Good day, after a callback campaign from KBA (technical action battery plus cable) my vehicle had to go to the dealer in order to have an additional battery cable installed there. The description of the KBA: Error in plug connection of the battery plus cable can lead to the failure of the vehicle electrics and the engine. I have my BMW 5 years and never had any problems. One day after the repair at the dealer dealer, my BMW stopped at the first ride out of the underground garage. the description above. How can this be? After a fault diagnosis it probably came out that the exhaust gas return device is defective, new price approx. 200,00 €. Who believes it will be soulful. What would you cause? It is obvious that the problem only came about as a result of the repair. Here there is a safety risk that has arisen, I could no longer steer the vehicle!