metallic sound with using brakes

[vonguido]

2005 4Runner 79,000 miles V8
So I am starting to hear a metallic sound outside the 4runner whenever I depress the brake pedal. It sounds like it is coming from the front driverside. Would this be an indication of a stuck caliper? or wheel hub assembly?
I know the passenger side will need a new wheel hub assembly sooner than later but this is coming from the driver side. Just curious your thoughts

 

[DZNUTS]

Take a look at the rotor. If the rotor surface does not look like it is worn uniformly, you probably need new pads and have your rotors cut (or replaced)

As to whether or not the caliper is seized, that will need a physical inspection.


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[AuSeeker]

Most likely the pads are gone and now you have metal to metal contact and eating up the rotor!!

 

[Rodtheviking]

Caliper stuck/rusted on the guide pins, wore down one of the pads to metal. Happened to me a couple of times.

 

[DZNUTS]

Caliper stuck/rusted on the guide pins, wore down one of the pads to metal. Happened to me a couple of times.

You need to reassemble the slide pins with caliper lube. It's like anti-seize for your slide pins


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[Fern]

Sounds like your brake pads are done and you are down to the metal.

 

[TechWrench]

While you are checking the brakes, also check that the backing plate, behind the rotors is not rusting out and contacting the rotor. That will cause a noise.