My 5 year old 323 has held up very well (fingers crossed). I've had to bring it in for more minor repairs but everything was well covered by warranty. Like sharp said it won't have the reliability of some japanese makes (like Lexus and Subaru which is now #1 in reliability), but it's really not so bad. Anyways since you're buying a new car it will be warranty covered for a long time to come. Just drive it and enjoy and don't let what might happen take away from the experience of the ultimate driving machine
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best regards,
moz
2006 M Coupe, Imola Red/Black, bone stock <for now>
2000 323i, titanium silver, black interior, sport+premium package. 18x8.5 Hamann HM2