sensor issues

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khanage1
Joined: Fri 29 Jul, 2016 14:54
Posts: 9

  M roadster S54

sensor issues

Post by khanage1 » Fri 26 Aug, 2016 11:28

does anyone happen to know of some site that tells you all the different names for sensors! just rang BMW to see if a e46 crank sensor fits a s54 z3m was told that the crank sensor don't exist and to find out the real name of the sensor ! also anyway of knowing when it's the rear or front lambda / oxygen sensor (been told they the same thing ) needs changing as possible solution to the stupid EML limp mode issues. so far changed maf and tps on top of engine and no joy. Pedal sensor beING changed soon too but buying bits and bobs as I go along anyway but impossible to buy without a clear reference of what fits etc as simply cant afford brand new bmw parts at present wah wahhh . dreaded po121 code keeps showing. total new comer to bmw and rather not spend 100000s trying to fix a sensor problem and happy to go at it myself most info on here already apart from some obvious things like my (probably seemingly stupid question to the pros on here).

cheers guys

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Robert T
Site Admin
Joined: Mon 12 Jun, 2006 11:35
Posts: 9999

  Z3 roadster 1.9
Location: Cheshire

Re: sensor issues

Post by Robert T » Fri 26 Aug, 2016 11:47

Look at either realoem.com or bmwfans.info. Use the last 7 digits of your VIN to select your exact model. You can then find both the names and part numbers of the sensors. If ordering from BMW, get then to lookup the part numbers and then it is their fault if they order the wrong one. Crank sensor is more usually referred to as the Crankshaft Position Sensor, but may be shown as Pulse Generator on diagrams.

I'm very wary of cheap sensors and people have had problems with both MAF and camshaft sensors.

Cheers R.

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Arctic Silver '99 Z3 1.9 & Black '59 Frogeye 1275cc
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deni2s
Joined: Mon 25 Mar, 2013 22:02
Posts: 747

  Z3 roadster 2.8

Re: sensor issues

Post by deni2s » Fri 26 Aug, 2016 11:49

Probably front lambda/o2 sensors needs to be changed. Rear ones shouldn't sent engine to limp mode.

khanage1
Joined: Fri 29 Jul, 2016 14:54
Posts: 9

  M roadster S54

Re: sensor issues

Post by khanage1 » Fri 26 Aug, 2016 21:42

thanks robert t. I'm aavoiding the unbranded Chinese ones as seem to be plenty of second hand genuine ones with warranty for sale. just got the front lambda sensors deni2 hope they solve the issue if not the the struggle continues......appears the e46 s54 m3 uses the same sensors as the s54 z3m but bmw part numbers are different was getting me very confused about it all.
cheers guys

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