1988 Carrera 3.2 Euro - What O2 sensor?
 

I was about to get this O2 sensor for my 88 Euro Carrera 3.2 - this sensor has the single round connector:

https://www.ebay.co.uk/itm/185704923938

Then I spotted there's another one with a second or different connector:

https://www.ebay.co.uk/itm/172328749827

Anyone know which is correct or will fit?

My car is a backdate with currently no O2 sensor, so it's not possible to disconnect the existing one and take cues from that. And there are a selection of unconnected spare plugs in the engine bay.

This guy at Pelican Parts is very competent with Porsche items:

John Hunter x260 / jhunter@pelicanparts.com

Good luck.

I thought that euro carreras had a premuffler, no CAT and no O2 sensor?

Euro Carreras were available with and without cat.

My 1988 Euro 3.2 Carrera with cat (930/25 engine version) has that round circular O2 connector from your Ebay link, it connects in the left side in the engine bay, near the fuel filter.

I'd buy it from Amazon instead of Ebay however, might be a couple of €/$/£ more but they couldn't be easier about returns or warranties.

Thanks for that suggestion. I did search Pelican Parts first and I was really surprised to find nothing appeared in the search. I wouldn't have linked the eBay items if they did. I'll email John and let him know about the search issue. I'm in Europe which PP can't supply economically.

Thanks. My 88 is idling too rich with no sensor (fails emissions) so I'll try adding one.

where in Europe are you??You can buy stuff from Rosepassion
Ivan

Euro a nd USA models both spec the same O2 sensor, 965-606-126-01

Hi Ivan,

RP wants €115 for the sensor, you can buy a genuine Bosch for €65 from Amazon with free shipping. Plus they have a no questions asked 30 day return and 2 year warranty, good luck trying that with RP on an O2 sensor...

RP has a very good selection of parts and good prices on some things, but it sucks that they don't disclose what brand product you are getting (Pelican for example very openly states what is OEM, original Porsche, aftermarket and has different prices for each). And you can be sure that RP's return and warranty policy will never even come close to Amazon.

I buy from all of the above and they all have their pros and cons, but I'm definitely not willing to pay almost 2x for the same part, with worse shopping conditions.

So it usually pays off to shop around...

Cheers,
Lukas

You're running without a O2 sensor and have no CAT, really? If so, why?
And if you have a CAT but no O2, not good!

Also, you are aware that without the correct Motronic chip, the O2 system won't function by just adding a sensor, right?

I have euro Carrera no cat or oxy sensor ,not necessary to have .....for about 27 years now...

Ivan

It would help if you take picture of the connector ,you have this way we can help you better.Also i have asked where in Europa are you? I have some oxy sensors i can either lend you or sell you

Ivan

Looks like Amazon works for you..At Rose you can call Rafael(he speaks very well English) and request whatever brand you desire-most of the time i get what i need...
Yah, you are right about the brand showing would be nice,thou

Ivan

Totally agree with what Lukas says about RP.
I'm French, I live in France, RP is French, and I never buy from them. There must be a reason or two.

living in Belgium, I always buy via ALPO https://alpo.nl/ in the Netherlands

cool thing is that there are real people behind the mailbox, they actually answer with knowledge on their mind. If you are wondering about a specific item, they mail you the parts number and pictures first, so that you can indeed confirm. Had zero issues with them...

I also stopped ordering at RP because of the above remarks (you don't know what you gonna get)

all this said ..still.going to original post...i would like to see the picture of the connector OP has ..

Ivan

The car's lightweight and backdated sonyhere are unplugged sockets everywhere! But I think I've seen the round one.

Sent from my SM-G988B using Tapatalk

I like to know the objective of your search....you are saying you cannot pass the smog test .what country in Europa are you? I suggested i can lend you the oxy sensor but not knowing more is hard to tell.....have you test the car what are the results?
Do you have no cat or do you?

Ivan

Hi, that's a really kind offer, thank-you. Since I have a rich idle condition and no O2 sensor, I bought the one with the round plug anyway. Should be here by the weekend.

In UK our test for this year of car is a few percent CO at warm idle, and I'm getting one or two percent too high. I don't recall the exact numbers. Thankfully I have a very understanding tester but I don't want to take too many liberties with him.

I will check and post a pic of the plug in due course. I just haven't been back under the hood yet.

Sent from my SM-G988B using Tapatalk

Hopefully your 911 3.2 DME ECM has the following;
1. The discrete circuitry for an O2 function, not the 0-261-200-051 ECM.
2. The EPROM has the O2 microcode.

Unfortunately..even if would give you the oxy sensor for free you are in your big Island no longer in Europe..idiotic if you ask me- you would have to pay tax...
Anyway prior testing your 911 make sure you go for long hard drive to make the engine hot ,this way you have more chances to pass the test...if your number are not really way off too much..
Ivan

Right looks like I have the right one. I have a few disconnected connectors

https://uploads.tapatalk-cdn.com/202...740e234725.jpg

https://uploads.tapatalk-cdn.com/202...208a48a80f.jpg

This one looks close but I suspect it's cruise control

https://uploads.tapatalk-cdn.com/202...84491a1254.jpg

But judging by other pics and posts I've seen this plugged up one is the one. Two of the pins are shorted by the plug.

https://uploads.tapatalk-cdn.com/202...b47e54387b.jpg

Thanks for your help guys.

Sent from my SM-G988B using Tapatalk

1st pic is heater blower

3rd pic is only used once in factory for ref position of crankshaft. No longer used after.

Don't know about the other two. Don't have them on my car (88 RoW Carrera).

Thanks for your help. I was planning to plug o2 into the 3rd pic, as it's where others have indicated it should be. Did you mean 2nd pic is the one off used in factory?

Sadly I have other problems now. [emoji17]

https://uploads.tapatalk-cdn.com/202...cb5f18c89a.jpg

Sent from my SM-G988B using Tapatalk

You have posted 4 pics, right?
- First pic is heater blower connector
- Second pic (green connector) don't know what it is, never seen it.
- Third pic is indeed the ref sensor connector used only once at factory
- Fourth pic is presumably the O2 sensor connector, harness part to ECU. If so, you need to buy the very first sensor from ebay that you posted the other day and plug it there.
But as said before, first check that you have the correct ECU that is able to manage O2 sensor, otherwise no good.
My 88 RoW with 930/20 engine has no cat and was shipped with a premuffler without any O2 sensor and no harness for it. So I cannot tell for sure that this is correct.

Yes, you're right, my apologies. Fourth pic was the sensor. So the sensor is fitted, it went in perfectly and the car is now behaving beautifully.

After a few shenanigans.

https://uploads.tapatalk-cdn.com/202...d1d4fa0fa8.jpg

Thanks for your help.


Sent from my SM-G988B using Tapatalk

just one more suggestion replace your fuel filter...it has been there since 2017;-) that is kinda too long
Ivan

Pretty sure my eprom is 1267355357. The car has an aftermarket exhaust and in one of the doors I found a torn off O2 sensor cable so I suspect it was removed at some point.

Sent from my SM-G988B using Tapatalk

Thanks for pointing that out. Just so happens I have a new one recently bought in a box waiting to go in.

Sent from my SM-G988B using Tapatalk