New improved version, with advanced features! The Turbo Tuner 2 is a more advanced version of the popular Turbo Tuner, a plug-and-play solution that significantly enhances performance. Typical gains of the Turbo Tuner 2 are 40 horsepower and 50 ft-lbs of torque. Both the Turbo Tuner and Turbo Tuner 2 are easily installed -- this updated version 2 adds a user adjustment, allowing you to fine-tune the additional boost the Turbo Tuner 2 provides. This updated version also adds a wire harness extension, which allows you to locate the adjustment control in a spot of your choosing, for easier access. Dial up/down the boost as needed, in seconds. The connectors and wiring on the Turbo Tuner 2 have also been improved to provide additional strain relief on the cabling, assuring trouble-free operation over many cycles of installation and removal. There is simply no easier and less expensive way to make such drastic horsepower and torque gains on a BMW, period.

The Turbo Tuner 2, like its predecessor, can be installed or uninstalled in seconds. It does not cause any trouble codes and its operation does not leave any trace that it was ever there. The Turbo Tuner 2 is not an ECU re-flash solution. It is an embedded control solution, built using surface mount technology and state-of-the-art pick-and-place assembly equipment, that works seamlessly with the stock ECU. The turbo tuner provides real performance gains while it preserves the smooth and refined character of the car. It also features a soft limit circuit that avoids overboost, protecting the engine from boost spikes and preserving drivability. A temperature compensation protection circuit lowers boost at elevated under-hood temperatures for further protection. No special tools or expertise required, and full instructions and support are provided.

The internal setting is accessed by removing two screws and the cover on the back of the unit. The setting adjusts the additional boost over stock. With a setting of 100 the unit will request an increase of 4 psi over stock. The actual boost will depend on several factors including the octane of the fuel. On the later model years a 2D25 manipulation prevention code can be set if the setting is too high. It is a good idea to check with a scan tool to make sure that code is not being stored. Turn down the setting if necessary.


Download and view complete installation instructions here:
Installation instructions for 135i
Installation instructions for 335i & 335xi


This item fits the following BMWs:
2008-2010 E82 BMW 135i
2006-2010 E90 BMW 335i 335xi 335i xDrive
2007-2010 E92 BMW 335i 335is 335xi 335i xDrive
2007-2010 E93 BMW 335i
2004-2010 E60 BMW 535i 535xi 535i xDrive