In Reply to: 323i Sport in the rain posted by Adam V on October 18, 1999 at 13:56:28:
Most likely tires. Which tires came with your car? My sport package came with Conti Sport Contacts which I would say are very good rain tires. (I don't have any problems with my 328.) Is this your first car with 225 width tires? Wider tire(and some summer tires) are more likely to hydroplane.
As far as wipers. Don't think anyone makes aftermarket wipers for the E46. I might be wrong, but don't you have to replace the whole blade, and not just the rubber. I don't know for sure. Maybe there is something defective in your wipers? My E46 has the best wipers of any car I've ever driven, except for the fact that the 'high' setting isn't fast enough.