MY 03/08 E92 M with pullies / test pipes / air filter / Stage II tune.
I had issues with my Throttle Valve Actuators and got them replaced under warranty (though had to pay a deductible). Now I have some O2 sensor faults (known to be problematic sometimes) so I just want some help deciphering which ones I need to replace. Here are the codes:
27C7 - Lambda sensor trim control AD diagnostic bank 2
2771 - Lambda sensor dynamic diagnostic VKAT bank 1
From my understanding:
VKAT = VOR (before) Cat
NKAT = NACH (after) Cat
bank 2 = drivers side
bank 1 = passenger side
So it looks like I should replace both before Cat 02 Sensors. Just want some concurence prior to buying the following 02 sensors:
http://www.amazon.com/Bosch-17039-Ox.../dp/B000JZEXG8
Thanks for the reassurance!