Car & Driver got 4.9s for the 2009 335i sedan manual, and 5.3s for the 2012 335i sedan manual.
"As for the numbers, the 335i proved marginally slower than expected in testing. It needed 5.3 seconds to reach 60 mph instead of something in the high fours, as we’ve recorded with previous 335s."
http://www.caranddriver.com/reviews/...an-test-review
http://www.caranddriver.com/comparis...mw-335i-page-2