Originally Posted by 135i_vs_
The CPO 335d I just purchased, I noticed the intake manifold was replaced by the dealer, along with the fuel injectors right before they advertised it for sale.
How many miles on your d? I'm not certain there is a correlation between miles and carbon buildup (it might be more related to driving style/situation), but OTOH it will at least be another data point. Welcome to the d side!