French Embassy Site
There is some great information on the French/US embassy site. Not sure if the link will be pulled afetr I post it, but I will try:
Here is the part on students and vehicles:
IV. Other special clearance procedures
They are available to trainees, interns, individuals sent on secondment as well as to students in French schools and colleges.
One vehicle only may be temporarily imported duty and tax free, at the following conditions:
it must have been subject, in Canada or the US, to the applicable domestic taxation (i.e. regularly licensed in those countries);
it should be only for your personal use during your stay in France;
it should not be sold, rented or otherwise disposed of in France;
you should hold a Canadian or US driver's license (and be at least 18 years old) and a valid Canadian or US insurance.
The vehicle does not have to comply with the French safety and environment standards.
The temporary admission is granted for a maximum period of twelve months (trainee, interns, seconded individuals) and for the entire duration of the studies (school or college). The application must be documented with Customs at the port of entry with the temporary employment contract, the letter of acceptance of the internship, the certificate of enrollment at school or college, where applicable.
Note: Customs will usually require the posting of a bond or another security.