Do I have harness A or B? Pure Stage 2 needing N20 Tmap

boostd92 · 07-26-2019, 12:01 PM

I'm running out of boost sensor resolution with my PS2 and was wondering if someone could clarify what type (harness A or B) my 2011 N55 has. It was built in 01/2011. I've already ordered an N20 Tmap sensor, just trying to plan for what kind of harness mods I may need.

Here is a pic if needed:

Supermoon · 07-26-2019, 12:29 PM

You have type A connector.
N20 TMAP sensor is type B so you have two options:

1. PNP adapter from BMS: LINK

2. Type B (P/N: 12527549033) connector and re-pin in reverse order.
If you wanna do it perfectly you can get new pins (4 x P/N: 12527545858) and bushings (4 x P/N: 61138366245).

boostd92 · 07-26-2019, 01:08 PM

Thanks for the reply. Strange because my connector looks just like the one in this youtube video:

around 2:36s.

Can I not repin my connector?

Supermoon · 07-26-2019, 01:53 PM

Quote:

Originally Posted by boostd92

Can I not repin my connector?

That video is misleading and I was also a victim of that irresponsible video.
Yes you can re-pin type A connector and make it work for a short time but it can easily fall out.
I edited my post above because I realized new pins and bushings aren't really required. You just need a type B connector that's all.

boostd92 · 07-26-2019, 01:56 PM

Wow! Your'e the first person I've seen to say this online. I've been forum searching all morning for these answers.

So the type-a plug doesn't lock into the N20 (type B) end? Are all these other people just hoping it doesn't fall out? Crazy... the connector is cheap..

Supermoon · 07-26-2019, 02:26 PM

Quote:

Originally Posted by boostd92

Wow! Your'e the first person I've seen to say this online. I've been forum searching all morning for these answers.

So the type-a plug doesn't lock into the N20 (type B) end? Are all these other people just hoping it doesn't fall out? Crazy... the connector is cheap..

No it won't lock unless you dremel the sensor to make a hole in the middle.
Not many people know the part number for the type B connector that's probably why.
BMS left a comment on that video (or something else similar) to warn about the issue.
I first had no clue what they were talking about.

boostd92 · 07-26-2019, 03:57 PM

Good info to have. I need to make a log tonight so I think I'll re-pin for now, and tape it on real good and the connector will come in and I'll switch it out.

Thanks again for the useful information!!!

Divbetic · 07-27-2019, 03:41 AM

I also followed the video above on a 2011 135i. When reversing the wires they all clicked in without trouble but like Supermoon mentioned there was no way to lock the plug and sensor. It's been a couple months but if it fails is the correct swap done with PN 12527549033? Do I keep the reversed order mentioned from the video? Sorry to thread jack lol.

boostd92 · 07-27-2019, 10:34 AM

Wow that was a super easy job. My parts department actually had the N20 connector in stock! Took 15 minutes to reverse the wires, install the N20 sensor, and click it in with that satisfying OEM lock click.

I can now see my PS2 N55 is making 23psi near redline! Good info to have.. hah.

mike@x-ph.com · 07-30-2019, 01:33 PM

Quote:

Originally Posted by boostd92

Wow that was a super easy job. My parts department actually had the N20 connector in stock! Took 15 minutes to reverse the wires, install the N20 sensor, and click it in with that satisfying OEM lock click.

I can now see my PS2 N55 is making 23psi near redline! Good info to have.. hah.

jlegelis · 09-10-2019, 12:09 AM

Great post. Supermoon I have a late N55 (2013) E92 with a Type B harness and am planning on a PS2, so I need the N20 sensor. Does my type B harness also require the pin swap / reversal to support the N20 sensor? Any tips appreciated, thx

Ozzie335i · 09-10-2019, 09:28 PM

Quote:

Originally Posted by boostd92

I can now see my PS2 N55 is making 23psi near redline! Good info to have.. hah.

So how does she feel?

Supermoon · 09-10-2019, 11:52 PM

Quote:

Originally Posted by jlegelis

Great post. Supermoon I have a late N55 (2013) E92 with a Type B harness and am planning on a PS2, so I need the N20 sensor. Does my type B harness also require the pin swap / reversal to support the N20 sensor? Any tips appreciated, thx

Nope type b is plug and play.

boostd92 · 09-13-2019, 10:10 AM

Quote:

Originally Posted by Ozzie335i

So how does she feel?

Fast but I'm still sorting out other issues. Tried to take it to the strip this last Tuesday and ran a 12.5@116mph - that was at 21psi with throttle cutting at the very top of third and most of fourth.

I'm still struggling with my tuner to get a good calibration - MHD tunes by load instead of boost and we're trying to find a good load ceiling but my car keeps making more power and cuts the throttle/timing when i go over the load threshold.

If I could make a clean pass at full boost I'd guess she has a mid-low 11 in it around 120mph. I'd be very happy with that.

Going to get the Helix HPFP OD so I can run 100% E85 and then the tuning will be less complicated than trying to mix for E50.

