Hi all , new to the forum , need to figer out where and how to post . just wondering if someone knows the answer to my question. I've got a 2.7 SE diesel s-type 05 registration , i;ve got a problem with the mass air flow sensor bank B . Now , there are 2 pipes going into the air filter (not good with mechanics) , so there are 2 sensors , how would i know which one is block A and which one is block B so i can replace it . One pipe is on top , the other one is underneath , they join together and go into where the air filter is . Tried to explain as well as i could ( rubbish at mecanics :D ) Thanks guys ..