Brakes making grinding noise.

My barkes are making a grinding noise. It is only the grinding noise, otherwise they work fine.
Experienced mechanics share their insights in answering this question :
The brakes grinding could be an indication they are metal to metal. If the pads are worn out then they are digging into the rotors. In some vehicles with some styles of pads could make an intermittent grinding noise from the materials that are built into the pads. The only way to be sure is to do a complete brake inspection. I would recommend having a mechanic like the certified ones at YourMechanic come and check it out for you to see what is causing the problem.

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If you hear grinding noises when stopping or slowing down, your brake pads are most likely the issue. Remember, over time your brake pads lose their thickness and begin to make squealing noises known as “brake scrubbing.” As your pads wear down further, you`ll hear a grinding noise instead.
The loud metallic noise when braking that you will hear means that the brake pads have been completely worn down. The growling or grinding noise is being caused by the friction of the two pieces of metal (the caliper and the disc) rubbing together. This can scratch or “score” the rotors, making the surface uneven.
One possible cause is debris or dirt stuck in the brakes, which can create friction and lead to a grinding noise. Another potential reason is a misalignment of the brake calipers, causing them to rub against the rotor instead of smoothly pressing against it.
The sound is usually heard when you stop your car, but you may also feel the brake pedal rumble as you step on it. The best way to fix this issue is to have your brake pads replaced immediately, but at this point, you may also need to replace the discs or rotors.
Driving with grinding brakes is simply not safe. Brakes are a critical component of safe driving and should not be overlooked. If your brakes start to fail: Don`t drive any further.
If you notice strange sounds when you are braking, this could be caused by low brake fluid or another brake system issue. Common sounds include scraping or grinding noises. Burning smells after hard braking could mean that you have burnt-out brake fluid.
Uneven brake pads: When the brake fluid gets low, the pedals cannot depress brake pads with the same amount of pressure. This causes uneven wear on the pads. In turn, you experience squeaking, squealing, and grinding when you apply the brakes. The vehicle may also rumble and vibrate when you use the brakes.
A rubbing sound could be an early sign of a worn brake pad rubbing against the rotor. The pad could be in an early stage of wear before it moves on to a heavy grinding noise. Another possibility is a braking pad that hasn`t fully released. If you haven`t driven your car in a while, there may be rust on the rotors.
It`s an excellent solvent against oil, grease, brake fluid, dried-on dirt and braking residues. It has been specially designed to rapidly dry ensuring it quickly and effectively cleans brakes by letting the solvent disolve the dirt. It improves the performance of the braking systems and stops any grinding noise.
WD-40 Specialist Automotive Brake and Parts Cleaner is safe to use on clutch and brake assemblies, brake discs, callipers, brake drums, brake pads and brake linings.
Brake grinding may be a sign that something is wrong with your braking system, which may lead to extensive repairs and dangerous situations. In fact, the National Highway Traffic Safety Administration estimates that faulty brakes may be a factor in 25% of all vehicle crashes. So, be proactive!
The metal-on-metal grinding noise you hear is the steel part of the brake pad grinding against the brake rotor, and it`s not good. You need to get a brake pad replacement immediate when they are shot before they also destroy your rotors or brake calipers, which can be a very expensive repair.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Car making popping noise when braking.
ANSWER : After seeing the video, you will need to have the lower ball joints and bushings checked to see if one or all need to be replaced. You should also have the exhaust checked to see why the engine is so loud. A professional mechanic, such as one from YourMechanic, will be able to thoroughly conduct tests to diagnose your vehicle’s popping noise and make the appropriate repairs.

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Car makes grinding noise – 1996 Chevrolet Corsica
ANSWER : Hey there, thanks for writing in. I would have a professional mechanic check out the constant velocity joints on your vehicle. One or more of them may be worn enough to cause the noises you describe. S/he can diagnose and replace any failed CV joints.

