Who has cheap 740 O2 sensor?

Question

Its for my 92 740 turbo wagon. After changing the air mass meter, the gas mileage went up to normal for a couple of weeks, and then plummeted again. Needs another new part. Rock Auto has a Bosch sensor for $99. But I seem to remember a few months ago someone in this forum told me of a source for one that is only around $ 60. The car is setting a code for "adaptive lambda either too rich or too lean at part load". It is 3-wire , heated type.

John Horner · Accepted Answer

There are "universal" sensors sold for around $60 which require splicing instead of being a direct plug in. I've not had the best of luck with those splices and would spend the extra $40 (about one tank of fuel!) to get a direct connect type.

geronimo · Answer

Part of my job as an avionics tech is making high-reliablilitysplices, so I have no qualms about  tackling automotive splices.  Itsthe mechanic stuff I am often not so hot with  ;-) Regards, Geronimo.

JM Albuquerque · Answer

"geronimo"  escreveu na mensagem news:       Test your lambda first, because the most certain isthat the problem should be elsewhere.You need a multimeter and a gas flame and some instructionsthat you can find in the web, like I did some years ago.

geronimo · Answer

Yea, I probably should look at the connector first...its is insuch a high-heat area, and the car is so old.....still the O2 sensorhas probably not been changed well in excess of 60K miles, I suspect.I was looking at a NTK brand universal replacement. THe salesman onthe  i-net whom  I chatted with said it is not a good idea to get auniversal (no connector) as I will "never get a good enoughconnection, and the reading will be inaccurate".  What does tehaverage mechanic do? Crimp a plain butt splice on?       He may be right...but it depends on how long the wires are a lot,the splices will get hot as an oven if the wires are only a few incheslong! Possibly it would get so hot with the splices near the sensorthat even a normally high reliability splice like a solder-splice with(high-temp fusion wrap) would melt or weaken.    I can pay $65 for a NTK universal, or for *$100 MORE* get the verysame thing with a connector! Thats' insane.

Who has cheap 740 O2 sensor?

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