Sensor Inputs

MS41.3 supports customizing a few sensor inputs that may no longer be needed:

(2) Downstream Oxygen Sensors

(2) Upstream Oxygen Sensors

(1) Fuel Tank Pressure Sensor

Aftermarket sensors that have a linear output from 0-5 Volts can be installed in place of the stock sensors. Their slope/offset values can be set to display the full ranges at the resolutions mentioned below for each.

Recommendations -

Wideband O2 - https://www.14point7.com/products/spartan-lambda-controller-2

Wideband Sensor Reliability - https://www.nzefi.com/bosch-lsu-wide-band-airfuel-ratio-lambda-sensors-fail-often-aftermarket-performance-applications/

MAP sensor - https://www.aemelectronics.com/products/sensors-connectors-accessories/map-pressure-sensors/stainless-steel-map-psia-sensors

FlexFuel - https://www.ibuildracecars.com/store/flexfuel

A Plug and Play harness that integrates these additional sensors can be made using the following schematic.

MS41.1/MS41.2 ECU Hardware supports four (4) sensors as shown below plus an additional one (1) if removing the Fuel Tank Pressure Sensor.
MS41.0 ECU Hardware only supports two (2) sensors which can be any combination of the ones shown below.

Here is the prototype I made that is running my car to this day. It has Wideband O2, MAP, and Fluid Pressure integrated with extra pins available for FlexFuel to be added later.

Here are the OEM and Specialty plugs you need to make your own version per the schematic above.

TPS Receptacle - https://www.bmotorsports.com/shop/product_info.php/manufacturers_id/1/products_id/2163
TPS Plug - https://www.bmotorsports.com/shop/product_info.php/products_id/3412
O2 Sensor Plug -
1. https://www.fcpeuro.com/products/bmw-plug-housing-12521740485
2. https://www.turnermotorsport.com/p-40358-12521740485-genuine-bmw-part/
Deutsch 12 Pin Bussed (6) Receptacle, A Key -
1. https://www.buydeutsch.com/products/dt04-12pa-p026
2. https://www.amphenol-sine.com/AT04-12PA-P026-12-way-receptacle-2-6-pin-busbar39-amps-nickel-plating-keyed-A-grey-Comparable-to-PN-DT04-12PA-P026_p_8988.html
Deutsch 12 Pin Plug, A Key -
1. https://www.te.com/usa-en/product-DT06-12SA.html
2. https://www.amphenol-sine.com/AT06-12SA-12-Way-Plug-Female-A-Position-KeyComparable-to-PN-DT06-12SA-DT06-12SA-P012DT06-12SA-B016_p_148.html

If you would rather buy a pre-assembled Plug and Play harness per the schematic above, and are willing to pay a premium, I can make one for you. Send an email to MS41.3.FAQ@gmail.com to discuss further. Here the options :

Wideband O2 + MAP
Wideband O2 + FlexFuel
Wideband O2 + FlexFuel + MAP + Oil/Fuel Pressure