The problem: A portion of 2007-08 X3s built between 9/2006 and 11/2007 my have possible faulty transmission software programming. This affects X3s equipped with the 6-speed automatic gearbox. The gearbox may fail to respond to throttle inputs, fail to engage a lower gear, or downshift very roughly in normal Drive mode. The problem is not exhibited in manual mode. Cold temperatures may or may not make the shifting quality worse.