Where's O2 Sensor Bank 1 Sensor 1 for 1997 318is?

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liem00 - 22 Dec 2006 06:25 GMT

OBD scanner shows P0130 (O2 sensor Bank 1 Sensor 1) and P0135 (O2
heated circuit
for sensor Bank1 Sensor 1).
Autozone says 1997 318is has 4 sensors. 3 before catalytic converter,
and one behind.
Crawling under the car, I only see 2. One before and one after
catalytic converter.

Questions:
1. How many O2 sensors/monitors does '97 318is really have?
2. Where is Bank 1 Sensor 1?

Thanks in advance.

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Jeff Strickland - 23 Dec 2006 01:54 GMT

To my knowledge, it should have 2, one before and one after the CAT.

> OBD scanner shows P0130 (O2 sensor Bank 1 Sensor 1) and P0135 (O2
> heated circuit
[quoted text clipped - 9 lines]
>
> Thanks in advance.

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Pashlipops - 23 Dec 2006 09:24 GMT

Bank 1 Sensor 1 is upsteam of the catalyst.

Your car has 2 sensors, one upstream of the catalyst and one downstream
as you have observed and Jeff pointed out and as shwon below.

http://www.realoem.com/bmw/showparts.do?model=BE71&mospid=47426&btnr=18_0259&hg=
18&fg=10

> OBD scanner shows P0130 (O2 sensor Bank 1 Sensor 1) and P0135 (O2
> heated circuit
[quoted text clipped - 9 lines]
>
> Thanks in advance.

Reply to this Message

Pashlipops - 23 Dec 2006 09:24 GMT

Bank 1 Sensor 1 is upsteam of the catalyst.

Your car has 2 sensors, one upstream of the catalyst and one downstream
as you have observed and Jeff pointed out and as shown below.

http://www.realoem.com/bmw/showparts.do?model=BE71&mospid=47426&btnr=18_0259&hg=
18&fg=10

> OBD scanner shows P0130 (O2 sensor Bank 1 Sensor 1) and P0135 (O2
> heated circuit
[quoted text clipped - 9 lines]
>
> Thanks in advance.

Reply to this Message

liem00 - 15 Jan 2007 18:29 GMT

Thank you both for the valuable info.

> Bank 1 Sensor 1 is upsteam of the catalyst.
>
[quoted text clipped - 16 lines]
> >
> > Thanks in advance.

Reply to this Message

liem00 - 15 Jan 2007 19:11 GMT

A follow-up question.
I ended up buying two universal O2 sensors (#USOS-4000) to replace the
existing ones at this place;
see the last one on the list:
http://replacement.autopartswarehouse.com/parts/autopartswarehouse/quote.jsp?yea
r=1997&product=C5010-61263&application=000334014&part=Oxygen%20Sensor&dp=true

The old sensors have 4 wires, 2 whites, 1 black, 1 grey.
New sensors have the same number of wires and colors.
I made wire-by-wire connection, but I still get engine faults: P0130 &
P0136.
Any idea?

Thanks,
Liem

> Thank you both for the valuable info.
>
[quoted text clipped - 18 lines]
> > >
> > > Thanks in advance.

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