Hello who can give me maybe a few tips, why my turbo and my charging air cooler constantly break? Now the 4th turbo and the 5th charging air cooler are in. The turbo manufacturer told me that the last turbo turned too high, the charging pressure is too high or the exhaust gas recirculation is broken. The one workshop claims that the control times are not right and the other is due to the changed software change. The exhaust gas recirculation and the charging pressure are off he OK. (both Opel workshops) The previous owner has increased the performance from 150 hp to 195 hp with a change in the software.