O2 sensor replacement and alternatives

mikeokimster · 03-04-2013, 08:14 PM

The bank two pre-primary cat o2 sensor went out due to a short. The dealer is charging $289.00 for this parts WTF!?!? Is there anyone that is running any alternatives?

My rear o2 sensors are disabled with the ESS tune. Are there any differences in the physical capabilities between the front and rear o2 sensors or is it just the cable length? I have done a few searches to no avail..

EDIT: I found out that the front sensors are wideband and the rear sensors are narrow band

No. Description Supplement
Qty Part Number

01 REGULATING LAMBDA PROBE L= 340MM
2 11787537984

03 Lambda probe, black L= 325MM
2 11787539125

Chriskm3 · 03-04-2013, 08:16 PM

Sounds about right. And they sensors r different

mikeokimster · 03-04-2013, 08:20 PM

Quote:

Originally Posted by Chriskm3

Sounds about right. And they sensors r different

Just found out they are arrrggghhhh

Is anyone running aftermarket front wideband o2 sensors? If so what brand and was it plug and play?

MilehighM3 · 03-04-2013, 09:07 PM

Call me crazy, but I don't think the price is that bad given the cost of the car.

Chriskm3 · 03-05-2013, 07:02 AM

Quote:

Originally Posted by Bmw135er

Call me crazy, but I don't think the price is that bad given the cost of the car.

When warranty runs out these cars can be expensive to repair

happos2 · 03-05-2013, 07:10 AM

reading comprehension fail...Pre-primary - my bad

pbonsalb · 03-05-2013, 08:17 AM

The car needs both primary 02 to run properly. The 02 looked pretty standard to me, like Bosch WB02, but I did not check for part numbers or do any cross referencing when I had them out.

What sometimes happens is people twist them out instead of disconnecting the harness and unscrewing them, when changing the midpipe to an x-pipe. The top of the 02 is sharp and cuts into one or more of the wires, either severing it or shorting it. Left alone, they are pretty reliable and designed to run 100k miles.

guardodoc · 03-05-2013, 01:10 PM

11787537984
Bosch are available for less than $150

go to furiousmethod.com and plug in part number.
It will search 20 part suppliers.

pbonsalb · 03-05-2013, 01:31 PM

$147 at one of my regulars, autohausaz.com

M3PO · 03-05-2013, 07:18 PM

Yep, just make sure it is the correct Bosch sensor. You can get it less than the dealer is charging for sure.

IMG · 03-05-2013, 08:47 PM

Quote:

Originally Posted by mikeokimster

The bank two pre-primary cat o2 sensor went out due to a short. The dealer is charging $289.00 for this parts WTF!?!? Is there anyone that is running any alternatives?

My rear o2 sensors are disabled with the ESS tune. Are there any differences in the physical capabilities between the front and rear o2 sensors or is it just the cable length? I have done a few searches to no avail..

EDIT: I found out that the front sensors are wideband and the rear sensors are narrow band

No. Description Supplement
Qty Part Number

01 REGULATING LAMBDA PROBE L= 340MM
2 11787537984

03 Lambda probe, black L= 325MM
2 11787539125

http://www.ecstuning.com/BMW-E92-M3-S65_4.0l/ES2226210/
Replace both of them !

pbonsalb · 03-06-2013, 06:04 AM

That link is for the narrow band 4 wire post cat 02. I think ECS charges $167 for the wide band five wire primary 02s.

MFKN3 · 03-26-2013, 12:47 AM

Can the pre-cat sensors be swapped on jack stands at home with standard tools? It's hard to tell in the diagram, but hoping the pipes don't need dropping?

kerrit · 03-26-2013, 01:15 AM

Quote:

Originally Posted by MFKN3

Can the pre-cat sensors be swapped on jack stands at home with standard tools? It's hard to tell in the diagram, but hoping the pipes don't need dropping?

You won't be able to get an o2 sensor socket on them, but you can just use an open ended wrench to get them out. Shouldn't have to drop the x-pipe.

Fen335i · 03-26-2013, 08:12 PM

Quote:

Originally Posted by mikeokimster

The bank two pre-primary cat o2 sensor went out due to a short. The dealer is charging $289.00 for this parts WTF!?!? Is there anyone that is running any alternatives?

My rear o2 sensors are disabled with the ESS tune. Are there any differences in the physical capabilities between the front and rear o2 sensors or is it just the cable length? I have done a few searches to no avail..

