O2 sensor choice??

[upallnight]

Originally Posted by BigBlack48is

I just have a hard time paying double for something that I KNOW is the same...

I can follow some directions and splice some wires to save myself $100


I guess I'm not the typical BMW owner

au contraire, you are the typical 3rd or 4th or 5th BMW owner. First Owner will never have to worry about repair cost because he is under the service plan. The second owner may be a CPO so he doesn't have to worry about repair cost also, but starting with the 3rd and there on forward all BMW owners have to worry about the cost of repair.

[BigBlack48is]

Originally Posted by upallnight

au contraire, you are the typical 3rd or 4th or 5th BMW owner. First Owner will never have to worry about repair cost because he is under the service plan. The second owner may be a CPO so he doesn't have to worry about repair cost also, but starting with the 3rd and there on forward all BMW owners have to worry about the cost of repair.

touche!

I love it

[upallnight]

If Torque indicates that the short and long term fuel trim is lean that means the engine is actually running rich, that is why the 02 is "Taking fuel away from the mixture". I would look at the Fuel Pressure regulator as a tear in the diaphragm will cause a rich condition (can't hold the vacuum).

[TiAgX5]

Originally Posted by upallnight

au contraire, you are the typical 3rd or 4th or 5th BMW owner. First Owner will never have to worry about repair cost because he is under the service plan. The second owner may be a CPO so he doesn't have to worry about repair cost also, but starting with the 3rd and there on forward all BMW owners have to worry about the cost of repair.

You can add the "drive it like it's stolen" (from sig) to the not typical of 1st or 2nd owner list.

[bcredliner]

Im jus a contree boy but dat maks no cents to me. lit me tel ya feller, firs chain I got frum dat Seers katlog. I was thinkin sinc it were frm Seers it tuffer dan rod kil possum, dam thing kep brakin. I stl got dat dar saw but its a dooze to git goin an it don cut good. I gits a good idear. I git on wit ona dem xtended fix it for nuttin deals but nottin brok dat them fellers pade fur. I got it kornerd now. I git me one frm that dar Wall mert in da city an tak it bak wen da cuttins dun an git a shinee nu one dat has mor stuf ta mes wit. Lik to do dat wit wivs but don hav dat mane kusins. Now dat maks cents.

Billy Bob 7

[BigBlack48is]

Originally Posted by upallnight

If Torque indicates that the short and long term fuel trim is lean that means the engine is actually running rich, that is why the 02 is "Taking fuel away from the mixture". I would look at the Fuel Pressure regulator as a tear in the diaphragm will cause a rich condition (can't hold the vacuum).

You don't understand.. it's not a fuel trim thing, torque is showing 0v from that specific O2 sensor and it doesn't change!

[upallnight]

Local auto parts store such as O'Reilly, Pep boys and Autozone carries parts for our truck. When I needed a new coil for the BM Trouble U on a Friday night because Torque indicated that I had a misfire with fuel shutoff I was able to buy a new coil for the truck at Autozone.

I order a"BMW" wheel sensor from a well know BMW supplier, however after waiting for a week to get the part, they sent the wrong part. Informed them that the part that they sent me didn't look like the wheel sensor in the car. They replied that according to their computer the parts was for my car. I went on line and found out that the part that they sent me was for a 2005 and later BMW. Brought that to their attention and returned the parts but I was out the shipping cost both way. Guess I should consider myself lucky that they didn't charge me a 15% restocking fee for their mistake. Went to my local O'Reilly and they have the correct part the next day, with a life time warranty on the part. Nothing wrong with buying from a local supplier as long as you get a guarantee on the part.

[THE VEIN]

Originally Posted by BigBlack48is

I am @ 100k miles on the clock... You would replace all 4 instead of just the one failing?

Change both pre cat o2 sensors now and change the post cat sensors when they go bad

[zonefive]

Bosch 15738 Oxygen Sensor, Universal Type Fitment : Amazon.com : Automotive

OE Brand. Fits your car.

[jgold47]

dont buy the universal type 02 sensors. The actual correct o2 sensors for our cars from Bosch are not that expensive to start with. You dont need OEM as BMW does not have a o2 sensor plant run by frauleins in bavaria. from what I could gather, there are really only 1 or 2 companies that make the sensors, and they sell them to OES who rebrand them. For example, I dont think Bosch actually makes the Bosch sensors they sell for our cars I think NTK does (or maybe thats for the e36?).

However, good rule of thumb, get Bosch or NTK.

as far as your code, its possible that the post cat sensors are bad, but likely the pre cat sensors are not operating correctly which in turn causes the post cat sensors to act up. For example on my e36 with 168K miles and likely the original o2 sensors, both pre/post were throwing codes. I replaced the fronts, cleared the codes and the rear's never tripped again. I also did a bunch of other work to the engine like replacing VCG, throttle, emissions stuff, etc.. so that may also have been part of the problem.

Also, on our cars, I think there is a relay for the o2 sensor heaters. Theoretically, that could go bad as well, but i would think it would manifest as errors on all 4 sensors.