According to the service manual, the bolts you showed (whether front or rear wheels) are supposed to be secured with a thread locker (Loctite or equivalent). However, when I removed the shims on my front wheels, I noticed that the bolts had NO thread locker. Apparently the factory doesn't always follow its own rules. When I put the bolts back, I did use thread locker. Maybe I'll remove the rear ones now and put them back using Loctite, just to be safe.Chris said:In my case it was the bolts pictured here that broke causing the control arm to seperate. (there are actually 2, only one is pictured) These are the bolts you would remove if you were to pull your shims.
I have always suspected that they were not torqued on properly which should be a part of the PDI ritual then checked again at first service since it is an obvious problem. This ultimately led to them loosening then breaking.
Of course, that doesn't matter if the heads pop off. Stronger bolts required?