door carrier handle carrier OEM or not?

[omodos]

ok , not posted for ages due to personal reasons, but the x5 never ceases to throw things at me, drivers side door handle carrier went yesterday , changed both sides hmmm 6 years ago so that is pants especially as i bought the OEM...
this time bought febi replacement so will see how that fares, and am even thinking of buying the dead cheopo aftermarket....for the passenger side...

How bad can they be? i mean 6 years is poor life expectancy for the door handle....especially as i dont use the car eveyday! anyone had an experience with the much cheaper aftermarkets?hasnt bmw acknowledged to poor design.... and use of what seems to be a brittle alloy that just cracks or has bits falling off it. Am in a right mind to kick up a stink, but i guess they will just say wear and tear consumable , like a battery or tire!