Hello BMW friends, I am very interested in buying a BMW 650i. That the 408 hp engine is garbage, you read and hear everywhere. The 449 hp engine is described more or less as reliable. However, there are also strikingly many with replacement engine on offer and also many that have been overhauled. Are there also with the abnormality? Is this also vulnerable? Is there anyone who knows about it and can recommend what? (year of construction)? In addition, there are some with 449 hp a and others with 450hp. I like the car visually very much. But I don’t want to get any potential engine damage. Thanks already