Window regulators - Looks like they are an inherent weak spot

Just this afternoon having put the roof back up, the passenger window stopped half way up making exactly the same noise the drivers side made 6 months ago when the regulator failed. Fortunately this time I was able to coax the window back up and have sourced a new one from Mazda at half the price Fiat quoted and in stock rather than a 2 week wait with Fiat.

In conversation with Mazda's parts man, he confirmed that water ingress causes internal corrosion and results in regulator failure. My car is coming up to 7 years old, with both regulators failing within 6 months of each other. I had noticed the passenger window going slow over the last few weeks, so if you notice the same It may be worth changing the regulator (part costs £45 from Mazda) before it fails and leaves you with a window you can't close.