Hello ,who could give me information? Did my car bmw740i have repaired before TÜV acceptance by a bmw monteure. The 2 springs rear wheel axle ,in addition both valve seals,microfilter,oil filter,oil change complete ,new ignition plugs ,oil tub seal and some hoses . All original bmw parts . Cost all in all 2000 Euro . The car got through with the TÜV and with the exhaust gas without defects . It is by the way check booklet maintained . By the way . Now the car was brought to me but with a loud fiet The assembler doesn’t know what it is and talks to each other all the time. He says it’s the converter, then he says something else now that there are a lot of problems. I, of course, as a woman, don’t know. TÜV and exhaust point confirm that the car was in top condition during the examination. When I drove the car the next day he had in cold condition an empty speed of 680 in the warm condition as well as during the examination. Since then the car has not been driven by me for 1 week. The assembler is sure that he did not make a mistake. Before, I never noticed the problems in any form. Car ran regularly without stuttering, misignition etc. switching also butter soft Was also regularly on the computer to read out errors. Do you have usable infos for me please?