Also if you look at e46zone in the UK you will find loads of info. There are several 330Cd and 330d owners there with both types of engines who have had similar issues to me.

The most common issues on mapped cars is the CV Joint and the Flywheel/Torque Inverter.

For every car you need to check if it's vacuum controlled or electronic. Vacuum ones don't have so many issues. The electronic ones are far superior, however the actuators fail and are very difficult to source and BMW will make you buy a new turbo or inlet manifold to get the actuator (my boost issue was the electronic swirl flap actuator.)

On the plus side they are stunning machines and have addicting torque, revvy engines.


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