I have a 04 E53 3.0 Diesel. The gear change is not the smoothest around town. I live in London but I have learnt to live with it. The management system when going down a hill and I am braking, the the engine decides to apply engine braking also! I find this annoying. Yes it saves the brakes and the x5 is a big heavy car... but the sudden jolt then high revs from the rpm range annoys me a bit. I would much prefer it if it was much more sophisticated in terms of pressure applied to brakes and the desent of the hill rather than it just going crazy at the sight of every hill.

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BMW X5 E53 3.0 Diesel Sport | Sapphire Black Dakota Beige Leather interior | Year 2004

What I had updated
Carbon Effect Steering Wheel
Panoramic Sunroof Fix
PVC Replacement
All glowplugs and glowplug regulator
New discs and pads all round
All new front suspension links, bushes and rods