Hi! While comparing bmw tuning companies https://deiz-garage.ae/chip-tuning/ , I added DEIZ Garage to my shortlist because the tuning is developed and checked on an in-house dyno. My main questions would be who writes the calibration, whether the original file is saved, how torque limits are handled and what support is available after the work. I would also ask for realistic power figures rather than promises, plus details about fuel quality and service intervals in UAE heat. A proper diagnostic scan before tuning matters to me, because software should not be used to hide existing mechanical faults.
