How much is Flashpro cost? if it is just to turn off the sensor, isn't it expensive solution?

 

bag, seat belt retractors, srs module at a minimum.

i'm not sure if the s2000 has them, but the honda fits in the same generation also had little gyroscope / motion sensor things that needed replacing. a friend had one that hit a curb and i helped him replace his bag. the reason the bag went off was because the sensor that detects a collision tripped even though there was no collision. i've heard it happening for multiple people hitting curbs in their fits (the curtain bag goes off).

i'm not sure what the s2000 has to tell the car that there has been an impact, but i would make sure you replace that as well. maybe billman or someone with more knowledge than me can chime in regarding if those sensors are on the car and where they would be. possible they're integrated into the control unit, but on the fit they were not iirc