O2 Oxygen Sensor S4? - Alfa Romeo Bulletin Board & Forums
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post #1 of 9 (permalink) Old 02-25-2019, 05:37 PM Thread Starter
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O2 Oxygen Sensor S4?

Hello,

Any thoughts about where to buy a new O2 sensor and which brand/number?

Thanks,
Rande

Rande
1991 Spider Veloce - automatic & white, gotta problem with that?
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post #2 of 9 (permalink) Old 02-25-2019, 06:06 PM
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rande: My O2 sensor failed in October, 2018, and I had it replaced at Di Fatta Brothers in Baltimore. They do a large parts business, shipping all over the country. They had the correct sensor for my S4 1993 spider (also an automatic!). Contact info is:
Di Fatta Brothers | Alfa Romeo Parts | Fiat Parts
Order line: (800) 638-7656

Good luck!
Steve
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post #3 of 9 (permalink) Old 02-25-2019, 11:57 PM
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the original O˛ sensor with the original plugs, would be Bosch
(short p/n 13957 or Bosch 0 258 003 957 )
length 123,6 cm (some listings say 128,3 cm)

you can also get aftermarket that you need to splice the wiring in.

Original alfa part number for the S4 is 7654221

Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.

Last edited by spiderserie4; 02-26-2019 at 03:51 AM.
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post #4 of 9 (permalink) Old 02-26-2019, 07:02 AM Thread Starter
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Thanks for the info, I am using iridium spark plugs, will that make a difference for the O2 sensor?

Rande
1991 Spider Veloce - automatic & white, gotta problem with that?
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post #5 of 9 (permalink) Old 02-26-2019, 08:19 AM
But Mad North-Northwest
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No, plugs don't make a difference.

I was going to say to get one of the Bosch universal fit ones and splice it into your existing plugs, but it looks like Rock Auto has the OEM Bosch one for $55 which is a pretty good price. I'd just get that.

Tom

1963 Giulia Spider (1750 engine)
1974 GTV
1991 Spider
Former: 1987 Milano Gold
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post #6 of 9 (permalink) Old 02-27-2019, 04:57 PM
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I have been using this one in my 1991 for 5 years without issue. Picked up at local parts store.

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Good luck,

Vin
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post #7 of 9 (permalink) Old 02-28-2019, 07:25 AM Thread Starter
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thank you!

Rande
1991 Spider Veloce - automatic & white, gotta problem with that?
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post #8 of 9 (permalink) Old 02-28-2019, 07:53 AM
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Quote:
Originally Posted by Vintre View Post
I have been using this one in my 1991 for 5 years without issue. Picked up at local parts store.

Attachment 1553276

Good luck,

Vin
is that plug 'n play Vin? or does it need splicing in?
Cheers, Dom

Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.
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post #9 of 9 (permalink) Old 02-28-2019, 05:25 PM
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Quote:
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is that plug 'n play Vin? or does it need splicing in?
Cheers, Dom
Plug n play

Vin
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