DINANTRONICS Performance Tuner Stage 1 for F25/26 D440-1638X-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

76 @ 5000 RPM

Max Torque Gain

80 @ 5000 RPM

Peak Horsepower

360 @ 5500 RPM

BMW Factory Rated HP

300 (303 Measured)

BMW Factory Rated Torque

300 (331 Measured)

Included Notes

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

California Restricted



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2011 - 2017BMWX3 35i xDrive (F25)3.0L L6
2015 - 2016BMWX4 35i xDrive (F26)3.0L L6