Once this happens, you’ll notice that the brake pedal feels low or spongy because the piston is traveling farther than normal to apply braking power.

Rollers on this type of bearing are secured in a cage between the inner and outer races. The tapered roller bearing is expected to move around the cage freely to allow heat expansion.

Wheel bearings are a crucial component because they let the wheels rotate while supporting the weight of the entire vehicle. When they become faulty, your vehicle’s wheel hubs are going to create noises and vibrations while you’re driving, which can be unnerving. They can fail catastrophically and cause your wheel to seize, which can result in a crash. Replace your faulty wheel bearings immediately with new ones from CarParts.com.

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Wheel bearings connect the wheel and the axle - you can learn more about how they work in this guide. They are hard-wearing and can last between 60,000 and 100,000 miles. You may notice grinding or scraping noises when they wear out, especially when accelerating and turning.

The cost would be the same as a replacement, as there’s no other way to fix a damaged wheel bearing than to replace it with a new one.

Scraping when you accelerate in an automatic car indicates there may be a problem with the transmission. Specifically, the gears could be worn, which happens naturally over time but can also be accelerated by low transmission fluid.

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If you suspect your CV joints are worn, contact a mechanic immediately and avoid driving your vehicle until it has been inspected. The average price of a repair is £161.54 when you book through FixMyCar.

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Another possibility is that the brake pads are not worn but are of poor quality. Defects such as metal chunks in the rubber pad, through poor manufacturing, can cause scraping from the get-go. Fitting good quality brake pads will last a lot longer and cost less in the long run.

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You'll first notice that your aircon stops blowing cold air. A leaking or worn-out bearing will create a scraping or squeaking sound, while a seized bearing is more likely to make a grinding noise.

The compressor must be in good shape for the AC system to work effectively. It uses a sealed bearing to rotate, and when this bearing wears out, there will be obvious signs.

Booking an air conditioning service is the best way to determine the exact cause of the problem. The average price when you book through FixMyCar is £101.30.

Ball bearings reduce friction by using hardened steel balls between the inner and outer races. This type of wheel bearing is designed to operate at high speeds and control an axle shaft’s thrust movement.

The compressor is responsible for powering your car's air conditioning unit. It places the refrigerant under extremely high pressure and pumps it into the condenser, where it transforms from gas into a liquid.

If there's enough fluid in the reservoir and no visible leaks, it may be the case that one or more transmission components are worn and need replacing.

Driving with a bad wheel bearing is never a good idea. Aside from compromising your safety, you also risk damaging other parts of your vehicle, which can lead to costly repairs down the road. In extreme cases, driving with a bad wheel bearing can even cause one of your wheels to fall off while driving.

This diagnostic guide will help you identify what's causing the scraping noise and access relevant repairs, putting your mind at ease and getting you back out on the road.

Lastly, fatigue or spalling can lead to fractured bearing surfaces and cause the bearing material to break off after some time.

In some cases, you might even need to replace the entire hub because you won’t be able to get to the damaged bearing without disassembling the entire unit.

The first thing to do is check the transmission fluid reservoir. Top it up as needed - this may fix the scraping noise - and see if you can spot any leaks. Leaking fluid is a sign you should stop driving and book a repair as soon as possible.

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A scraping noise from your brakes may indicate that your brake pads are worn out - read about how long they should last here. When they wear out, the exposed metal rubs against the metal of the rotor, making an unpleasant noise. Your pads need replacing to avoid more extensive damage.

Roller bearings have rollers between the inner and outer races to reduce friction. Compared to a ball bearing, this type has a longer contact area to support heavier loads.

Like our joints rely on fluid to protect them, so do CV joints. They are packed with grease and sealed inside rubber boots. However, when they fail, they can no longer transfer power from the engine to the wheels, which is dangerous.

Because both the bearing and rollers are tapered for this type, it can accommodate more weight. Unlike other types, the load on the tapered roller bearing is directed over the entire length of each roller instead of concentrating on a small spot.

Some vehicles also have needle bearings, which is a type of roller bearing that uses smaller needle rollers. This type is not adjustable because the clearance between the diameter of the straight roller is manufactured into the bearing itself.

The water pump takes coolant from a car's radiator, moving it through the motor and back to the radiator to keep the engine cool. A bad bearing could be to blame for the scraping noise or the water pump pulley. If this is the case, you may also notice leaking coolant under the pump.

A damaged or worn-out wheel bearing can cause the brake rotor to wobble on its axis, which can push the caliper piston into its bore.

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William “Bill” Guzenski has produced hundreds of how-to videos for the automotive community. He’s an ASE Certified Master Automobile Technician, and is affiliated with the Specialty Equipment Market Association (SEMA). He loves attending race events and car shows throughout the country, as well as traveling in his 40-foot motorhome, exploring abandoned mines and ghost towns.

The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

The alternator converts chemical energy into electrical energy, charging the battery and other components as you drive. It lasts about seven years - between 80,000 and 150,000 miles - though it can fail prematurely.

These anti-friction wheel bearings come in the form of ball, roller, and tapered roller bearings. And while each of them has distinctive features, they all perform the similar task of converting sliding friction into a rolling motion.

In a nutshell: A scraping noise could be caused by a worn wheel bearing, transmission problems, a damaged water pump or alternator, a failing aircon compressor, a worn CV joint or old brake pads.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication. Read our full disclaimer here.

Wheel bearings let the wheels rotate while supporting the entire vehicle. These bearings come with rolling parts inside them that help reduce friction.

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If you have any other issues with your car that you'd like to try to diagnose yourself, check out our guide on self-diagnosing car problems. The more you know about how your car works, the better.

Wheel Bearing costAutoZone

Although there is less friction when using ball bearings, they’re not made to support the same weight as roller bearings.

CarParts.com offers a wide variety of wheel bearings from the top manufacturers at different price points. You can purchase wheel bearings individually, in sets of two, or sets of four, depending on your needs. Our parts are shipped from strategically located warehouses, so you won’t have to wait a long time for your part to arrive.

The average price of an alternator repair booked through FixMyCar is £524.99. It may cost less to replace a bearing, so it's worth shopping around for quotes.

An easy way to do this if you cannot remove the debris by hand is to drive gently in reverse, release the brake, and then repeat to remove anything stuck between the calliper and the disc.

The tapered roller bearing is the most common type used in vehicles. It is designed to support both radial and axial loads.

Replace your vehicle’s faulty wheel bearings before they fail. Check out our selection of wheel bearings and shop at CarParts.com today!

Constant velocity (CV) joints are ball-and-socket mechanisms connecting the axles to the front wheels. They aid steering, driving and braking, making them crucial components. A typical front-wheel-drive car has two CV joints on each axle, one connected to the wheel and the other to the transmission. They must be in top condition and capable of handling the vehicle's total weight.

If you can hear a scrape along your wheel, check for debris in and around your brakes by carrying out a visual inspection. Upon finding anything that shouldn't be there, try your best to remove it. Foreign objects are most likely wedged under a brake pad or by the wheel bearing.

A metal scraping noise while driving is not only shrill, it's also annoying. More importantly, it's potentially dangerous to your car and your safety.

Wheel bearings are generally designed to last the lifespan of your vehicle. However, driving conditions, habits, and other factors can cause them to fail like any other car part.

A scraping noise often indicates that the alternator's bearings are worn out or dirty. Other signs of a worn alternator include: