2001 jeep cherokee roar left front when brakeing

does the roar change with left or right turns? most likely a wheel bearing, Dodge has poor front ends. or..is the brake dragging? the rotor would be hot after driving, discolored, smoking.

Jack up the front wheels and check for loose play in the hub bearings. Excessive play in the bearings allow the rotors to ride at an angle against the brake rotor creating drag. The roaring is the bearing itself that has failed.

you have to check the bearing on left side, it may need to change, and after make sure of tyre condition and pressure.

The caliper assemblies mey be sticking when you apply the brakes. This condition can be cuased by overheated brake fluid. I would have a brake and alignment shop check out the front brakes.

its possible it could be a wheel hub bearing,but it could be a faulty brake caliper or a brake hose,if it pulls when the brake is applied then you have a brake issue

BLEED BRAKE SYSTEM

Make sure one end of the Jeep is raised (starting with the rear end) and secure on jack stands and the wheels on each side have been removed. If you have been working on the brakes, this should already be done.

Connect a clear rubber tube to the bleeder valve on the right rear brake caliper. Start with this end and side because it is farthest from the master cylinder.Place the tube's other end into a container partially filled with brake fluid.

Open the bleeder valve on the caliper and have an assistant press on the brake pedal inside the Jeep. Look for a mixture of air and fluid to come out of the valve. Once all the air is purged and the fluid runs cleanly from the valve, close the screw and remove the tube.

Repeat the process for all four brakes. Move to the left rear next, followed by the right front and the left front. If you need to, reconnect the Jeep's rear wheels and lower the rear end before raising the front end and removing those wheels.

Check the level of fluid in the master cylinder periodically as you bleed the brakes. If the level drops below the needed fill line, add more fluid. Use fresh fluid, not any that you have bled from the brakes.

Start the Jeep's engine after bleeding all the brakes and press on the brake pedal. You might need to do this repeatedly to seat new brake pads you just installed. Turn off the engine and hold down on the pedal. Bleed the brakes again if the pedal sink within 15 to 20 seconds.

checked the wheel bearings and sometimes the clips will rub the rotors

It could be a number of things. First check your brakes for any rocks or excessive dirt. Second, check to make sure you are not in need of new brake pads. Brake pads are equipped with a tab that starts making noise when its time to replace your brakes. Third, have the bearing checked. Once the bearing get excessively worn they will start making a squeaky sound. Also have the shocks checked. the bushing worn out in shocks can also cause the noise. The best bet is to have your local mechanic inspect your front end for any wear. Once he does this, he can compile a list of parts that need replaced. Then you can replace or fix it yourself.

have the front wheel caster and, camber checked and, set by an auto shop before your wheel bearings fail

if it is a roaring noise it is probably a wheel bearing going bad