Going to be doing the Mazda 3 brake pads soon and noticed they have little metal shims/spacers between the pads and the carrier. Do these just need cleaning or do they get replaced as well? 
Never come across these before normally it's just the pads straight into the carrier after changing it up with a wire brush.
	
		
			
		
		
	
				
			Never come across these before normally it's just the pads straight into the carrier after changing it up with a wire brush.
 
	 
  
 
		 
 
		 
 
		