There were a number of automatic transmission problems in the past, but they've been pretty limited on the E90 series. The biggest one I've seen is the leaking mechatronic sleeve issue, which is an expensive repair if out of warranty, but it only applies to the ZF automatic transmissions, and those are only in the 335. The manual transmissions have sounded pretty solid.
So with regards to a 2007 328xi. I don't know of any significant manual transmission issues that I would be worried about. As always, your mileage may vary.
2015 M235xi coupe, Black Sapphire Metallic, Black Leather, Fineline Stream trim, Steptronic, xDrive, ZPP, ZTP, ZCW, ZDA, ZDB, 5DP, hk w/ BimmerTech amp, Enh. BT
Ordered 3/12/15, Off the line 4/7/15, Delivered 5/14/15
Prior 40 years of cars: 1967 BelAir wagon / 1968 LeMans Tempest / 1970 Mustang Mach 1 / 1972 El Dorado / 1978 Corvette / 1981 Subaru GL wagon 4WD / 1983 s10 Blazer 4x4 / 1985 Bronco 4x4 / 1996 Bronco 4x4 / 2004 Passat 4motion / 2009 BMW 335i xDrive E92
Last edited by Zooks527; 01-19-2013 at 11:03 AM.