Hello all I'm Mark I have 2003 mini Cooper 5 speed and I developed a knock slash tap so I went on the forms and found that it's a like some type of manifold backfire I guess so it to replace the up and down stream 02 sensors and the camshaft sensor and the problem has gotten a lot better so I'm just wondering were I could go next. Should I go with the MAF/MAP sensor or the knock sensor video abalone on request. Side note I'm currently doing a battery reset for the control modules. Thanks all for the help in advanced hope to here from all of you soon