[bmw] Question on 740i

["David Bokaie \(bokaie\)" <bokaie@xxxxxxxxx>]

Recently I purchased a used 2001 740i with sport package and I have a
few questions.  It has the M62 (4.4l, V8) engine with roughly 60K mikes.

1- On other 740i of the same model year, I noticed that they have their
day light driving light on.  On mine it is off (which would be my
preference).  However I am wondering why some do have day light driving
light and some don't.  I don't think that owners are turning the light
on just to make their cars more visible. 

2- Service Engine Soon Light come on intermittently.  I checked the code
and it complains about the pre Cat Oxygen Sensor failing on both banks
of the engine.  I know some times these faults are false failures and I
hate to spend few hundred bucks and see the check lights come back gain.
Has anyone death with this in the past.  Also I am curious why the
service light goes off when the fault code have not be cleared.  Is
there a timer in the Fuel Injection brain that says, we have not seen
this fault for a while and lets turn the light off until we see the
fault again.  If so, I would assume that the oxygen sensor is working
correctly most of the time.  BTW, the car just passed smog with no
problem (Fortunately the service light was off)

3- Gas gauge occasionally shows incorrect fuel level especially right
after the fill up.  On my 99 M3, I see the same problem as well.  On the
M3 gauge occasionally jumps around between full and empty and eventually
shows the correct fuel level until the next fill up.  On the  740, it
shows incorrect level (without jumping around) and after a few restart
it figures out the correct level (note that the distance to empty is
equally messed up).

4- At idle with the radio off, from inside the car I can hear a very low
level clicking noise.  I can not hear that when I open the hood with the
engine running.  I know it is difficult to diagnose these kind of issue
over email but was wondering if other V8 owners hear the same things in
their cars.


Thanks,

David
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