FYI There is a updated oil dipstick guide tube which has a larger drain port that reduces the potential for clogging. It is part number 11437563831. Here's a link for reference.


FWIW On the M54 another approach to replacing the CCV is to remove the alternator and the oil filter housing. That gives you plenty of access to the CCV by reaching under the intake manifold. The side benefit of this method is that you can replace the oil filter housing gasket which eventually fails and leaks oil. You can replace the drive belts if they are old. You can also replace the clamps on the power steering reservoir too if they are leaking.