The big pin isn't in contact with the pads. All it does is hold the spring down. If the cotter pin is checked every time the pads are changed and replaced if its corroded there's no reason why it would fail before the next pad change.
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2004 Boxster S Silver - FUNTOY
2002 Boxster Base Guardsy Red - FUNBOX
1987 Caterham Super 7 1700 Supersprint
2009 Mercedes Benz CLK 350 convertible
1941 Dodge Luxury Liner Coupe
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