BMW Aluminum Panniers - lock cylinder keeps falling out

So I'm getting frustrated because I'm now on my third lock cylinder for my left pannier. The cylinders spin in their "sockets" more than I'd expect, and the one on the front side of the left pannier spins to the point that the lock plate pops out. When the lock barrel is inserted the key slot is vertical... to unlock the mechanism the key must turn clockwise, and should stop at 1/4 turn. The problem is that there's just enough wiggle room to get a bit past that 1/4 turn, and then the lock plate and spring disengage and the whole shootin' match falls apart... and it happens when I'm on the road, so the part is lost, plus it becomes a hazard for those behind me... and I'm now on my third cylinder. Has anyone had to fix this, and how did you do it? Any help would be appreciated! Thanks in advance, Sandy

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Hmmm... looks like I'm alone here with this problem based on the view to reply ratio. Here's what I'm doing for now - I'm just making sure that when I ride the pannier is in the unlocked position - that way the lock plate is facing upwards and engaged. When I stop I can either leave the case unlocked, or I am very careful not to turn the key past the 3 O'clock position, which is where the cylinder falls out. The next step will be to replace the black plastic latch. Next time I'm near the dealership I'll pop in to price the part and decide from there.

Sandarm said:

Hmmm... looks like I'm alone here with this problem based on the view to reply ratio. Here's what I'm doing for now - I'm just making sure that when I ride the pannier is in the unlocked position - that way the lock plate is facing upwards and engaged. When I stop I can either leave the case unlocked, or I am very careful not to turn the key past the 3 O'clock position, which is where the cylinder falls out. The next step will be to replace the black plastic latch. Next time I'm near the dealership I'll pop in to price the part and decide from there.

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I have issues with my locks as well. When I clamp down the lock I can’t get the key out as it is so tight. It seems like there is to much pressure on the key. When the pannnier is not on the bike it locks easy and the key pulls right out. I have checked that I have the box on correctly and I do . Only happens on one side. Other side is ok