Heavy dust on wheel

[ElDoc72]

I just noticed a lot of black dust on my front passenger wheel. Any idea what does it means? None of the other 3 wheels shows the same dust. Thanks!

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[autotragic]

Looks like brake dust to me. The fact it's only on one wheel may indicate that it's from a puddle or something you drove through though. Use a wheel cleaner and wash it off and see if it comes back.

 

[2019 JLUR]

If after cleaning and if it comes back check for a brake that is hanging up.

 

[Apples491]

If it's brake dust, it means that brake is doing more work than the other side. Could be that it's sticking, which would probably be a caliper piston issue. The pads could also be misaligned, causing the brake to contact the rotor unevenly. Or it could be that the other side isn't gripping, perhaps due to air in the brake line. You could take the front tires off and visually inspect to see if the pads look like they're wearing at the same rate.

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