Pardon me if this has already been discussed. I have a P0171 code on my 2007 E63 and want to proactively replace the mass air flow sensors before I seek professional help, and see if that clears things up. I have searched the net and can not find a parts supplier who carries these. Can anyone give a recommendation? Thanks.

2011 R8 5.2
2007 E63
2002 996TT

 

An update. Cleaned sensors and after a few days the CEL shut off. So for the time being no new sensors are needed.

 

the mass air flow sensors for that motor dont really go bad. you've most likely got some sort of vacuum leak, possible intake manifold gaskets, manifold itself or loose hose/connection/fitting