Just bought a 2017 altima and I’m hearing a scraping sound when I step on the brakes what is wrong with my brand new car? And will

Just bought a 2017 altima and I'm hearing a scraping sound when I step on the brakes what is wrong with my brand new car? And will the car be protected under warranty

My car has 100 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hi there. I would seriously doubt that you have brake damage, but this is something that you should immediately bring to the attention of your Nissan dealership where the car was purchased. It’s possible that there is a leaf or some debris stuck in between a brake rotor and pad, but it should most definitely be covered under warranty within the first month or two of purchase.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Transmission Fluid Is Low: You may hear a grinding, whining or growling sound if your transmission is low on fluid. It may also be a gurgling sound.
The most common reasons a Nissan Altima makes noise when braking are bad brake pads, bad brake rotors, or bad brake caliper.
As brake pads wear down, the metal behind the pads comes in contact with your rotor, often resulting in a high-pitched squeal when you brake. Take that squeak as your queue to check your brake assembly. The fix may be as simple as getting new, genuine brake pads for your Nissan.
When brakes are making a scraping sound, it could indicate that a foreign body has gotten lodged between the pad and the rotor. In this case, the object needs to be removed. Similarly, squeaky brakes could simply mean they need some brake pad lube.
A common cause of grinding noises under your car are failing wheel or hub bearings. Wheel bearings allow the wheel and tire to rotate and are designed for low friction, while hub assemblies have an additional responsibility of securing the wheel and tire to the vehicle.
You might notice a grinding noise when driving at low speeds. The most common causes are problems with your continual velocity joints, brake pads, wheel bearings or alternator. Examining each one of these parts can help you pinpoint exactly where the issue is.
A knocking sound may be heard if the front axle is severely worn out. Loose Lug Nuts – Lug nuts attach the wheel to the vehicle. If the tires have recently been replaced or rotated it is possible that the lug nuts weren`t tightened to the wheel correctly. This may cause a knocking sound to be heard.
Usually, a grinding brake noise means the brake shoe or brake pad is worn out. This causes excessive heat build-up from friction in the braking system as worn parts are less able to dissipate heat. Solution: Get your brake pads or brake shoes replaced before the friction material undergoes extreme wear.
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.
If your rotors are faulty, they may produce a squeaking, squealing, or grinding sound when you apply the brakes. Warped rotors usually emit a high-pitched squeak, while severely worn rotors tend to make a scraping noise.
How to identify if my rotor is loose? To check if your rotor is loose, you may begin with basic observation. Give your watch a few shakes and listen to the sound the watch is making. If you hear a scraping sound, which is like a metallic sound that scrapes the case back or movement, your rotor most likely is loose.
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 hear this sound, it likely means you`ve worn out your brake pads to the point of exposing their metal backing plates, which are now rubbing against the metal of your brake rotors.
Possible Causes

Metal on metal contact between one or more parts of your vehicle`s suspension and/or steering systems is likely to blame. Causes may range from worn suspension bushings to broken coil springs to badly worn ball-joints, and more.

Loud Noise When Accelerating

It could mean the belt`s loose or worn. Or it could mean that one of the belt`s pulleys is starting to fail. Loud rumbling noise when accelerating might suggest there`s a problem with your exhaust system.

Knocking can damage the surface of the piston, the cylinder walls or the crankshaft bearings, all of which are expensive to repair. Modern computer-controlled injection systems can correct your fuel mixture to prevent knocking, but at the cost of engine performance.
Once an engine starts to knock, the rod can fracture without warning. It could be the next time you start it in your driveway, or it could keep going for six months. Eventually though, the engine will blow and you`ll be stranded somewhere.
If you start to notice rod knock, this isn`t a problem that will just resolve itself—you must take immediate action and replace the rod bearing while also fixing any other parts associated with the sound. If you do not take action quickly enough, you might need to replace the engine entirely.
The most common reasons a Nissan Altima engine makes a ticking noise are low oil level or pressure, an issue with the ignition system, or an exhaust leak. Search our network of RepairPal Certified shops near you to speak with a technician about your issue.
Low Power Steering Fluid: If you hear a squealing noise while turning the steering wheel, it may be an indication that the power steering fluid is low. Fluid may become low because of a leak. You can check under the engine for leaks by looking for red or pink liquid, the typical color of most power steering fluids.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Just bought a 2017 altima and I’m hearing a scraping sound when I step on the brakes what is wrong with my brand new car? And will
ANSWER : Hi there. I would seriously doubt that you have brake damage, but this is something that you should immediately bring to the attention of your Nissan dealership where the car was purchased. It’s possible that there is a leaf or some debris stuck in between a brake rotor and pad, but it should most definitely be covered under warranty within the first month or two of purchase.

