DINANTRONICS Performance Tuner Stage 1 for M235i (D440-1641-ST1)


The DINANTRONICS™ Performance Tuner is a highly engineered and sophisticated piece of computer hardware and software that enhances engine performance, without negating or voiding your new car warranty coverage and without affecting long term reliability or the functionality of on-board diagnostic systems. It is also the only tuning device emissions legal in all 50 states. The ultimate objective of developing this piece of technology was to provide the ability to control every signal entering and exiting the BMW factory Engine Control Unit. These items are unique to Dinan and together they embody the apex of performance engineering in a powerful, reliable, and warrantied package.


Additional information

Weight5 lbs
Dimensions14 × 10 × 10 in
Installation Hours


Max HP Gain

38 @ 5000 RPM

Max Torque Gain

59 @ 3000 RPM

Peak Horsepower

364 @ 5500 RPM

Peak Torque

430 @ 3000 RPM

BMW Factory Rated HP

320 (326 Measured)

BMW Factory Rated Torque

330 (379 Measured)

Included Notes

DINANTRONICS Performance Tuner, Dinan wiring harness, Dinan Stage 1 software

California Restricted



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2014 - 2016BMWM235i (F22)3.0L L6
2014 - 2016BMWM235i xDrive (F22)3.0L L6
2015 - 2016BMWM235i (F23)3.0L L6
2015 - 2016BMWM235i xDrive (F23)3.0L L6