Bad wheel bearingsound

Located within the wheel hub, wheel bearings are a set of steel balls enclosed by a metal ring. They are located on a metal axle shaft and responsible for ...

Whatever the cause may be, vehicle warning lights shouldn’t be ignored. Have your vehicle checked right away, so you can have the wheel bearings or any other faulty components replaced.

It is normal for tires to wear out because of prolonged use or unfavorable driving conditions. However, uneven tire wear may also be caused by faulty wheel hub components, such as loose bearings that may cause misalignment.

Perhaps the down comforter of soft failures is a bad wheel bearing. Loss of lubrication will cause them to wear, resulting in a rumble that sometimes can be more felt than heard (they may also squeak or squeal), but the failure process is gradual. They’ll get louder as wear and play embrace each other in an ever-widening downward spiral, but you’d have to be an idiot not to hear it and address it, making outright failure rare. Wheel bearings are pretty robust in BMWs. After owning over 70 cars, I’ve only ever seen one wheel bearing that completely self-destructed—a ’67 2000CS I bought came with one that had destroyed the stub axle. I had to replace the entire front strut assembly.

Still, to be careful, I pulled into the right lane, slowed down, and listened. The somewhat rapid onset was uncharacteristic of a wheel bearing, but the other symptoms fit. Since I had a recording appointment with a fiddle player, I preferred to keep going, unless of course I couldn’t for safety reasons. The rumbling remained at a constant low level, so I assumed it was a wheel bearing doing the soft failure thing, and continued on.

As mentioned, driving with bad wheel bearings can put you and your passenger at risk. Thankfully, you don’t have to break the bank to get high-quality replacements. You can find exactly what you need at an unbeatable price at CarParts.com.

On newer BMWs, the front wheel bearings are very different than on the 1970s-era cars. About ten years ago, I owned a ’99 E39 528iT wagon that needed struts, control arms, and other front-end work. The E39’s wheel bearings are part of an assembly that includes the front hub—the wheel bearing assembly bolts to the steering knuckle, and the wheel bolts directly to the bearing assembly.

When it comes to keeping your vehicle rolling smoothly, your wheel bearings play a vital role. In fact, if they aren't properly functioning, you could be in for ...

I then jacked up the left front wheel and rocked it at 6 and 12. Yup, play. Then I spun it. Yup, rumbly. No doubt—a bad left wheel bearing. I set the car back down and began to walk back to the computer to order the bearings, vividly recalling how much of a pain in the butt they were to replace in the 528iT wagon ten years ago. I wondered if maybe still having those eight spare bearing bolts had made the whole thing a matter of fate.

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3/32 .09375 2.381. 7/64 .109375 2.778. 1/8 .125. 3.175. 9/64 .140625 3.572. 5/32 .15625 3.969. 11/64 .171875 4.366. 3/16 .1875. 4.763. 13/64 .203125 5.159. 7/32.

In the repair world, there are “hard failures” and “soft failures.” Hard failures are things that instantly drag a car to a stop when they break. Broken ball joint? The worst type of hard failure—the front wheel folds under the fender like a broken ankle and you lose control of the car. Bad fuel pump? Usually a hard failure—it either pumps or it doesn’t. (Okay, there are some exceptions. The one my E39 wigged out on a low tank in hot weather, then recovered. I replaced it anyway.)

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Keep your trips safe and hassle-free by ensuring that all faulty bearings are replaced right away. Have a mechanic check your vehicle as soon as your vehicle exhibits any of the symptoms above. Replace faulty bearings if needed, so you can get back on the road in no time.

Then I checked the lug nuts on the right front wheel. While none were loose to the point of being free-spinning, all were substantially below the 88 foot-pound torque spec. The rears were fine.

Another way to check the source of the sound is to temporarily overinflate your tires. If the wheels produce the same sound while you drive, the noise is likely coming from your wheel bearings.

In some cases, yes, custom wheels and tires can cause your wheel bearings to wear faster. This is because original equipment (OEM) bearings are designed to carry specific loads, which means they won’t be compatible with every single tire out there.

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On 1970s-era BMWs, there are inner and outer front wheel bearings with each sitting in its own race that’s pressed into the hub. Since the front discs on these cars sit on the inside surface of the hub, and since the bearings lift out of their races and present their greasy private parts to you when you pull the hub off the spindle, the advice is that, if there’s no documentation on how old the bearings are, to replace both sets of bearings on both sides when the front discs are replaced.

Abnormal tire wear may be caused by other suspension issues, so it is best to let a mechanic rule out other possible parts that may be causing your tires to wear unevenly.

If you’re not equipped with adequate knowledge and tools to identify the problem, let a mechanic troubleshoot your vehicle for you.

To prevent this from happening, make sure that your wheel bearings are in good condition. Watch out for the following symptoms that may indicate a faulty bearing.

