Lambda sensors

Zonder

Member
 Manchester
I am trying to locate the parts to replace the lambda sensors and the positions to fit. I have been looking at this page on the OEM parts site

http://www.realoem.com/bmw/enUS/showparts?id=DU53-USA-01-2006-E86-BMW-Z4_30si&diagId=18_0652

Do I need 4 sensors? I find the picture a little confusing :) guess I need to compare to the engine but can't get near car atm.
 
It coded on the MAF so I cleaned that and it reset. A couple of weeks later it coded again but on the oxygen sensor can't remember the code off the top of my head but it's cylinders 4-6 though. I checked the readings and its not stable on the graph.

So it's the regulator sensors that probably need changing?
 
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