Bosch Gen 4 owners.

[Beezerk]

I need a quick favour please, what sort of noise does your motor make?
I'm pretty sure mine used to make a sort of high pitched whine from new but after a very wet ride a few weeks ago I'm convinced the noise has changed, it sounds almost throaty or growly now along with the whine.
The power is still bang on and no error messages but this noise is bugging me, I could try and upload a video but I still haven't got the hang of holding my mobile phone near my feet while I'm pedalling ?

 

[Mikerb]

It could just as easily be chain noise on the chain ring.

 

[fenwick458]

well I'd say mine is definitely more of a whine, and the volume increases with cadence.
I think a video clip will get you the best feedback

 

[Zimmerframe]

it sounds almost throaty or growly now along with the whine.

Do you ride alone or with the Mrs. If the latter, have you pi55ed her off lately ?

 

[Beezerk]

It could just as easily be chain noise on the chain ring.

I'm pretty convinced it's from the motor but I need a video as suggested to be sure.
Let's says it's a worst case scenario and the motor is goosed, am I right in thinking Bosch have a 2 year warranty on the battery and motor?

 

[Beezerk]

Do you ride alone or with the Mrs. If the latter, have you pi55ed her off lately ?

I'm always pissing her off mate ?

 

[Doug Stampfer]

I'm hearing a growling from mine just recently. I'm about to take off the chain guard & see if it's rubbing.