The BMW M54 engine which is featured in a number of 6-cylinder Bimmers from the late 90s through 2000s has one fickle part called the DISA valve. Check out this Tech Tip with @garethfoley to learn how it fails and what to look out for. ➖➖➖➖➖➖➖➖ #fcpeuro #techtip #diy #tips #bmwe46 #e46 #bmwm54 #cartips