpressure issues.
If you are replacing one, chances are your mechanic may advise you to replace all four at once, although they charge for each one separately. Go figure.
Here are the OE part numbers. You need two of each, total of four:
11 78 1 247 406 (regulating lambda probe)
11 78 1 742 051 (lambda monitor probe)
Some vendors crosslist OE part numbers with their own stock numbers. Be sure you contact them and verify if these are the ones you need before clicking checkout.
STOP
The page you listed is for a 1995, which is OBD I.
E38 OBD I has two oxygen sensors, and are of different specs from what you need.
You have OBD II, which unfortunately has four oxygen sensors; it has two regulating lambda probes and two lambda monitor probes, for a total of 4. There is a way to test them and pinpoint which one you need, but I only have the Bentley for 3 series, not 7 series, so the readings would be different.
If you let it go, it is true that you will run rich and lower your MPG. But in the long run you can also damage your cat and cause backpressure issues.
If you are replacing one, chances are your mechanic may advise you to replace all four at once, although they charge for each one separately. Go figure.
Here are the OE part numbers. You need two of each, total of four:
11 78 1 247 406 (regulating lambda probe)
11 78 1 742 051 (lambda monitor probe)
Some vendors crosslist OE part numbers with their own stock numbers. Be sure you contact them and verify if these are the ones you need before clicking checkout. [/b][/quote]
Good call Bob..I remember you asking about the lambda sensor's over at the planet a while back..
I have a 93' 740i and I am trying to smog it in california and the garage told me that it need to have the O2 sensor replaced. Can I just remove it and burn the carbon off the sensor or use another method to clean it? Or do you think a new on is the call.
If an O2 sensor goes "Lazy" (doesn't cycle properly) or just up and dies it has to be replaced, especially if it's a post cat sensor...the post cat sensor is in charge of your air/fuel ratio, sure you may just run rich and burn up fuel, but also running rich can burn up your catalytic converter, which just upped how much you're going to pay to get the problem solved. It has nothing to do with cleaning the sensor at all...it's a replacement item...and if you do it yourself, be damm careful you dont crack the porcilin, or you will have to buy another one.
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