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Discussion Starter #1 (Edited)
Was wondering if anyone can shed some light as to the differences are between the E90 325d and the 330d ??? Is it just the ECU or is there more to it, ie gearbox, injectors, fuel pump, turbo etc ??? I know both have the same 6 cylinder 3litre engine.
 

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From what the dealer / google told me there is a small turbo on the 325d, a big one on the 330d, and a twin turbo on the 335d. The inline 6 is the same block though.

Each would have various components in it which would make them slightly different such as fuel pump and ecu programming on top of the turbo. From what I've heard the 'real world' fuel econ is about the same on the 325 versus the 330 while the BHP is much different, which is probably why so few are sold.
 
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