I have a problem with my drivers door where the door doesn't lock via the central locking.

When the button on the key fob is pushed you can here the actuator move but it goes back to it's original position (see video).

Now this obviously points towards a faulty actuator but I have now bought two second hand ones and I get the exact same response from those as I did my original one!!

Am i just incredibly unlucky and bought two actuators with the same fault as my original one or is there another cause of this problem?

Video: http://img802.imageshack.us/img802/5...ilddmozvex.mp4

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2009 E70 X5 35d M-Sport
Black Sapphire / Tan Leather - LCI Tail Lights

Sold - E53 X5 3.0d Sport
Black Sapphire / Black Leather - OEM 214 type alloys - Wheel Arch Extension Kit - Depo A/E Headlights - 55w HID's - LED Tails - M3 S/Wheel - Black Kidneys - LED Int Lights.

Sold - E53 X5 4.4i Sport