here in Australia I know a few people have put on DPchips and they declared immediate performance gain.

mine 2004 x5 MY05 3.0D sport has almost 70000km on the clock. the engine is loud when the turbo is pushed running, but the over all performance is excellent with about 9L/100 km for city driving. there was a gasket problem which led to minor oil leak, but was easily fixed.

very happy x5 3.0D owner.

one complaint, the sport suspension is very stiff!!!

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X5 E53 MY05 3.0D Sport