DIY: N20 TMAP - re-pin stock plug

bNks334 · 03-27-2017, 11:47 AM

The stock n55 TMAP is only good for reading up to 2.5bar (36.25 psi), which is the sum of both the barometric pressure reading (typically 14.1 to 15.1psi) and the pressure built up in the charge-pipe (stock 8psi to 21psi+). It is easy to see how the stock sensor is not ideal when pushing the limits of the stock turbo.

The answer is to move to a 3.5 bar (N20) TMAP or even a 4bar sensor. The problem is the stock plug fits into the N20 sensor upside down. You can either buy an adapter, or, you can re-pin your stock plug which is what I chose to do.

Sensor:
https://www.ecstuning.com/b-genuine-...r/13627843531/

The process is simple really:

1) Use something flat (screwdriver) to release the latch on the plug that holds the pins in place.
2) Use something like a paperclip or a thumbtack to release the pins.
3) Pull pins out of the plug.
4) Reinstall pins in reverse order.
5) Plug in your new N20 TMAP sensor.
6) Flash your new tune that is re-scaled to take advantage of an N20 TMAP (MHD for N55 has this option).

mpls_M3 · 03-29-2017, 11:00 PM

Nice, thanks a lot. Will be doing this shortly!

sgm.e90 · 05-02-2017, 09:09 PM

does this work on the n54 as well?

bNks334 · 05-04-2017, 07:41 AM

Quote:

Originally Posted by sgm.e90

does this work on the n54 as well?

No idea man. This is relevant to N55 Harness type A. Only noticed it because I bought the sensor before I bought the adapter and realized there so no need for the extra expense in the first place.

OTN55 · 06-08-2017, 05:37 PM

is there any pros getting this tmap sensor if im running mhd 2+?

bbnks2 · 06-09-2017, 09:20 AM

Quote:

Originally Posted by OTN55

is there any pros getting this tmap sensor if im running mhd 2+?

I don't think Stage 2+ pushes more than 20psi so you have some headroom left with the stock sensor. Not clue if the "greater resolution" of having a higher reading sensor would provide any benefits or not...

MMM335 · 07-18-2017, 11:27 AM

it works i tried it

sgm.e90 · 07-18-2017, 10:36 PM

Quote:

Originally Posted by MMM335

it works i tried it

For the N54?

MMM335 · 07-19-2017, 11:49 AM

^ re-pinned TMAP sensor, no need for burgermotorsports... just repin in reverse... saves $100

MMM335 · 07-19-2017, 11:53 AM

Quote:

Originally Posted by sgm.e90

For the N54?

Yup

bbnks2 · 07-19-2017, 01:37 PM

Quote:

Originally Posted by MMM335

Yup

Glad to see this confirmed! I am shocked that no-one else has realized this in years of tuning this platform...

MMM335 · 07-19-2017, 02:47 PM

as you can see their clearly just switched around the plug ends lol.

sgm.e90 · 07-27-2017, 05:09 AM

MMM335

are you showing the location of where the pins go on the N20 TMAP? looks the same as OEM...

bNks334 · 07-27-2017, 10:12 AM

Quote:

Originally Posted by sgm.e90

MMM335

are you showing the location of where the pins go on the N20 TMAP? looks the same as OEM...

It doesnt matter what the colors are. What matters is the pins are in the order of 1-2-3-4 and they need to be taken out and put back in in the opposite order 4-3-2-1. This only applies if your n20 sensor plugs in perfectly, but upside down (harness type A).

Label the wires yourself with some tape and a pen... No one can guarantee the wire color itself is the same across cars...

MMM335 · 07-28-2017, 07:07 PM

Quote:

Originally Posted by sgm.e90

MMM335

are you showing the location of where the pins go on the N20 TMAP? looks the same as OEM...

take them out and put them back in reverse order, not difficult as the plug-housing is typically just back to front lol

NoGuru · 08-08-2017, 12:41 PM

Very nice find!!

MMM335 · 08-12-2017, 05:08 PM

thanks it amazes lots ?

BMWintoxication · 12-11-2017, 02:22 AM

hummm needs to check if this works on my N54, n20 sensor on its way..

BrazyN54 · 12-26-2017, 10:05 PM

Well my 4bar tmap just took a dump. I wonder if I can use that harness and repin it for the 3.5?

NoGuru · 06-09-2018, 12:06 PM

Just did mine since I was hooking up Flex Fuel and already right there.

NoGuru · 06-11-2018, 10:52 AM

Had to revert it back. Was throwing codes even after I reset them.

TEC · 06-22-2018, 04:05 PM

Quote:

Originally Posted by NoGuru

Had to revert it back. Was throwing codes even after I reset them.

