"John Carrier" <jxc2@[EMAIL PROTECTED]
> wrote in message
news:fqWdnZakjeTLEzbanZ2dnUVZ_g2dnZ2d@[EMAIL PROTECTED]
>
> "RJD" <drenning@[EMAIL PROTECTED]
> wrote in message
> news:pv9mq39vv9mbq6uum6deceg4vj41c4h1ed@[EMAIL PROTECTED]
>> On Thu, 07 Feb 2008 10:10:54 -0500, Jinks <Jinks@[EMAIL PROTECTED]
>
>> wrote:
>>
>>> I have a 1997 328iC that is throwing catalytic converter codes along
>>>with O2 sensor codes. Both me & the local converter expert suspect the
>>>problem
>>>is actually more the O2 sensors than the converters, so I'm going to
try
>>>replacing them first. The problem is that BMW wants $200 + each for 4
of
>>>'em!
>>>That makes the sensors worth over $800!
>>> Does anyone know where I can find some after market O2 sensors at a
>>>reasonable price?
>>>-
>>>
>>>Jinks ('86FXRS, '07 FLTR)
>>>#64
>>>Remember, "No good deed goes unpunished"
>>
>> You can get replacement sensors from just about any well stocked parts
>> store. You can get them without the BMW dedicated connector for
>> approximately $50-70 or with the connector for around $100.00 a piece.
>> If yours have never been replaced it is a past due maintenance item.
>> The general consensus is about 100K miles before replacement but they
>> do deteriorate with time. They can be tough to remove but a little
>> heating from a torch works wonders.
>
> You can also approach the replacement as a phased effort. The sensors
> upstream of the converter are the more im****tant and when they fail,
your
> ECU will tend to overrichen the fuel mixture and impact mileage.
Replace
> them first, reset the OBD and see if that solves all or most of your
> problems. If not, then pursue the rear pair.
>
> R / John
>
I agree with John, but the OP says that both upstream sensors are bad, and
this sets off the alarms in my head. It is possible for both sensors to
fail
at the same time, but I'd be thinking that there is something that is
common
to them from the perspective of the rest of the system that is setting
them
off.
My theory on this one is that the sensors are properly re****ting a
condition
that is out of spec, and that there is a repair needed other than
replacing
the sensors. Having said that, a '97 should need new stuff about now ...
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