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Just a few questions actually...
How good are BMW OE O2 sensors?? They are kinda pricey at about $85 each... I know a place that sells these sensors for half price... Wonder if it is worth the price for OE ones...
Also, who makes BMW's OE O2 sensors?? I saw bosch's advertisement on their sensors.. maybe it is a better option??
As for fuel filters.. How often should I replace it on a street car??.. And how involve is it to replace them?
Thanks in Advance...
Last edited by JT-KGY; 04-21-2001 at 08:29 AM.
Member
Based on experience, BMW sensors can fail when new and last up to a little over 100k miles.
$85 seems resonable but the M3 uses different kinds of O2 sensors. Just make sure you get the right one.
If you have a 95 M3 3.0L engine, it uses one Bosch O2 sensor and has a bit fat probe and short wiring.
The post '96 M3 3.2L engines has 4 O2 sensors. Those sensors are made my Siemens and the probes and wiring are differ from the Bosch. The pre-cat and post-cat O2 sensors also differ in wire length.
Most people replace their engine oil filter when they're replacing engine oil. All you need is a basic metric tool set.
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I have post 96 3.2L... Do you think I should stay strictly with BMW sensors??Originally posted by Jon Caldito
Based on experience, BMW sensors can fail when new and last up to a little over 100k miles.
$85 seems resonable but the M3 uses different kinds of O2 sensors. Just make sure you get the right one.
If you have a 95 M3 3.0L engine, it uses one Bosch O2 sensor and has a bit fat probe and short wiring.
The post '96 M3 3.2L engines has 4 O2 sensors. Those sensors are made my Siemens and the probes and wiring are differ from the Bosch. The pre-cat and post-cat O2 sensors also differ in wire length.
Most people replace their engine oil filter when they're replacing engine oil. All you need is a basic metric tool set.
Sorry... not oil filter... my bad.. i meant fuel filters...
Member
JT-KGY,
I would recommend staying with OEM Spec sensors, especially the oxygen sensors. Changing them on your 3.2L would be a little difficult. You would need to buy an oxygen sensor socket with a crowfoot design (22mm). Thats the only tools that gonna fit.
Just for your infomation, on my 3.2L, the pre-cat bank one O2 sensor went out on me at around 28k. My pre-cat bank two O2 sensor went out soon after around mid 30k but I didn't change it till 53k.
As for the fuel filter, BMW says that the newer filters are lifetime due to the stages inside the filter. Your car has a really long filter about a foot long and I dont know if they sell those at auto stores. I think the BMW parts dept. charges around $30. The filter is located underneath the body, below the drivers seat and is covered by a plastic or metal panel.
There isnt a mileage spec to replace them but due to its size and price, every 40k seems right to me.
Member
Jon,
28k for the sensors..???..
My car is already at 45k... and I've been wondering why my gas mileages aren't as good as before... maybe I should get them replaced asap...
(although I never get any "Check Engine" from it..)
Thanks Jon,
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