So you repinned your harness and it started throwing codes on a n54? Checking because I now have a n20 3.5 sensor in hand.

03-27-2017, 11:47 AM	#1
bNks334 Major 431 Rep 957 Posts Drives: '11 135i (N55) Join Date: May 2014 Location: New York iTrader: (1)	DIY: N20 TMAP - re-pin stock plug The stock n55 TMAP is only good for reading up to 2.5bar (36.25 psi), which is the sum of both the barometric pressure reading (typically 14.1 to 15.1psi) and the pressure built up in the charge-pipe (stock 8psi to 21psi+). It is easy to see how the stock sensor is not ideal when pushing the limits of the stock turbo. The answer is to move to a 3.5 bar (N20) TMAP or even a 4bar sensor. The problem is the stock plug fits into the N20 sensor upside down. You can either buy an adapter, or, you can re-pin your stock plug which is what I chose to do. Sensor: https://www.ecstuning.com/b-genuine-...r/13627843531/ The process is simple really: 1) Use something flat (screwdriver) to release the latch on the plug that holds the pins in place. 2) Use something like a paperclip or a thumbtack to release the pins. 3) Pull pins out of the plug. 4) Reinstall pins in reverse order. 5) Plug in your new N20 TMAP sensor. 6) Flash your new tune that is re-scaled to take advantage of an N20 TMAP (MHD for N55 has this option). Last edited by bNks334; 03-28-2017 at 09:46 AM..
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03-29-2017, 11:00 PM	#2
mpls_M3 Private First Class 90 Rep 96 Posts Drives: 18' F80 Join Date: Jan 2009 Location: Minneapolis iTrader: (0)	Nice, thanks a lot. Will be doing this shortly!
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05-02-2017, 09:09 PM	#3
sgm.e90 Major 45 Rep 1,185 Posts Drives: LCI F30 Join Date: Apr 2017 Location: Mid-Atlantic iTrader: (3)	does this work on the n54 as well? __________________ 2016 BMW 340i xDrive M Sports Package, M Aerodynamics Package, M Steering Wheel, Premium, Cold Weather, HK Surround, HUD
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06-08-2017, 05:37 PM	#5
OTN55 Second Lieutenant 42 Rep 165 Posts Drives: Fbo e92 n55 335i dct Join Date: Nov 2016 Location: Uk iTrader: (0)	is there any pros getting this tmap sensor if im running mhd 2+?
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07-18-2017, 11:27 AM	#7
MMM335 Lieutenant 95 Rep 531 Posts Drives: 335i Join Date: Jun 2016 Location: Gold Coast, Australia iTrader: (0)	it works i tried it __________________ 06' Space Grey 335i FBO MHD Stage 2+ e60 OTS\|VRSF V2 Catless DPs\|VRSF 7 Inch FMIC\|VRSF Charger Pipes\|Turbosmart Supersonic BOV\|K&N DCI's\|VRSF OEM Silicone Inlets\|BMS OCC\|FUEL IT STAGE 2\|07+ TCU Conversion\|XHP Flashtool Stage 3 Race Map\|1m Front Bumper\|CSL Wing\|Aero Rear Bumper\|DTM U Shaped LED Angel Eyes with RGB Demon Eyes\|M3 Cowl
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07-19-2017, 11:49 AM	#9
MMM335 Lieutenant 95 Rep 531 Posts Drives: 335i Join Date: Jun 2016 Location: Gold Coast, Australia iTrader: (0)	^ re-pinned TMAP sensor, no need for burgermotorsports... just repin in reverse... saves $100 __________________ 06' Space Grey 335i FBO MHD Stage 2+ e60 OTS\|VRSF V2 Catless DPs\|VRSF 7 Inch FMIC\|VRSF Charger Pipes\|Turbosmart Supersonic BOV\|K&N DCI's\|VRSF OEM Silicone Inlets\|BMS OCC\|FUEL IT STAGE 2\|07+ TCU Conversion\|XHP Flashtool Stage 3 Race Map\|1m Front Bumper\|CSL Wing\|Aero Rear Bumper\|DTM U Shaped LED Angel Eyes with RGB Demon Eyes\|M3 Cowl
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07-19-2017, 02:47 PM	#12
