dprantl

3-wire Bosch narrowband O2 sensors are all the SAME except for wire length and connector end. If you splice one properly, there will be no difference. You can get a mustang O2 sensor for ~$40 and change the connector. The key is doing the splicing properly, and don't solder the wires.

The only way you can replace a narrowband sensor with a wideband is if you use the wideband's narrowband simulation mode to send a narrowband signal to the LH ECU. There are various successes/failures using emulation, so usually a wideband sensor is installed in addition to a narrowband so you can have both.

Dan
'91 928GT S/C 475hp/460lb.ft

Landseer

Am using bosch universals, but only for cost reasons across the fleet.
With one or two cars, I'd be opting to stay "factory".

pjg

http://www.rockauto.com/catalog/rafr...&parttype=5132

APWI Part # AP347 Direct Fit; Before Converter (Upstream) (Only 2 Remaining) $48.79

Jerry Feather

Even though I searched this link for the 87 928 the listing for this part that is "only 2 remaining" comes up for the 86. Roger's post 15 above suggests that the 85/86 is different from the 87 and later. I wonder what is up with that?

Jerry Feather

SeanR

Different connectors.

I've also had too many doing goofy stuff when spliced in and am not a fan of doing it that way.

I did do it on Irish Legends car last weekend though, and as I explained to him, it is not the right way to do it and if it starts to run oddly, that will be the reason why.

Imo000

I have a single wire O2 on mine, from an '87 V6 Camaro. $40 at the locat parts store. Takes a little longer to warm up (30sec or so) after that it's as good as heated one. Had it on there for 6 years.

NoVector

Sean - Did you have any trouble with the sensor reaching your x-pipe? I'm not sure if my sensor is stock(?)

Jerry Feather

And don't solder the wires? This is another one that puzzles me. I am fond of solder and heat shrink.

pjg

Soldering will cause early sensor failure according to Bosch.

http://www.boschautoparts.com/Techni...allGDWEB09.pdf

Imo000

There is some wacked out theory on oxygen molecules traveling in the wire and soldering stops this, but I can't picture how this can be true.

PHIL928

The flow of oxygen through metal? Sounds like Einstein needs to revise a few more things.

SeanR

You have to re-route it. I pull it back through the hole in the heat shield and route it a bit better on the passenger side. If there is extra wire, tie it up away from the X-pipe. You don't want it melting the wires and shorting, you not only loose O2 functionality, but the fuel pump also.

dprantl

It doesn't make intuitive sense to me, but I have heard that O2 sensors need to have air flow through the wire sheaths and that soldering the wires and using heat-shrink tubing would "seal" the insulation from outside air. Bosch also says that soldering the wires will cause early O2 sensor failure. Is it really true? Who knows...

Dan
'91 928GT S/C 475hp/460lb.ft

dr bob

Mine's been soldered for 50k+ miles. Due for replacement soon just on mileage, but still works great.

I've read the Bosch warnings about soldering, but I think their reasoning is less than scientific. The much more likely reason is that there's no tolerance for a poor/cold joint. The connection must be --completely-- mechanically and electrically sound before solder is applied (should be for all soldered connections...)

jbrob007

Bruce, Ordered it a couple of days ago and has yet to come in... should be tomorrow. I'll try to remember to measure it before I install it

Thanks to everyone for the info. I decided to go with the stock part and call it a day I'll get around to installing it this weekend... if my better half doesnt have me off doing something else

Joel