To raise a point on this , i have known single injectors go down but to get all 4 at same time seems a little strange , would have appriciated to know how many miles car had done and a bit more info on service history . but for it not to start at all is pointing me to look further afield as to why it would not start , i know the AA are pretty good but when it comes to diagnostics on pugs they are not experts on that make just as most main dealers are . sometimes they will just throw parts at it hoping they cure the problem and of course charge you well for it . think i would have asked if it does not work are they prepared to refund my costs ? that usually makes them splutter a bit and sometimes have a re-think ! but yes i agree with one poster i do think they are getting the originals "reconned " and charging you for new , when diagnostics are done as one poster says each injector has it own id so would have liked a print out of before and after to see if IDs have changed !