[Dmitry at Pelican Parts]

Hello and welcome to the forum! Take a look at the link below to one of our site's DIY tech articles on the R56 MAF sensor. Hope this helps you troubleshoot. Please let us know if you have any questions or if we can assist with any future part needs.

https://www.pelicanparts.com/techarticles/MINI_R56/25-FUEL-Cooper_Mass_Air_Flow_Sensor_Replacement/25-FUEL-Cooper_Mass_Air_Flow_Sensor_Replacement.htm