On all my 3 series', clutch and brake have metal arms and a rubber pedal. The accelerator is hinged from the floor and is plastic.
Note that the accelerator on my e36 (not sure about the rest - I'd imagine the same applies) is one use only - so if it is removed for any reason, it must be replaced. Maybe this was the reason for it breaking in your mate's M5.
Note that the accelerator on my e36 (not sure about the rest - I'd imagine the same applies) is one use only - so if it is removed for any reason, it must be replaced. Maybe this was the reason for it breaking in your mate's M5.