What Causes Wheel Bearings To Go Bad?

When your car starts making strange sounds or pulling to one side, you might think it's a tire issue—but it could be the wheel bearings.

These small parts play a big role in keeping your vehicle running smoothly.

If you're interested in how cars work or are thinking about a future as an auto mechanic, learning what causes wheel bearings to go bad is part of the journey.

Continue reading to learn more! We’ll break down what wheel bearings are, why they matter and what causes them to go bad. If you're serious about cars, this is knowledge you'll want to have if you’re ready to start training for an auto technician career.¹

Wheel Bearings, Explained

So, what are wheel bearings?

Wheel bearings are small steel balls held together in a metal ring called a “race.” They sit inside the hub at the center of the wheel and help it spin smoothly. Without them, your wheels would rub and drag.

They take on a lot of pressure. Every bump, turn and stop sends force through the wheel bearings. When they're in good shape, you barely notice them.

But when they start to fail? You’ll feel—and/or hear—it.

Why Are Wheel Bearings Important?

Even though they’re small, wheel bearings are critical. They:

• Help your wheels spin with little resistance.
• Keep your tires moving in the right direction.
• Support the weight of your vehicle.

If they go bad, they can cause steering issues, uneven tire wear or even a wheel coming off while driving. That’s why spotting the signs early is key—especially for someone looking to work in the field.

8 Reasons Why Wheel Bearings Go Bad

So, what causes wheel bearings to go bad? Here are the most common culprits.

Uneven Terrain

Driving on rough roads or hitting potholes can put extra stress on the bearings. Over time, the cumulative damage wears them down faster.

Low Tire Pressure

Tires with too little air can change how weight is distributed across your vehicle. The added pressure can strain the wheel bearings.

Unbalanced Tires

If one tire spins faster than the others, or if weight isn’t spread evenly, it makes the bearings work harder than they should.

Misaligned Suspension System

Your suspension system helps absorb shock. When it’s off, vibrations travel straight to the wheel bearings, causing early wear.

Improper Lug Nut Tightening

If lug nuts are too tight or too loose, it can shift the wheel in ways it shouldn’t. That puts pressure on the bearing assembly.

Harsh Weather or Climate

Moisture, ice or extreme heat can cause the seals on bearings to break down. Once that happens, dirt and water can sneak in and cause damage.

Failed Seals

The seals protect bearings from grime and rust. When they break, it’s only a matter of time before the part fails.

Oversized Tires or Wheels

Bigger wheels may look cool, but they’re heavier. That extra weight adds more strain to the bearing system.

6 Symptoms of Failing Wheel Bearings

Want to know how to spot a bad bearing? Look for these signs:

1. Faint Vibration

A light shaking feeling in the steering wheel or floorboard, especially while driving at faster speeds.

2. Strange Noises from Wheels or Tires

Grinding, humming or growling noises when turning or speeding up.

3. Poor Steering Response

The steering may feel loose or harder to control than usual.

4. Pulling to One Side

If your car keeps drifting to one side, a damaged bearing might be part of the problem.

5. Excessive Shaking

Vibrations or wobbles that get worse the faster you go often point to a wheel bearing issue.

6. Excessive Heat from Wheel/Tire

Does your wheel feel hot after driving? That could mean friction from a failing bearing.

What Causes Wheel Bearings To Go Bad—and What To Do Next

Knowing what causes wheel bearings to go bad means knowing how terrain, pressure and component wear affect performance. These parts may be small, but the impact they have is major.

If an automotive career sounds like the right fit, don’t wait to get started. A Universal Technical Institute (UTI) Admissions Representative can help you explore your options and answer any questions. Call us at 800-834-7308 to take the next step!