MMM335 Lieutenant 95 Rep 531 Posts Drives: 335i Join Date: Jun 2016 Location: Gold Coast, Australia iTrader: (0)	as you can see their clearly just switched around the plug ends lol. __________________ 06' Space Grey 335i FBO MHD Stage 2+ e60 OTS\|VRSF V2 Catless DPs\|VRSF 7 Inch FMIC\|VRSF Charger Pipes\|Turbosmart Supersonic BOV\|K&N DCI's\|VRSF OEM Silicone Inlets\|BMS OCC\|FUEL IT STAGE 2\|07+ TCU Conversion\|XHP Flashtool Stage 3 Race Map\|1m Front Bumper\|CSL Wing\|Aero Rear Bumper\|DTM U Shaped LED Angel Eyes with RGB Demon Eyes\|M3 Cowl
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07-27-2017, 05:09 AM	#13
sgm.e90 Major 45 Rep 1,185 Posts Drives: LCI F30 Join Date: Apr 2017 Location: Mid-Atlantic iTrader: (3)	MMM335 are you showing the location of where the pins go on the N20 TMAP? looks the same as OEM... __________________ 2016 BMW 340i xDrive M Sports Package, M Aerodynamics Package, M Steering Wheel, Premium, Cold Weather, HK Surround, HUD
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08-08-2017, 12:41 PM	#16
NoGuru Major 782 Rep 1,438 Posts Drives: 335is Join Date: Apr 2017 Location: MI iTrader: (0) Garage List 2021 Chevy Silverad ... [0.00] 2014 CTS [0.00] 2011 335is [0.00]	Very nice find!! __________________ 2011 335is DCT BQ Tuning / BMS CAI / VRSF kittyless DP's / Synapse BOV and charge pipe / 7" VRSF Race FMIC / Walbro 535 and 450 on BMP4 / E90 tune / Diff Brace / PR Coils / Relocation Inlets / DAW Stage3+ Turbos / MMP port injection / xHP Stage 3 / FPR and -6 fuel lines
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08-12-2017, 05:08 PM	#17
MMM335 Lieutenant 95 Rep 531 Posts Drives: 335i Join Date: Jun 2016 Location: Gold Coast, Australia iTrader: (0)	thanks it amazes lots ? __________________ 06' Space Grey 335i FBO MHD Stage 2+ e60 OTS\|VRSF V2 Catless DPs\|VRSF 7 Inch FMIC\|VRSF Charger Pipes\|Turbosmart Supersonic BOV\|K&N DCI's\|VRSF OEM Silicone Inlets\|BMS OCC\|FUEL IT STAGE 2\|07+ TCU Conversion\|XHP Flashtool Stage 3 Race Map\|1m Front Bumper\|CSL Wing\|Aero Rear Bumper\|DTM U Shaped LED Angel Eyes with RGB Demon Eyes\|M3 Cowl
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12-11-2017, 02:22 AM	#18
BMWintoxication Enlisted Member 16 Rep 37 Posts Drives: M54 Join Date: Aug 2013 Location: Shanghai iTrader: (0)	hummm needs to check if this works on my N54, n20 sensor on its way..
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12-26-2017, 10:05 PM	#19
BrazyN54 New Member 13 Rep 22 Posts Drives: E90 335i Join Date: Jun 2017 Location: NorCal iTrader: (0)	Well my 4bar tmap just took a dump. I wonder if I can use that harness and repin it for the 3.5?
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06-09-2018, 12:06 PM	#20
NoGuru Major 782 Rep 1,438 Posts Drives: 335is Join Date: Apr 2017 Location: MI iTrader: (0) Garage List 2021 Chevy Silverad ... [0.00] 2014 CTS [0.00] 2011 335is [0.00]	Just did mine since I was hooking up Flex Fuel and already right there. __________________ 2011 335is DCT BQ Tuning / BMS CAI / VRSF kittyless DP's / Synapse BOV and charge pipe / 7" VRSF Race FMIC / Walbro 535 and 450 on BMP4 / E90 tune / Diff Brace / PR Coils / Relocation Inlets / DAW Stage3+ Turbos / MMP port injection / xHP Stage 3 / FPR and -6 fuel lines
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06-11-2018, 10:52 AM	#21
NoGuru Major 782 Rep 1,438 Posts Drives: 335is Join Date: Apr 2017 Location: MI iTrader: (0) Garage List 2021 Chevy Silverad ... [0.00] 2014 CTS [0.00] 2011 335is [0.00]	Had to revert it back. Was throwing codes even after I reset them. __________________ 2011 335is DCT BQ Tuning / BMS CAI / VRSF kittyless DP's / Synapse BOV and charge pipe / 7" VRSF Race FMIC / Walbro 535 and 450 on BMP4 / E90 tune / Diff Brace / PR Coils / Relocation Inlets / DAW Stage3+ Turbos / MMP port injection / xHP Stage 3 / FPR and -6 fuel lines
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