Front window regulator DIY

hi,

i hope someone can help/guide me.

my driver side front and rear window regulator cables broke and i bought new regulators from ebay; instead of fixing them myself took them to a local garage as didn’t have the tools and was not very confident doing it myself.

the garage installed both the regulators but they do not seem to be working perfectly, the front one seems to make squeaking noise when windows is rolled up or down, some times its more sometimes less. Upon careful further inspection I saw that both the windows whose regulators have been changed and not fully rolling down and stay a about a inch outwards, please see the pictures attached.





Took the car back to the garage and they said that this might be happening due to the windows regulators not being original BMW, they said there are no adjustments that can be done so if they hadn’t installed it properly it won’t be working.

I then contacted the supplier and he confirmed that they sell hundreds of these every year and never had any problems, they said it must be occurring due to the glass runners not being greased properly and as a result the glass is making squeaking noise and not going fully down. They said they even include a note with the regulators to instruct the fitters that they must grease properly and I did check that note was indeed there. I also checked supplier reviews on ebay has indeed sold many of these regulators and havent got a single negative review about their suitability.

So went back to the garage and now they are saying that they can open the whole door again, clean everything and then put back again but no guarantee; they also want to charge another £30 for doing so even though they charged £110 initially.

I am not sure who is right, can anyone guide me on this. Do you think it’s a fitting/greasing issue? What shall I do?

Thank you very much for your help!