NOXEM 129 NOx sensor emulator



11787587129 alternative

NOx Sensor / emulator



Bottom of car, passenger side, access form the car’s bottom



BMW | E60 LCI, E61 LCI with N53 and N43 series petrol engine

BMW | E63 LCI, E64 LCI, E90, E90 LCI, E91, E91 LCI, E92, E92 LCI, E93, E93 LCI with N53 series petrol engine



11787587129 (actual release)








Following NOx sensor error messages:

2AEC Nitrogen Oxide Sensor Self Diagnostics

2AF0; 2B05 nitric oxide sensor, heating

2AF2; 2B06; 2B09 nitric oxide sensor, Lambda linear

2AF4; 2B07; 2B0A NOx sensor, electrical

2AF6; 2AFB; 2B0B nitric oxide sensor, Lambda binary

2AF9 nox sensor, nox signal: coast mode check

2EAE NOx sensor message missing (timeout)

30D6 nitric oxide sensor, plausibility

30D8 NOx sensor, Sensor damaged

30DA NOx sensor, heating time

30DC nitric oxide sensor, heating

30DE NOx sensor – Lambdaprobe before catalyst, Korrelation

30E0 NOx sensor, Offset

30E2 nitric oxide sensor, thrust test

30E4 nitric oxide sensor, aging

30E6 nitric oxide sensor, dynamics


Following NOx catalytic converter error messages:

30E9 nitric oxide catalytic converter, aging

30EA nitric oxide catalytic converter, sulphurized*

*if an error appears repeatedly and/or forced desulfurization is not possible/successful


Following diagnostics live data:

NOx concentration is 0 ppm**

(INPA data | NOx Sensor / Exhaust temperature menu) after:

  • the engine is warmed up
  • exhaust temperature is more than 220 oC
  • driving speed exceeds 20 km/h for more than 2 min

**continuously or periodically: the sensor is damaged

  • Rough idle (cold and/or hot engine)
  • Uneven run at mid/high loads
  • Misfires and error messages about misfires
  • Error messages about cylinder’s and/or bank’s fuel trim
  • Problems with cold engine start
  • Increased fuel consumption




  • Restores normal operation of NOx system and fuel economy
  • DOES NOT require NOx catalytic converter replacement
  • Restores creation of cylinders individual and bank fuel adaptations for idle, mid/high loads, cold engine – smooth operation at all conditions
  • Restores Stratified charge and Homogeneous lean fuel injection modes, regeneration, and desulfation of NOx catalytic converter
  • Increased lifetime: average more than 300’000 km


Installation of NOXEM 129. Introduction

Installation of NOXEM 129. Part 1

Installation of NOXEM 129. Part 2



Affected vehicles




NOXEM series NOx emulator is built using the highest quality components

  • Bosch’s latest-generation sensor, controlled and measured by ourselves developed analog control module provides the highest accuracy of exhaust Lambda value. Now you can use NOx emulator Lambda data as reference
  • Up to 30V overvoltage and wrong supply polarity protection guarantee highest resistance to cars on-board voltage spikes
  • High precision reference frequency oscillator and industrial temperature grade components provide uninterruptible operation in a wide temperature range
  • High power oversized sensor control stage reduce heating and facilitate the operation of the electronics module at high temperatures
  • Double sealed construction with 5mm stainless steel base plate is a guaranty of long and safe operation in hard environment conditions

Electrical characteristics

  • Power supply: +9.0 .. +16.0V DC
  • Long-term over-voltage (1 hour): +24.0V DC
  • Short-term over-voltage (1 second): +30.0V DC
  • Wrong polarity short-term over-voltage (1 second): -30.0V DC
  • Maximal current consumption (+14.0V DC; +25oC): 2.5A
  • Average current consumption (+14.0V DC; +25oC): 0.8A
  • Operation temperature: -40oC .. +105oC

Attention! While using NOXEM 129 or NOXEM 130 NOx sensor emulator, the NOx level, emitted by the engine in some modes can differ from value, specified by the manufacturer. The user of the product assumes full responsibility for compliance with emission standards, valid in the country of use.

NOXEM restores the normal performance of the NOx system, which is one of the main conditions for correct engine performance. Affirmation for the successful performance of NOXEM – no new error messages regarding NOx sensor in the memory of MSD80/MSD81. However, NOXEM does not guarantee the excellent performance of the engine, if the engine has others, not related to NOx system, defects and/or the required coding procedures, as described here and here, after installing NOXEM are not performed correctly/not performed at all. If you have doubts, that your choice to buy NOXEM, is correct, please, get in touch with Bimmerprofs via e-mail and include an exact description of your problem: screenshots of the INPA error message list, live data, etc.
Bimmerprofs offers help with online diagnostics for customers. Please, get in touch with us for more information.

FAQ about NOXEM series NOx emulator

Detailed information about NOx system problems

How to check the condition of NOx system