Re: Maintenance questions

Thank you!  and especially to all of you for the comments.

The O2 sensors are not defective, I was almost about to replace them
just for preventive care.  Since I can leave them alone, I may
reconsider.  This car is for keeps and am looking to get the most out
of it.

> It's good to see you're maintaining the vehicle.. it will make a fine
used car for someone someday.

Yeah, like they say.....take care of your car and it will take care of
you :-)

Will



admin wrote:
> weng94 wrote:
> > Hello,
> >
> > I'm planning on replacing spark plugs, O2 sensor, and the coolant soon.
> >
> > Is it true there are two sensors to replace on an 2002 325i?  I wasn't
> > sure on this one.
>
> There may be 4 O2 sensors - at about $125 each.. so replacing them when
> not needed is a rather expensive thing to do. The number you have is
> dependent on if you have a split (dual) exhaust - or the combined one
> with a single catalytic converter. The parts book isn't clear on this -
> and would have to use a VIN# to really check (or eyeball..)  You can
> look up your car and it's parts at http://www.realoem.com
>
> Unless you're seeing a check-engine-light (or service-engine-soon) and
> are over 100k miles, I'd leave them alone. They typically will last
> longer than 100k miles. The O2 sensors that are behind the catalytic
> converters rarely ever need replacement - they are almost along for the
> ride. They are used to monitor how well the cat-converters are working
>
> The plugs on your 2002 are also 100k mile items.
>
> > Also, can a 2 year complete drain and refill w/ bmw coolant be a
> > substitute vs. doing a complete flush every 4 years?
>
> Yes - and that will probably be overkill (the frequency)
>
>
> > Any other details that I should know about will be greatly appreciated.
> > Tia,
> > Will
>
> It's good to see you're maintaining the vehicle.. it will make a fine
> used car for someone someday.

.

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