07-26-2019, 12:01 PM	#1
boostd92 Captain 63 Rep 762 Posts Drives: '11 E92 M-Sport Join Date: Jun 2009 Location: Chicago, IL iTrader: (1) Garage List 2011 BMW 335i M-Spo ... [7.26]	Do I have harness A or B? Pure Stage 2 needing N20 Tmap I'm running out of boost sensor resolution with my PS2 and was wondering if someone could clarify what type (harness A or B) my 2011 N55 has. It was built in 01/2011. I've already ordered an N20 Tmap sensor, just trying to plan for what kind of harness mods I may need. Here is a pic if needed:
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07-26-2019, 12:29 PM	#2
Supermoon Lieutenant 166 Rep 429 Posts Drives: 2011 e92 335xi Join Date: Aug 2015 Location: Seoul iTrader: (6) Garage List 2011 BMW 335i xDriv ... [10.00]	You have type A connector. N20 TMAP sensor is type B so you have two options: 1. PNP adapter from BMS: LINK 2. Type B (P/N: 12527549033) connector and re-pin in reverse order. If you wanna do it perfectly you can get new pins (4 x P/N: 12527545858) and bushings (4 x P/N: 61138366245). __________________ 2011 E92 335i xDrive Pure Stage 1 \| DV+ & Inlet \| Injen Intake \| M3 Cowl \| ETS 5" FMIC & CP \| Aquamist HFS4 Direct Port \| CSF Radiator \| Wagner Catted DP \| BMW PE \| Apex FL-5 \| Michelin PS4S \| 335is Engine mount \| SDW Monoball thrust arms \| UUC Swaybars & SS Brake lines \| Bilstein B8 \| Dinan Springs & Shock mounts \| Whiteline RSFB \| M3 Rear Control arms \| Manzo Toe arms \| Wavetrac LSD Last edited by Supermoon; 07-26-2019 at 01:46 PM..
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07-26-2019, 01:08 PM	#3
boostd92 Captain 63 Rep 762 Posts Drives: '11 E92 M-Sport Join Date: Jun 2009 Location: Chicago, IL iTrader: (1) Garage List 2011 BMW 335i M-Spo ... [7.26]	Thanks for the reply. Strange because my connector looks just like the one in this youtube video: around 2:36s. Can I not repin my connector?
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07-26-2019, 01:56 PM	#5
boostd92 Captain 63 Rep 762 Posts Drives: '11 E92 M-Sport Join Date: Jun 2009 Location: Chicago, IL iTrader: (1) Garage List 2011 BMW 335i M-Spo ... [7.26]	Wow! Your'e the first person I've seen to say this online. I've been forum searching all morning for these answers. So the type-a plug doesn't lock into the N20 (type B) end? Are all these other people just hoping it doesn't fall out? Crazy... the connector is cheap..
	Appreciate 0 Quote

07-26-2019, 03:57 PM	#7
boostd92 Captain 63 Rep 762 Posts Drives: '11 E92 M-Sport Join Date: Jun 2009 Location: Chicago, IL iTrader: (1) Garage List 2011 BMW 335i M-Spo ... [7.26]	Good info to have. I need to make a log tonight so I think I'll re-pin for now, and tape it on real good and the connector will come in and I'll switch it out. Thanks again for the useful information!!!
	Appreciate 0 Quote

07-27-2019, 03:41 AM	#8
Divbetic Private First Class 76 Rep 161 Posts Drives: 2011 135i Join Date: Feb 2018 Location: Placer County, CA iTrader: (0)	I also followed the video above on a 2011 135i. When reversing the wires they all clicked in without trouble but like Supermoon mentioned there was no way to lock the plug and sensor. It's been a couple months but if it fails is the correct swap done with PN 12527549033? Do I keep the reversed order mentioned from the video? Sorry to thread jack lol. __________________ 2011 135i 6MT PS2 \| Fuel-It PI \| MHD Last edited by Divbetic; 07-27-2019 at 05:22 AM..
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07-27-2019, 10:34 AM	#9
boostd92 Captain 63 Rep 762 Posts Drives: '11 E92 M-Sport Join Date: Jun 2009 Location: Chicago, IL iTrader: (1) Garage List 2011 BMW 335i M-Spo ... [7.26]	Wow that was a super easy job. My parts department actually had the N20 connector in stock! Took 15 minutes to reverse the wires, install the N20 sensor, and click it in with that satisfying OEM lock click. I can now see my PS2 N55 is making 23psi near redline! Good info to have.. hah.
	Appreciate 0 Quote

09-10-2019, 12:09 AM	#11
jlegelis Private First Class 33 Rep 129 Posts Drives: 2013 E92 N55 MT MSport Join Date: Jan 2013 Location: Boston, MA iTrader: (0)	Great post. Supermoon I have a late N55 (2013) E92 with a Type B harness and am planning on a PS2, so I need the N20 sensor. Does my type B harness also require the pin swap / reversal to support the N20 sensor? Any tips appreciated, thx
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