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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Help requested on Oxygen Sensor part numbers!!



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      09-22-2012, 12:39 AM   #1
jacobsed
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Help requested on Oxygen Sensor part numbers!!

I'm hoping somebody can please help me confirm my findings.

I have 2006 330xi produced 01/2006. Going from RealOem.com, it states the BMW part numbers are:

BMW Part#
1,2,3 upstream 11787558055
4,5,6 upstream 11787558073
1,2,3 down stream 11787545074
4,5,6 down stream 11787545075

I want to buy Bosch OE style with OE connector so it is all plug and play for me. When I look up my car on Bosch's website it lists 13477 for the upstream and 15109 for the down stream. These are not correct because the connector doesn't match at all.

When I look up a 2007 328xi on RealOem.com it lists the same part numbers as my 2006. So I look up a 2007 328xi on the Bosch site and it lists the following:

Bosch Part#
1,2,3 upstream 17098
4,5,6 upstream 17099
1,2,3 down stream 16795
4,5,6 down stream 16796

These look correct considering the pictures and description with lengths. So I am assuming I can buy these Bosch parts for my 2006 330xi since realoem.com has the equivalent BMW parts as the same for both the 2006 and 2007 xi models with the N52 engine.

I've been to some other sites to do some confirming and it appears the 2006 year is a little mixed up because of the previous model mixed in.

Thanks in advance!!

FYI, nothing is wrong with my current O2 sensors, but I have 122K miles and BMW recommends changing them at 120K. My gas mileage is 25.2 on the BC and the car runs like a dream. I wonder if I replace them if I'm really gaining anything or if I should wait until my mileage starts going down or I get an error code.
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      09-22-2012, 07:51 AM   #2
Efthreeoh
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So I ran into this problem too. What I did is go to the Bosch website and look up the P/Ns for a 2006 525i (which has the same N52 as in the '06 325i E90). This is what I found:

01 REGULATING LAMBDA PROBE L= 1400MM 1 11/2005 11787558055 $215.65 177.62 Bosch 17098
02 REGULATING LAMBDA PROBE L= 910MM 1 11/2005 11787558073 $215.65 177.62 Bosch 17099

So I think you have the correct P/Ns. Regarding your second question, you are correct, BMW recommends replacing the sensors at 120K. I had one of mine go at about 100K a few years ago and Tischer was selling it for only $55 back then (wish I had bought all four sensors back then). BMW has now jacked the price to $177 because it is time now where the '06s are all getting over 100,000 miles on them. I have 190,000 on my car and have not yet replaced the other 3 sensors. I am going to wait until the error codes come up for them. I keep explicit MPG records on my car, and have found the total MPG has dropped from an average of 27.6 MPG to 27.1 MPG in the last 100,000 miles or so. I chalk the mileage drop up to old age (maybe it's the O2 sensors, but maybe not).

As a side note; on my '99 F150, which was running like crap, a few years ago I replaced all of the O2 sensors at the same time, and noticed no increase in MPG. I replaced them along with the plug wires, plugs, and coil pack. It ran much better, but really did not jump up in MPGs.
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      09-22-2012, 08:22 AM   #3
jacobsed
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Thanks for the response! And what do you think about the downstream sensor part numbers? Same?

Quote:
Originally Posted by Efthreeoh View Post
So I ran into this problem too. What I did is go to the Bosch website and look up the P/Ns for a 2006 525i (which has the same N52 as in the '06 325i E90). This is what I found:

01 REGULATING LAMBDA PROBE L= 1400MM 1 11/2005 11787558055 $215.65 177.62 Bosch 17098
02 REGULATING LAMBDA PROBE L= 910MM 1 11/2005 11787558073 $215.65 177.62 Bosch 17099

So I think you have the correct P/Ns. Regarding your second question, you are correct, BMW recommends replacing the sensors at 120K. I had one of mine go at about 100K a few years ago and Tischer was selling it for only $55 back then (wish I had bought all four sensors back then). BMW has now jacked the price to $177 because it is time now where the '06s are all getting over 100,000 miles on them. I have 190,000 on my car and have not yet replaced the other 3 sensors. I am going to wait until the error codes come up for them. I keep explicit MPG records on my car, and have found the total MPG has dropped from an average of 27.6 MPG to 27.1 MPG in the last 100,000 miles or so. I chalk the mileage drop up to old age (maybe it's the O2 sensors, but maybe not).

As a side note; on my '99 F150, which was running like crap, a few years ago I replaced all of the O2 sensors at the same time, and noticed no increase in MPG. I replaced them along with the plug wires, plugs, and coil pack. It ran much better, but really did not jump up in MPGs.
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