I put the wrong key in my car and a few weeks later my car just shut down and it will not start I believe it’s the computer but…
ANSWER : Hi there. What had happened is the wrong key set the security to the vehicle. This is to prevent the vehicle from starting with the wrong keys. Try removing the battery cables (+) and (-) for 13 minutes. During that time, put the original key in the ignition and turn it on. Activate everything in the car even though there is no power. Then remove the key and hook up the battery cables. The computer should have reset and reset the security. If the security is still being tripped, then I recommend seeking out a professional, such as one from Your Mechanic, to help you

What’s wrong with my manual Jeep if I’m driving at 5th gear but it sounds like I’m driving at 3rd or 4th?
ANSWER : Since the car is still new, the vehicle should be taken back to the dealer to be checked under warranty. You may need a repair or replacement of the engine assembly. The engine may have an imbalance causing the problem. There is a technical bulletin that may pertain to this vehicle and call for engine replacement. The TSB is 09-008-16 and is dated June 16, 2016.

Car sounds like golf cart when revving and braking; also leaking fluid; sound fades as car warms up
ANSWER : Hello,
There are a number of things that could make an engine noisy when starting up. Depending on the specific type of sound you are referring to, this will determine how to properly diagnose. If there is a bit of a hissing sound, this may be a sign of a vacuum leak. If this is more of a shrieking sound, this may be a sign of a worn out or out of adjustment serpentine belt. If there is a bit of a howling or growling sound, this may be a sign of a worn out or low on fluid power steering pump. A rattling or pinging sound may be caused by an ignition problem. An engine can ping (or knock) due to an improper combustion process. A "spark knock" is the result of combustion occurring too early. Early combustion can occur from carbon buildup inside the combustion chamber, a lean air/fuel mixture, and advanced ignition timing (spark plug firing too soon). A clattering type sound may be a result of improper lubrication in the valve train which could be a more serious problem and should be addressed as soon as possible. I would suggest having an expert from YourMechanic come to your location to diagnose and inspect your vehicle to ensure everything is in proper working order.

Do I really need 4 new brake lines if no brake light is on and no visible brake problems while driving?
ANSWER : Hello. Depending on the area you live in, it is common for brake lines to corrode over time and need replacement. It is not too common, but in areas that have a lot of road salt this will occur. If it is the rubber lines then they just need to be replaced. If you want to have repaired, consider YourMechanic, as a certified mechanic can come to your home or office to replace the brake lines for you.

My car pulls to the driver’s side when braking, i’ve fitted new pads and a new caliper on the passenger side but no difference.
ANSWER : Hello, and thank you for writing in. There are several reasons why your vehicle may pull to one side or the other while braking. The first thing to consider is a warped rotor or faulty brake pads. When you replace the pads and rotors on the vehicle you need to replace two or four of them at a time. Replacing just the one on passenger side will not be adequate. With that being said, you are more concerned about the rotors then you are the calibers. The calibers hold the brake pads to the rotors when needed. It is a warped rotor or a bad brake pad that will cause the vehicle to pull. You should start with the full service brake job including machining the rotors to flatten them out if needed, and all new brake pads. If the problem continues after that, get an alignment done on the vehicle. For more help contact our service department to schedule an appointment.

2016 new car with coolant hoses broke and car overheated
ANSWER : If you are located in the United States and you have bought a brand new car covered by a manufacturer’s warranty, Federal and State "lemon laws" protect you in the event that a fault with the car is not repaired after a reasonable number of "attempts". Consequently, if there are presently problems with the car, that are covered under the warranty, and you have made repetitive requests of the dealer that those problems be fixed and yet you still have the problems, the thing to do is seek recourse under the various "lemon laws" in force. If there is maintenance required on the vehicle, such as oil and filter changes or non warranty repairs of any complexity, please avail yourself of YourMechanic’s cost effective mobile repair service. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Every time I brake I hear a noise and it gets worse when the car is coming to a stop.
ANSWER : Any noises coming from brakes or changes in brake pedal feel, warrant an inspection right away for safety. You just don’t know until an experienced mechanic has inspected your brakes. Brakes should be checked about every 15,000 miles or once a year. Play it smart and have the noise checked out.