Cheaper O2 sensor source?

[MBXB]

You have to use the old connector using the 21027. They provide the connectors and insulating sheath, and directions. I figure I can cut n splice. Its a car, not the Space Shuttle. LOL

[DueyT]

fore and aft? sensors. I've got one on each side directly across from each other.

Scott, do you also have two behind the cats (one either side)?

I think it's time for the ramps to be put to good use now.

Jeff, it doesn't look too bad....I mean, I do have a DeWalt 5" grinder/cut off and a MIG welder!

....*news flash after checking ETK*...
(and still to be confirmed by putting the beast up on ramps)

540i/6's only have 2 x O2 sensors, OEM p/n 11 78 1 742 023

additionally, it appears that some 540iA's also have 2 x temp sensors aft of the cats, OEM p/n 11 78 1 722 763

...I tried clicking on the temp sensor (ETK item #22 in the exhaust group) and was given a large "car not equipped with that part" dialogue box.

I'll confirm this tonight and report back to you guys what the skit is with the O2 sensors....well at least for '95 540i/6's.

Cheers,
Duey

[Hallmark]

Apparently the O2 sensor is sensitive enough that a solder joint will change the electrical characteristics enough to give wrong readings. A crimped splice is the way to go and (if protected from moisture) will outperform a solder joint.

[Mr Project]

Crimped better?

You sure about that? 'Cause as a guy with an EE degree, that would be the first time I have ever heard that, and it sounds like someone is confused. I can't think of any situation in which a crimped joint would be electrically preferable to a properly-soldered one.

[Hallmark]

1) You don't induce extra resistance into the circuit (this has a lot to do with soldering technique).

2) In high vibration environments a soldered wire joint will fail well before a crimped splice. That is why crimped connectors are generally preferred in aircraft applications.

[Mr Project]

Maybe we're thinking of different crimps...I'm thinking of the garden-variety butt-splice connectors or even the side-by-side crimps. Both of those styles will generally introduce more resistance than a good solder connection, and will corrode and fail much faster because they are so much harder to protect(and usually such low-quality materials).

Vibration tolerance maybe I could see as an advantage, but again, only if the crimp was a lot higher quality than the ones I'm thinking of.

[scott540]

Scott, do you also have two behind the cats (one either side)?

I think it's time for the ramps to be put to good use now.

Jeff, it doesn't look too bad....I mean, I do have a DeWalt 5" grinder/cut off and a MIG welder!

....*news flash after checking ETK*...
(and still to be confirmed by putting the beast up on ramps)

540i/6's only have 2 x O2 sensors, OEM p/n 11 78 1 742 023

additionally, it appears that some 540iA's also have 2 x temp sensors aft of the cats, OEM p/n 11 78 1 722 763

...I tried clicking on the temp sensor (ETK item #22 in the exhaust group) and was given a large "car not equipped with that part" dialogue box.

I'll confirm this tonight and report back to you guys what the skit is with the O2 sensors....well at least for '95 540i/6's.

Cheers,
Duey

Yeah, just two. Look a lot easier to get at than what I've heard of the 6 cyl one. THere were some post a while about about having temp sensor on japanese market models. Tricky part will be just getting them off after years of soaking in midwest road salt .