I was driving my G37 home today from work and noticed that when I reach 25+ mph, I heard a weird metallic scratching noise coming from the front right side of my car.

It looks like there are crack/fracture marks on the passenger side front knuckle suspension piece. I'm no expert but this looks dangerous. Has anyone seen this before? Is it safe to drive? I didn't hit anything except for minor curb rashing a few times parallel parking.

The first picture is of the one with fractures and the second is the driver side which looks fine.

 

I'm no materials engineer, but to me those just look like surface imperfections on the grain boundaries. I'm fairly certain one of my knuckles has a similar effect. In other words, the scratching noise is coming from something else.

Just my 2 cents though.

 

Agreed i am an engineer and those are simple imperfections from environment attributes.

From what your saying it could be breaks maybe.... jack the car and take a look underneath and tell us if you see something lose . Something tells me it could be break does it happen while breaking ?