<prompt> Human: Edit. Its a 2003 bmw m3, its definitely a loss money wise but the car hold significant sentimental value to my family  <response>: Oh boy. I have imported dozens and dozens of cars from Europe and even a few that I had to federalize.If the car was originally sold in the USA or Canada and subsequently exported to Europe then this is actually rather easy And believe it or not there are a lot fo US Spec European cars running around Europe. If not, read on.An M3 wont be impossible as the M3 was sold here and both the US and Euro cars use the same basic S54 engine and if its an SMG or a stick, not to worry as BMW NA federalized both drivetrains. This car can be federalized under substantially similar to a pre-existing US model. You will have to go through a registered importer whos registered with NHTSA and licensed to do so. Probably someone like JK Technologies in Maryland.. I have used them and Wallace Lab in Texas.Realistically, youll need to change most exterior lights to US spec, fit a few buzzers, an 02 should be EOBD so you shouldnt need to retrofit it to OBD2, youll need to change some labels and get the car past an EPA test. Realistically you should budget for a major service including valve adjustment, pray that the engine is healthy, budget for a brand new set of O2 sensors and a US-Spec catalytic convertor and the car should pass the test fine.Note, this is a MUCH more stringent test than a state inspection.Figure the above is 10K when all is said and done, a couple grand for shipping... its doable.The 2001 M3 is not on the list but the 2001 3 series is so that should blanket cover the M3, read the federal docket files and youll see what had to be petitioned to make the cars eligible for import. 