I've logged better than 60,000 km on my 2012 Cougar 318SAB and never touched the wheel bearings other to inspect them, but I had catastrophic failure of the balance shackles. The bolts were rusted, the sleeves worn through and the bolt holes oval. They cannot be lubricated without removing the axles and I did not see the problem until a rear spring twisted and a tire got cut . Be warned!
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