<e30> re: Oxygen Sensor

[Christopher Pawlowicz <chrisp@xxxxxxxxxxxxxxx>]

Chris Baisley sez
>Recently the 'check engine' light in my 89 325i has been coming on
>periodically at moderate highway speeds.  It comes on breifly, then goes
>
>Question 1: is this enough information for me to conclude that all I need
>to do is get a new O2 sensor?
>
>Question 2: what is the general concensus on using the Ford part instead of
>BMW OE stuff?
>

you can check output of the o2 sensor with a voltmeter.. 
with car warmed up, hook the dvm across 2 wires of the o2 sensor and you
should get a voltage which varies between 0 and 1 volt..

(I had your same symptoms, checked and got 0.2 to 0.4 volts for o2 sensor
 which meant it was dead)

getting the old o2 sensor out might be a pain in the ass
but replacing it should fix the problem


I don't think the ford sensor will work.. (it is a 2 wire)
you have a 3 wire sensor (includes a heater)

or is that 3/4 wire.. 


chris pawlowicz
'89 325i
'74 2002

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