One problem related to front suspension wheel bearing has been reported for the 2003 Ford Focus. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Ford Focus based on all problems reported for the 2003 Focus.
My 2003 Ford Focus se started to shake, pull hard to the right starting around 50 mph, takes bumps hard and back-end sways. It only has 36,000 miles on it. Dealer says the left rear knuckle assembly and wheel bearing need to be replaced, that it was "bent" and I must've hit something with it. This is just not true. 2000 Focus had a similar problem. I think a bolt came loose, weakening the assembly and allowing it to bend through normal use.