I snugged them down, grabbed the wheel at 6 and 12 and verified that the play was gone, spun it and verified that the noise was gone, let the car down off the jack, and tightened them up with a torque wrench.

When I arrived home, I pulled the nose of the car right into the garage, then hopped on the laptop to get a set of front wheel bearing on order. I looked on FCP Euro, and was more than a little surprised to find that a front wheel bearing kit with German FAG wheel bearing assemblies now cost $312. Of course, I still had that set of bolts, so I could save myself the $4.29 per bolt right there. I mean thirty-four bucks is thirty-four bucks, right? One FAG bearing was $139. I began entertaining replacing just the left bearing, then price-shopping other manufacturers, when I decided that I should be certain that the wheel bearing was really the problem.

I can only speculate what happened. Due to the space constraints in my garage, when I swap winter/summer wheels, I’ll usually pull one end of the car in, jack it up, swap both wheels, snug the lug nuts with a ratchet, let the car down, torque the nuts, air the tires, then pull the car out, flip it around, and do the other side. I must’ve gotten interrupted. Maybe I received a text I felt that I needed to respond to. Maybe my wife was leaving and I walked outside to kiss her goodbye. Maybe I had back pain and took a break. I don’t know.

Rear wheel bearings on old BMWs are incredibly robust. I’ve only ever had one go bad. It was on a Bavaria that my wife and I took on vacation to Martha’s Vineyard in 1986. We were foolishly driving in near-hurricane conditions and got caught in a tidal surge on the road that runs on the barrier beach between Edgartown and Oak Bluffs and drove through water that was deeper than we expected (as I said, foolish). On the drive home, the right rear wheel bearing began rumbling ominously. At the time, I didn’t own the necessary bearing puller, and had to take the car into the late great Beaconwood Motors who had the back page ad of Roundel for a generation. It was one of a handful of repairs the past 40 years I’ve paid someone else to do.

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While bigger and wider tires can certainly make your vehicle look cooler, they might be too heavy for your OEM wheel bearings. The added load can cause them to wear and fail faster.

My ever-rational left-brain shot back indignantly. “You can’t be serious,” it sneered. “You actually had a wheel fall off that 1600 back in 1984. And you’ve had two close calls, both more recently than you’d like to admit. You know what loose lug nuts sound like, and this wasn’t it. And you learned your lesson. You conditioned yourself to always tighten lug nuts with a torque wrench. It’s not loose lug nuts. Really. It’s not. It can’t be. You are not that careless.”

Your anti-lock braking system (ABS) warning light may also turn on if you have a bad wheel bearing. This is because the ABS sensor or encoder ring of some vehicles is integrated into the wheel hub assembly.

To make sure this doesn’t happen again, I’m instituting a new system of checking the lug nuts on all four wheels after I’ve done any work where a car is jacked up for any reason.

Driving with bad wheel bearings can put you and your passengers’ safety at risk⁠—it can cause your wheel and/or tire assembly to become loose.

To start, fill out our vehicle selector to narrow down the catalog to compatible bearings. Then, use the search filters to find the products that match your preferred brand, price, etc. We have a round-the-clock customer service representative, so if you have questions, don’t hesitate to contact them via our toll-free hotlines.

Failing wheel bearings can make the steering wheel feel rough and cause excessive vibration when accelerating or cornering.

Choose from a wide selection of competitively priced wheel bearings sourced from the leading brands in the industry. They passed stringent quality control tests, so you’re sure to get parts that are built to last.

In contrast, soft failures are things that either give you ample warning before they fail completely, or their failure doesn’t immediately drag the car into the breakdown lane. A textbook soft failure is when the alternator or voltage regulator dies. Even though the battery is no longer being charged, the car can continue to run for some amount of time off the battery alone. On a vintage car like a 2002, you can likely drive for hours during daylight before the battery no longer has enough juice to light the spark plugs. On a late-model car loaded with electric motors and control modules, you might have more like fifteen minutes to an hour—enough to get to a rest area, possibly even a repair shop.

I intentionally jacked up the car at the right front wheel—the one I didn’t think was making the noise—to get a baseline. I grabbed it at 6 and 12, rocked it, verified it was tight, and spun it. As expected, it was quiet.

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When getting custom wheels, be sure to take into account the load capacity and other specifications of your vehicle’s wheel bearings.

The short answer is no. As mentioned, driving with a bad wheel bearing is dangerous. Severely worn bearings may cause the brake rotors to wobble, resulting in reduced brake performance.

Wheel bearings come with a seal that protects them from water, mud, and road salt. In some cases, however, these contaminants can get past the seal, contaminate the grease, and damage the bearings.

Driving over potholes and speed bumps can cause your wheel bearings to wear faster. Constantly bumping into tall curbs can also damage them. While you can’t exactly change the conditions of the roads you pass by, you can deliberatey drive slowly.