EDIT: I found out that the front sensors are wideband and the rear sensors are narrow band

No. Description Supplement
Qty Part Number

01 REGULATING LAMBDA PROBE L= 340MM
2 11787537984

03 Lambda probe, black L= 325MM
2 11787539125

One of my pre-cat 02 sensors went out this week as well. I called about 5-6 places and found that ECS was the cheapest at $148 for the Bosch branded sensor. From what I was told, Bosch makes the OEM 02 sensor for BMW, so you might as well buy the cheaper Bosch sensor, since it's literally the same thing....and about $40 cheaper than the OEM one. (ESC was selling the OEM one for about $190)

NikB316 · 03-26-2013, 08:31 PM

Yeah I paid like $180 including installation from my local shop. Check out the link IMG posted...

GOVCO · 07-16-2013, 07:42 PM

....and mine went bad last week. Lovely. Time to shop around. Same part 11787537984.

saadrvb · 07-16-2013, 11:11 PM

You can get it less than the dealer is charging for sure.

happos2 · 07-17-2013, 07:33 AM

Quote:

Originally Posted by GOVCO

....and mine went bad last week. Lovely. Time to shop around. Same part 11787537984.

I replaced mine. The cheapest I found around was on Amazon. $112 for the front and about $90 for the rear. I saved on the labor as I did the work myself when the car was up on jackstands. I hope this helps!!

Are are the links:

Pre-Cat
http://www.amazon.com/Bosch-17039-Ox.../dp/B000JZEXG8

Post-Cat
http://www.amazon.com/Bosch-16793-Ox...1&s=automotive

GOVCO · 07-17-2013, 05:43 PM

Thanks everyone.....for some reason the check engine light is now off....[scratches head]... hmmmm....

pbonsalb · 07-17-2013, 07:57 PM

Quote:

Originally Posted by happos2

I replaced mine. The cheapest I found around was on Amazon. $112 for the front and about $90 for the rear. I saved on the labor as I did the work myself when the car was up on jackstands. I hope this helps!!

Are are the links:

Pre-Cat
http://www.amazon.com/Bosch-17039-Ox.../dp/B000JZEXG8

Post-Cat
http://www.amazon.com/Bosch-16793-Ox...1&s=automotive

The precat 02, Bosch 17039, is about $65 shipped on ebay, but with some searching, you can find them for about $55 shipped. This is actually a little cheaper than the best price I have seen for the post cat 02.

happos2 · 07-17-2013, 08:14 PM

Quote:

Originally Posted by pbonsalb

The precat 02, Bosch 17039, is about $65 shipped on ebay, but with some searching, you can find them for about $55 shipped. This is actually a little cheaper than the best price I have seen for the post cat 02.

Good find! I have had one too many bad experiences with EBAY so I didn't even look there. But that is some good information!

