Oh and btw.. now I know what you were referring to... the newer N53 motor... we have also solved the puzzle of the insurance ladies question about power.
The N53B30-O0 has improved maximum power to 272 bhp (203 kW) as well as maximum torque over the N52B30. The N53B30-O0 can be found in the 330i (E90/E91/E92/E93).
So to answer her question when you call back... no you dont want the insurance for the 272hp variant (because thats the N53).... you want the other option - which we now know in their world equals the N52.
..sweet torquin' diesel!