I have heard that most BMW 7 series 3.0D and LD have timing chain problems or gear box problems. All most all 7 series around year 2008, 2009, 10 have their timing chain broken or have gear box problems after around 70000 miles. According to BMW their timing chain don't need to be changed until the engine lasts. In other words no need to change it at all.
Does any one know the real reason why this is happening? Has BMW sorted this problem??
Obviously couldn't get a straight forward answer from BMW.