03-04-2013, 08:14 PM	#1
mikeokimster Lieutenant Colonel 205 Rep 1,699 Posts Drives: e90 jerez m3 Join Date: Sep 2005 Location: North Seattle, WA iTrader: (10)	O2 sensor replacement and alternatives The bank two pre-primary cat o2 sensor went out due to a short. The dealer is charging $289.00 for this parts WTF!?!? Is there anyone that is running any alternatives? My rear o2 sensors are disabled with the ESS tune. Are there any differences in the physical capabilities between the front and rear o2 sensors or is it just the cable length? I have done a few searches to no avail.. EDIT: I found out that the front sensors are wideband and the rear sensors are narrow band No. Description Supplement Qty Part Number 01 REGULATING LAMBDA PROBE L= 340MM 2 11787537984 03 Lambda probe, black L= 325MM 2 11787539125 __________________ Current: 10' E90 Jerez M3 DCT ///Mods: Xpel front clip wrap, Nokya 2500k H8 halos, matte grills, IND reflectors, scoops, MS drop-in, MS track pipes, Dinan exhaust, 240E, ESS tune, BBS CHR, s04 255x35 295x30, KW Clubsports, ceramic pads Retired: 08' E92 328i JB 6mt 212 rwhp 190 rwtq
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03-04-2013, 08:16 PM	#2
Chriskm3 Colonel 59 Rep 2,186 Posts Drives: M3 Join Date: Jul 2012 Location: Toronto iTrader: (4)	Sounds about right. And they sensors r different __________________ Vf supercharger + tune/H&R coils/ Akra evolution exhaust/Volk te37/ Rs-3 tires/ Brembos /TIal BOV/ OSS blacked out headlights/LUX v3/Led taillights/ Challenge Front lip/ P3 vent gauge/ F10 m5 shift mob/Matte black front grills/ And a funky air fresher
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03-04-2013, 09:07 PM	#4
MilehighM3 Brigadier General 915 Rep 3,456 Posts Drives: Harrop E90 M3 Join Date: May 2011 Location: Colorado Springs iTrader: (14) Garage List 2009 E90 M3 [6.50]	Call me crazy, but I don't think the price is that bad given the cost of the car.
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03-05-2013, 07:10 AM	#6
happos2 Dingleberries 76 Rep 1,246 Posts Drives: Gray E92 M3 Join Date: May 2012 Location: Indiana iTrader: (3)	reading comprehension fail...Pre-primary - my bad Last edited by happos2; 03-05-2013 at 08:30 AM..
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03-05-2013, 08:17 AM	#7
pbonsalb Lieutenant General 5231 Rep 10,614 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	The car needs both primary 02 to run properly. The 02 looked pretty standard to me, like Bosch WB02, but I did not check for part numbers or do any cross referencing when I had them out. What sometimes happens is people twist them out instead of disconnecting the harness and unscrewing them, when changing the midpipe to an x-pipe. The top of the 02 is sharp and cuts into one or more of the wires, either severing it or shorting it. Left alone, they are pretty reliable and designed to run 100k miles.
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03-05-2013, 01:10 PM	#8
guardodoc Second Lieutenant 34 Rep 293 Posts Drives: M3 e92, 1986 325e 2021 X5 40i Join Date: May 2007 Location: San Clemente iTrader: (0)	Furious Method 11787537984 Bosch are available for less than $150 go to furiousmethod.com and plug in part number. It will search 20 part suppliers.
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03-05-2013, 01:31 PM	#9
pbonsalb Lieutenant General 5231 Rep 10,614 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	$147 at one of my regulars, autohausaz.com
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03-05-2013, 07:18 PM	#10
M3PO Colonel 84 Rep 2,792 Posts Drives: '08 IB E92 Join Date: Sep 2011 Location: OC iTrader: (7)	Yep, just make sure it is the correct Bosch sensor. You can get it less than the dealer is charging for sure. __________________ 2008 IB E92 M3\| BBS \| KW \| Arkym \| Platte Forme A.G. \| Active Autowerke \| K&N \| Fabspeed \| Dinan \| Evolve-R
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03-06-2013, 06:04 AM	#12
pbonsalb Lieutenant General 5231 Rep 10,614 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	That link is for the narrow band 4 wire post cat 02. I think ECS charges $167 for the wide band five wire primary 02s.
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03-26-2013, 12:47 AM	#13
MFKN3 Colonel 127 Rep 2,224 Posts Drives: supercharged 4.4L stroker E92 Join Date: Nov 2008 Location: Australia iTrader: (2)	Can the pre-cat sensors be swapped on jack stands at home with standard tools? It's hard to tell in the diagram, but hoping the pipes don't need dropping?
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03-26-2013, 08:31 PM	#16
NikB316 Captain 56 Rep 605 Posts Drives: 2014 M5 Competition, F83 M4 Join Date: Aug 2007 Location: Miami, Florida iTrader: (4)	Yeah I paid like $180 including installation from my local shop. Check out the link IMG posted... __________________ 2014 M5 Competition Alpine/Sakhir BMS Tune. Undercover Performance Custom Downpipes & Connector. H&R 10mm Spacers. BMW CF Rear Spoiler. IND Cosmetics. ALP & BEL Radar & Laser. 2011 Space Grey E92 M3 AA Gen 2 Lvl 3 586whp 398wtq SAE (sold)
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07-16-2013, 07:42 PM	#17
GOVCO Lieutenant 16 Rep 439 Posts Drives: 09 E90 AW M3 DCT [Slight Mods] Join Date: Jun 2011 Location: MD iTrader: (0)	....and mine went bad last week. Lovely. Time to shop around. Same part 11787537984.
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07-16-2013, 11:11 PM	#18
saadrvb New Member 0 Rep 11 Posts Drives: bmw Join Date: Jul 2013 Location: forum iTrader: (0)	You can get it less than the dealer is charging for sure. __________________
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07-17-2013, 05:43 PM	#20
GOVCO Lieutenant 16 Rep 439 Posts Drives: 09 E90 AW M3 DCT [Slight Mods] Join Date: Jun 2011 Location: MD iTrader: (0)	Thanks everyone.....for some reason the check engine light is now off....[scratches head]... hmmmm....
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