Faulty wheel bearings can cause your vehicle to pull to one side as you apply the brakes. However, take note that it’s also possible to experience abnormal side pull due to faulty brake components as well. For instance, a defective caliper or a worn-out rotor may cause similar issues.

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The exact price can vary depending on several factors, including your vehicle’s year, make, and model. In general, however, you can expect a wheel bearing replacement to cost anywhere between $10 and $660. If you own a luxury car, you can expect to spend a lot more as its parts tend to be more expensive.

It’s easy to overlook this symptom—especially if you often drive with loud music on. But the moment you turn the radio off, these noises become noticeable from behind the wheel.

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And so, just to be certain, to placate my left brain and make sure I didn’t go to all that work unless it was absolutely necessary, I took a 1/2-inch ratchet and a 17mm socket and checked the wheel’s lug nuts.

I was driving my 2003 E39 530i up to do some recording in Chelmsford, about 30 miles north of me, when I began to hear and feel a rumbling coming from the left front of the car. It ramped up over several minutes, but then plateaued. If it instead had gotten VERY loud VERY quickly, with obvious metal-smacking-against-metal instead of the more gentle rumble of a worn bearing, that would be the hallmark of loose lug nuts, something you need to pay attention to IMMEDIATELY because you may have only five or ten seconds before the wheel falls off.

While wheel bearings are designed to last the life of your vehicle, they aren’t invincible. They can wear and fail due to a number of reasons, such as the following:

And I’m going to have some sort of voodoo ceremony with that bag of Locktite-coated wheel bearing bolts. I can’t tell whether they were bad juju that triggered the problem or a talisman that warded off disaster, but clearly they played some role outside the normal Western vectors of Newtonian mechanics and Cartesian cause and effect. They deserve reverence.

Wheel bearings are a primary friction reducing element in your car's suspension. Imagine for a moment a wooden wagon wheel rolling on a fixed solid wooden axle.

Although bearing rumble is usually quite clear, part of testing for a bad wheel bearing is to jack the car up, set it on stands, grab the wheel at the 6:00 and 12:00 positions, and push-pull it. If you’re hands are at 3:00 and 9:00 instead, play in a front wheel can come from anything in the steering mechanism, but 6-and-12 play pretty much has to be coming from the wheel bearing. In an old-school car with adjustable wheel bearings, if there’s no rumble, you can try adjusting the bearing by pulling the cotter pin and moving the castellated nut by one notch, but play plus rumble equals bad.

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Another symptom that drivers may observe is looseness or excessive play on the steering wheel. This typically becomes more noticeable while driving over rough road surfaces.

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Unusual sounds coming from the wheel are often the first sign that something may be wrong with the vehicle’s wheel bearings. Bad wheel bearings produce noises that are often described as growling, humming, or rumbling sounds. In some cases, these failing parts may also produce a high-pitched sound.

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Take note, however, that these unusual sounds do not always mean that your bearings are faulty. Cupped tires and other wheel hub-related issues may cause similar noises.

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Rob Siegel has been writing the column The Hack Mechanic for Roundel Magazine for 35 years, and is the author of eight books available on Amazon. He currently owns thirteen cars. Yes, his wife knows about all of them.

After the recording session ended, I began driving back toward the highway. As I approached a small service station, I debated stopping to have them throw the car up on the lift and check it, but again, since the rumble remained low and constant, I headed home. Still, to err on the literal side of safety, I stayed in the right lane, turned the flashers on, and drove at 50 mph.

Like other symptoms, steering difficulty may be caused by more than one faulty component. It’s best to take your vehicle to an auto repair shop for proper diagnosis.

In an ideal scenario, wheel bearings can last up to approximately 85,000 to 100,000 miles. But remember that this is just an estimate. Several factors can affect the lifespan of your bearings, such as their quality and the way you drive your vehicle.

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Wheel bearings connect the wheels to the axle, which make them crucial components of the wheel hub assembly. They minimize friction to help the wheels rotate smoothly.

These bearings are usually held together by a metal ring. Most modern vehicles have single wheel hub assemblies, which integrate the hubs and bearings. However, on some vehicles, these two parts are considered two separate components.

Rob’s newest book, The Best of The Hack Mechanic, is available here on Amazon, as are his seven other books. Signed copies can be ordered directly from Rob here.

If the noises are different across varying road surfaces, there’s a good chance that the sound is being produced by your tires. However, if the sound remains the same, it’s likely caused by failed wheel bearings.

Have your vehicle checked by a mechanic as soon as you notice unusual wheel noises. Even if the wheel bearings aren’t the culprit, it’s better to err on the side of caution and make sure that your wheels are in top condition.

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Since the tire assembly may loosen, drivers could end up losing control of the vehicle. Needless to say, this situation could cause major accidents on the road.

Wheel bearing noises are typically in sync with the rotation of your tires. The sound may become noticeably louder as your vehicle accelerates. In some cases, the sound may also change depending on the direction of the steering wheel.

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