Gent bought the car in January.Three weeks ago the
n/s window would go down whilst driving to work, more
or less after the same distance and would do the same driving home. After a week he then found the window would open whilst parked and locked over night.

Check for fault codes on CIM.No codes.Took door card off and disconnected harness on A pillar,No
bared wires found.A regulator/motor has been fitted
but before his ownership.We have not witnessed the
fault.

Has anyone experienced this.Strange to o/s does open
at the same time

I would bet a pound to a pinch of salt the regulator/motor that has been fitted is a crap ECP component, Seen funny things with the rubbish they supply !

Having disconnected n/s window switch,fault occurred, we noticed after parked in sunlight.
re-connected switch. Disconnected master switch on
o/s. Fault occurred again. Had both door switches
disconnected. Fault still occurred. Parked the car in shade. No fault.

Replace window motor and regulator(Valeo)
Fault not occurred at all. The unit we took out was made by PMM. Thermal coupling through door to motor
must have caused a circuit to bridge.

So, a crap part supplied from ECP yet again, rest my case in not buying even a bolt from them