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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, Nov-13-2017, 08:28:26 PM   #1
Paulo M
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Default O2 sensor confirmation

Hey can you guys confirm which one is bank1 sensor1? Iím assuming itís the purple one? Trying to fix a p0134 code.


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Old Mon, Nov-13-2017, 09:04:23 PM   #2
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Default Re: O2 sensor confirmation

Yes. Pre 1 in that pic. Bank refers to cyls 1-3 & 4-6 iirc. Upstream and downstream will often describe pre or post cat.
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Old Mon, Nov-13-2017, 09:39:00 PM   #3
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Default Re: O2 sensor confirmation

Sweet, thanks dude
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Old Mon, Nov-13-2017, 09:51:13 PM   #4
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Default Re: O2 sensor confirmation

One thing to caution - all the sensors have the same threads on them and could be screwed into any of the spots on exhaust manifold/header. So check, because just because the electric connector is plugged in right, the sensor itself could be on the wrong bank or pre could be in post spot and vice versa. Not all have long enough wires to cross pre vs post, but do those one at a time just to be sure.


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Old Mon, Nov-13-2017, 10:08:28 PM   #5
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Default Re: O2 sensor confirmation

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Originally Posted by mrgizmo04 View Post
One thing to caution - all the sensors have the same threads on them and could be screwed into any of the spots on exhaust manifold/header. So check, because just because the electric connector is plugged in right, the sensor itself could be on the wrong bank or pre could be in post spot and vice versa. Not all have long enough wires to cross pre vs post, but do those one at a time just to be sure.


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Or just use some masking tape and a sharpie and mark the stockers' locations before doing headers :thumbs up:
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-TMS Camber & Subf plates ∑ RE Street Trans Mounts ∑ AKG poly SUB/DIFF ∑ SDW RTAB ∑ ZHP knob + UUC DSSR ∑ GroundControl S/A (Koni/Eibach 440/550) + tall RSMs
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-Pioneer DEH-80PRS ∑ Eclipse PA5422 ∑ CDT HD-6 + WS-100i ∑ CDT EX-530 ∑ 8" Kicker

DD/Beater: 1999 Civic LX - Kenwood x998 ∑ PPI 1600.4 ∑ CDT HD-6 + HD-100 ∑ CDT EX-530 ∑ Clarion 10"
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Old Mon, Nov-13-2017, 10:23:32 PM   #6
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Default O2 sensor confirmation

My Preís weíre different in 05. Blue and Green lines were switched. The female connector portions were in the correct order as well. I looked at this diagram specifically along with marking the connectors before hand as well. Never had a single issue with them before or after minus the Bank 2 1 being too short after SS V1 install. I removed each one and transplanted it on the SSís. Thereís no way I got them wrong.


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Old Tue, Nov-14-2017, 01:21:05 AM   #7
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Default Re: O2 sensor confirmation

http://www.m3forum.net/m3forum/showthread.php?t=463673
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Old Tue, Nov-14-2017, 06:14:58 PM   #8
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Default Re: O2 sensor confirmation

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Originally Posted by dafoe View Post
Haha I actually saw that after I made the thread. Very helpful especially the pics. Thanks

What sucks is my engine light went away after driving around for a day. Unfortunately I already bought the sensor lol, not sure what happened there. Probably something to do with the weather change/rain.
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Discussing O2 sensor confirmation in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)