BMW

[Petsie]

What size of drive belt fits a BMW 3 series compact 2003. Model 318 TI SE compact auto.

[Plate spinner]

Not sure, but I'd call a BMW dealer parts desk and ask / order.

[SebringMan]

Are you changing it yourself?

If so, take the belt off and read the numbers off as per this thread:

https://www.pistonheads.com/gassing/topic.asp?h=0&...

Otherwise Ask BMW. I doubt they would give up the correct size that easily. BMW belts are ContiTech items, so a belt from ECP should be a similar or the same size with any luck .