Squeak when turning left

[Mad Cow]

My car has a really loud and annoying squeak that comes from the driver's side wheel only when I turn left, no matter how hard I turn. I could be changing lanes and it'll squeak. I took off the wheel and I saw that the outer CV boot was really worn on the inside of the ridges. When I turned the wheel to the left and spun the hub I noticed that it would make a noise at a certain point in each revolution. I know that the rotors are a bit warped because the car vibrates under hard braking, could this also cause the squeak?

[Inodoro Pereyra]

Don't worry: just keep it straight, and you're good...

Ok, seriously, I'd first check the shock, and if it's in good shape, I'd replace the CV axle.

[Mad Cow]

The shock and axle? How does that have anything to do with my problem? It's an intermittent squeak, the rate depends on how fast I'm going so I can't see how that would come from the shock. And I forgot to mention, it goes away when braking lightly. So can I get away from just replacing the pads, or should I do the rotors too?

[Inodoro Pereyra]

The shock and axle? How does that have anything to do with my problem? It's an intermittent squeak, the rate depends on how fast I'm going so I can't see how that would come from the shock. And I forgot to mention, it goes away when braking lightly. So can I get away from just replacing the pads, or should I do the rotors too?

Ohhh, Ok, you didn't say that before...
sometimes, when your shocks are starting to let go, they will squeak when you apply (or release the) pressure to them, like when turning, but it's ONE squeak, not consecutive, rhythmic ones.
If that's your case, yes, the problem could be your brakes (no way to know if you need only the pads, or also the rotor, without looking), your wheel bearing (if you lost all the grease) or the CV axle.

[Mad Cow]

Oh, I can see why you thought that now, yea I should be more clear next time.

I hope it's not the rotors, otherwise I'll have to add them to the growing list of suspension/brake related stuff I need to replace.

[umcamara]

Another sometimes-overlooked cause is the brake dust shields being bent and scraping against the rotors. In this case just bend them away from the rotors.

Since it goes away when you brake though I would tend to think the calipers aren't sliding freely on the pins and the pads are being held close enough to where they skim the rotors when not braking. But take a look at the dust shields also.

As Inodoro said, wheel bearings are a major cause as well, but more of a rubbing/grinding sound than a squeaking.

[Inodoro Pereyra]

As Inodoro said, wheel bearings are a major cause as well, but more of a rubbing/grinding sound than a squeaking.

Very true. I just mentioned it because there seems to be a lot of people having problems differentiating a squeaking noise from a grinding noise (not particularly in this forum, but in real life. I work at Advance Auto Parts).