Fann þetta á BMWworld. Þarna segir að E39 523 hafi ekki fengið M52B25TU mótorinn fyrr en seinna. Hvernig get ég komist að því hvaða mótor sé í mínum?
"The M52 was an upgrade to the successful M50 engine. The M52 was produced in 2.0 (M52B20), 2.5 liter (M52B25) and 2.8 liter (M52B28) configurations. When the BMW E46 3 Series was launched in 1999, the M52TU engine was introduced in the E46 323i, E46 328i and the E39 528i models. The major changes in this Technical Update were the redesigned crankcase, modified pistons, Double VANOS for the camshaft drive, and Siemens MS42 DME system.
Later, the E39 523i was introduced with the M52B25TU engine."