Hissing noice in Xtrail Hybrid when switching from EV to Engine mode

[Xtrail]

Hi All,

Can any of you kindly advise and suggest a remediation to fix the hissing noise of the X-trail Hybrid version SUV taking place at the switch from EV to Engine mode? I have tried changing the CVT oil after well with in less than 16000Kms on the clock but still the problem persists. It comes up after driven for about 10-15 mins and does not come at all the time when the EV to engine switch over takes place. Every one says it is a gearbox failure noise but still the vehicle is running strong.  i Have also updated the IOS version of the CVT controlling software with the help of Warranty extending party but still the noise is thee. When i quarried the agents and Warranty extending party about this issue, they keeps on pestering that it is normal for this model and most of the Hybrid SUVs including Outlander and Vezel. Is that true? Local Gear box fixing guys are also not providing a solid answer as every one wants to end this problem by making some one else. IS it actually a problem or some thing just to leave it without worrying? has anyone done any R& D on this?

Many thanks in advance

Edited March 7, 2018 by Xtrail