Page created to cleanup specs
Note that if ECU is manufactured to specs, but the specs is wrong, it will not work. Sectrig=HALL (cam), we can agree on that... However, even after several "we are sure emails", primary trigger=HALL is specified which we think is wrong. On single-Vanos M50 engines (also considering the more detailed info) cranksensor should be VR.
- 3 pins: correct (but that can be either VR or HALL)
- according to our information, crankshaft=VR , connected as primary trigger (traditionally "EC36/27" in VEMS, mot88/pin16 on the M50 Vanos type mainboard)
- please confirm crankshaft=VR.
- motronic88 connector pins: resistance between 16 and 43 (or in engine bay with sensor connector disconnected)
- Preferrably by DVM measurement: if you find 2 pins that measures same resistance in both directions (usually between 300 and 1400 Ohm) that is VR. Otherwise HALL.
Probably wrong info below, saying crankshaft=HALL (info mounting in emails before this page was created)
M50B25TU 141 kW (189 hp) @ 5900 245 N·m (181 lb·ft) @ 4200 6500 84 mm (3.3 in) 75 mm (3.0 in) 10.5 1993
3 PIN Hallsensor Crankshaft (editors note: 3 pin is correct, but "HALL" must be wrong)
we are sure - Motorcode M50 S256S2, with single Vanos - Hallsensor Crankshaft with 3 pins (editors note: 3 pin is correct, but "HALL" must be wrong)
The partsnumber of the original ECU is Bosch 0 261 200 413
Identifikationnumber of the BMW is WBACB31060FD7.... (last 4 digits removed)
M50 single vanos is 100% VR crank, Hall cam.
BMW ETM shows the very clear VR and HALL symbols for the sensors.
According to Bentley manual and personal experience, the crank sensor BMW M50BXX engines is VR.
- For Bosch DME M1.7 Crank:VR, Cam:VR
- For Bosch DME M3.1 Crank:VR, Cam:VR
- For Bosch DME M3.3.1 Crank:VR, Cam:HALL
- For Bosch DME M5.2 Crank:VR, Cam:HALL
The crank sensor BMW M52BXX engines is HALL.
- For Siemens MS 41.1 Crank:HALL, CAM: sort of VR
- This latest Siemens CAM sensor however is far from standard, cannot be used with aftermarket ECUs