Maybe his bakkie did 300 001km?
Your comment is a bit ignorant, to say the least. Being older and presumably knowing about cars (hence you posting in this sub forum), you'll know that parts don't always last as long as they should.
My comment is ignorant? Try to think before committing yourself to paper, so to speak. Especially in public.
OK I'll spell it out for you, because clearly you need spoonfeeding.
Yes, it's possible that his bakkie needed ball joints at 300 001 km, but if that were the norm, no-one would be bothered about them, and they wouldn't be an item of discussion. Things that get replaced at 300 000+ include everything on the car. Pirate part makers only sell what turns a profit, and if the ball joint on an Isuzu lasted 300 000km, they wouldn't be sold by the pirates, because it's just not profitable enough, so the theory that the GM ball joints are so wonderful is flawed - the very fact that there is a pirate part available indicates that the GM part is unreliable.
At 300 000km, you'd be looking at redoing the suspension in it's entirety not just a few ball joints.
And it's also clear from the post I quoted that DTBA isn't just talking about his own personal bakkie. The "We replace them..." is a clue. He's either talking from the point of view of a workshop or a fleet operator, and he's talking about more than one set of ball joints on more than one bakkie.
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