JB Diesel Tuner and CAN Tool for the 2006+ BMW 320d, 330d, 335d and X5d. Recently sold my X5d, so I don't have a need for this anymore. It worked great and is a "night and day" difference from stock!
From the manufacturer:
Gain up to 60+ horsepower and up to 100+ torque to the wheels by simply adding the JB Diesel (JBD) with no other modifications. In addition to power and torque gains throttle response is dramatically improved making your juiced BMW much more fun to drive. Simple plug and play installation and does not hurt fuel economy during normal driving.
The optional CAN Tool lets you read and delete potential hidden codes right from the OBDII port inside the car and is suggested for those under factory warranty.