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when i turn it make little noise. when press on brake and put on reverse it’s makes weird noise and shakes. thank you
ANSWER : It sounds like you may be dealing with a few issues. I would start by asking if there is a check engine light on? If there is, then getting the engine control module scanned for faults would be the first step to diagnosing the low power issue. As far as the noise over bumps and when turning, there could be a damaged CV joint or axle shaft, or there could be a loose suspension or steering component. Weak motor mounts could cause a weird noise and shake when going into reverse with your foot on the brake, so it’s possible those have failed as well. I would suggest having a qualified mechanic, such as one from YourMechanic, diagnose the noise over bumps and the noise when put in reverse.

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grinding noise while turning right or driving straight
ANSWER : Hello. If the noise is still there when the engine is off and if you are not turning the wheel, then it is typically either a failing bearing in the rear differential or it can be a failure in the transfer case if it is four wheel drive.

The transfer case is a very common failure on this vehicle. If it is two wheel drive then I typically start by draining the oil from the rear differential and inspecting the fluid for metal.

Any metal in the fluid indicates a bearing failure. If that is also fine, then it may be an issue within the transmission. It may be a failure in one of the thrust bearings. If you need to get this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your car’s grinding noise.

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SUV has new brake pads and rotors. Making a grinding noise when I brake but, not everytime
ANSWER : This circumstance is not unusual and I suspect is often related to the use of non-OEM rotors and non-OEM brake pad material and also the failure to re-apply factory specified shims and/or appropriate anti-squeal compounds and lubricants. Unfortunately, once non-OEM parts and materials are used, and thus in essence an "experiment" is set up, brake noise can be a result. If there is a warranty, of course your first recourse is to simply return to the vendor and have them resolve this problem. Missing shims should be considered and the possibility of a lubricant solution should be considered. If the pads are non-OEM and are of low quality materials, for instance if they have lots of metallic chunks, such low quality pads will be inherently noisy. If the noise arises from the brake pad material, really the only solution is to remove the pads and install the more appropriate OEM friction material (rotors should be re-surfaced and/or de-glazed if any pad substitution is attempted). If you would like a professional opinion regarding this issue, please simply request a brake noise diagnostic and a certified mechanic will be dispatched by YourMechanic to evaluate your brakes and pinpoint the cause of the noise.

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Grinding noise while braking – 2006 Porsche Cayenne
ANSWER : Okay, so with brakes, the concept is fairly simple and hasn’t changed much over the years. You have a rotating disk and it is being squeezed on both sides by a pair of pads. If you are hearing a grinding noise, then something other than the brake pad surface is touching that rotor. Your vehicle type is a huge red flag (Being a higher end vehicle). I have a family member with an Audi and she took it to a non-Audi related place to have her brakes done. They used the wrong pads or did not follow a proper procedure and it caused her a lot of headaches. If you did not take your Cayenne to a Porsche certified technician, they may have done something similar with your vehicle. Many times some of these less reputable shops use the cheapest parts they can find. Please find a Porsche certified technician to recheck the work if the person who performed the work the first time was not. If they were a reputable shop, you should be able to bring the vehicle back and have it redone at no charge.

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My ABS light and occasionally my emergency brake light is coming on and my brakes occasionally make a grinding noise when coming to a stop.
ANSWER : Hello there, many faults will cause your ABS light and emergency brake light to be seen on your 2009 Chevy Aveo5. When the ABS light is on it indicates there is a fault in the ABS system. This fault will leave a code stored in the ABS computer which when read will narrow down what is going on. Common faults are a wheel speed sensor, ABS module, or a wiring harness fault. To avoid any unnecessary repairs, a qualified technician such as one from YourMechanic will be able to diagnose your ABS light and make any repairs required to resolve the issue.

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Changed front brake pads. After 2 weeks the brakes make a grinding noise at low speeds.
ANSWER : Hi there. In some cases if the brake pads are not correctly aligned upon installation, they can cause this type of grinding noise. It’s also common if the calipers or rotors are too tight for the rotor to warp, which can also cause this noise. However, it’s also possible that the wheel bearings are damaged, which tends to be the source of constant grinding noises. You should have a professional mechanic come to your location to complete a car is making a noise inspection to help diagnose this issue and recommend the right repairs.

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