Hi nebrog23, yes that's the water pump and it should turn on immediately upon the Webasto firing, or when the ignition key is in the "on" position and you've got the interior fan on.  The pump is easy to replace, it's behind the left-side headlight and down a bit.  It helps to have a hose ...

Hi guys, I have a 2005 euro-spec E53 3.0d that has the auxiliary heating layout, and have managed to get it to work as an independent heater - so I thought I would share how I did so. My car's layout is like the top one that jaynana refers to below - it does NOT have the water shut-off valve (part #...

I got this sorted in the end. I was provided with a copy of the v50.2 daten files, which had the necessary flash data files I've referred to above.  The end result was the same though, the ECU would refuse to be flashed in WinKFP. In desperation, I went to see my auto electrician mate, who has a GT1...

Hi all, I've managed to brick my trans ecu when trying to flash the v46.3 daten to it using Winkfp 5.1 in comfort mode. I need to use Winkfp in expert mode to fix it, but both the v46.3 and v41 daten files that I have are missing the program, data and naab files (which have the file extensions .PAF ...

Hi all, Kieran here from NZ.  I recently bought a sapphire black 2005 E53 3.0d with the sportpac and pan roof options, as I wanted a better tow vehicle for my rally car than my now-departed  Nissan Pathfinder.  When comparing the price of the E53's against other urban assault vehicles in the same pr...