Do you have the round plugs like this?
http://img167.imageshack.us/img167/1...rtesterbs3.png that is my self made oxy sensor tester, made with a kit from Jaycar Australia
https://www.youtube.com/watch?gl=DE&...e=channel_page
Here I posted the info where to buy in Australia
http://www.bimmerboard.com/forums/posts/607249
CAT. NO. KC5195 Mixture Display Kit For Fuel Injected Cars
http://wp1016621.server-he.de/fotost/f01358/06.jpg
Refer: Silicon Chip November 1995 This very simple kit will allow you to monitor the fuel mixtures being run by your car. This type of sensor is also known as an E.G.O. (exhaust, gas, oxygen) monitor. You can use it as a tuning tool, to help in vehicle modification or simply to see the behaviour of the engine control module. Indication is via 10 LEDs to show mixtures rich, lean and normal. The circuit connects to the EGO sensor mounted in the exhaust manifold and the cars battery. PCB, LEDs and components supplied.
oxy sensor plug housing 61131718057 (this part is NOT shown in the ETK, BMW internal use only)
round pin connector d 2,5 0,5 – 1,0 61131376202
http://www.ecstuning.com/Search/SiteSearch/61131376202/
oxy sensor plug housing cable loom 61131718058 (this part is NOT shown in the ETK, BMW internal use only)
round pin connector d 2,5 0,5 – 1,5 61131376191
When I ordered it from my dealer in Germany, the German spec was
Lambdasonde Steckergehäuse 61131718 057
Rundsteckhülse d 2,5 0,5 – 1,0 61131376202
Lambdasonde Steckergehäuse Kabelbaum 61131718058
Rundstecker d 2,5 0,5 – 1,5 61131376191
In case these are not the ones you are looking for, see here under plugs engine, plugs chassis
http://bmwfans.info/
http://www.ecstuning.com/Search/W211/ES164438/