What a hub assembly is and why it fails
A hub assembly is the part of your wheel that holds the wheel bearing, allows your wheel to spin smoothly, and connects your wheel to the brake rotor. When it wears out or breaks, your wheel may wobble, make noise, or stop spinning freely. Hub assemblies fail because the bearings inside them wear down over time from friction and road stress, or because corrosion and water damage compromise the seal.
The hub assembly sits inside your wheel, so you cannot see it directly. You will notice it needs replacement when you hear a grinding or humming sound that gets louder as you drive faster, feel a vibration in the steering wheel or brake pedal, or see your wheel pulling to one side. Some vehicles also have a warning light on the dashboard when a wheel sensor built into the hub detects a problem.
Replacement is not optional once the hub assembly fails. A damaged hub can cause uneven braking, loss of traction control, and eventually wheel lockup or separation. The cost and timeline depend on which wheel needs the work, whether your vehicle has a pressed or bolted hub, and whether the brake rotor needs replacement at the same time.
Key Takeaways
- Hub assembly replacement involves removing the wheel, brake components, and the old hub, then installing a new one and reassembling the brake system.
- The job takes two to four hours per wheel at a repair shop, though the time varies based on whether the hub is pressed or bolted and how corroded the fasteners are.
- You will need a new hub assembly (the part itself), and often new brake pads or a rotor if the old ones are worn or damaged during removal.
- A mechanic will need to reprogram or recalibrate wheel speed sensors on many modern vehicles after the hub is installed, which adds time and cost.
- Doing this work yourself requires a hydraulic press or special tools to remove a pressed hub, so most owners take their vehicle to a shop.
The step-by-step replacement process
Replacement begins with lifting the vehicle safely on a jack stand and removing the wheel. The mechanic then removes the brake caliper and rotor to access the hub. On some vehicles, the caliper bolts off easily; on others, the rotor is pressed onto the hub and requires a puller tool to separate them.
Next, the old hub is removed. If your hub is bolted to the steering knuckle (the part that holds the wheel), the mechanic unbolts it and slides it out. If your hub is pressed onto the steering knuckle, a hydraulic press is needed to push the old hub off and the new one on. Pressed hubs are common on front wheels and many rear wheels on modern vehicles. This step is why most people cannot do hub replacement at home — a hydraulic press costs hundreds of dollars and requires training to use safely.
Once the new hub is in place, the brake rotor is installed (either new or the old one if it is still good), the caliper is bolted back on, and the wheel is reinstalled. The mechanic then torques all fasteners to the manufacturer's specification, which is critical for safety.
Wheel speed sensors and reprogramming
Many vehicles built in the last 15 years have a wheel speed sensor built into or mounted near the hub assembly. This sensor tells your vehicle's anti-lock braking system (ABS) and traction control how fast each wheel is spinning. When the hub is replaced, the sensor is either replaced with the hub or removed and reinstalled.
After the new hub is installed, the sensor often needs to be recalibrated or the vehicle's computer needs to relearn the sensor signal. Some shops do this with a scan tool that communicates with your vehicle's onboard computer. Others straightforward clear the warning light and let the vehicle relearn the sensor over the first few miles of driving. If this step is skipped, your ABS and traction control lights may stay on, and those systems will not work properly.
How long replacement takes and what it costs
A hub assembly replacement typically takes two to four hours of labor per wheel. The time depends on whether the hub is pressed or bolted, how corroded the fasteners are, and whether the brake rotor needs replacement. A front hub on a vehicle with bolted hubs might take two hours; a rear hub on a vehicle with pressed hubs and a corroded rotor might take four hours or more.
The cost of the hub assembly itself varies widely by vehicle make and model. Some aftermarket hubs cost $50 to $150; OEM (original equipment manufacturer) hubs often cost $150 to $400 or more. Labor rates at repair shops range from $75 to $150 per hour depending on your location and the shop's reputation. A complete replacement on one wheel, including the hub, labor, and often new brake pads or a rotor, typically runs $300 to $800 per wheel.
If both front hubs need replacement, the total cost can reach $1,200 to $1,600. Some shops offer a discount if you replace both hubs at the same time, since the work is similar and the shop can do it in one visit.
Choosing between OEM and aftermarket hubs
An OEM hub is made by your vehicle's manufacturer and is may provide to fit and work exactly as the original part did. An aftermarket hub is made by a third-party company and is usually cheaper but may have a shorter warranty or slightly different performance characteristics.
OEM hubs are more expensive but often come with a longer warranty (sometimes three years or more) and are less likely to fail prematurely. Aftermarket hubs are a good choice if you are keeping the vehicle for a few more years and want to save money. Some aftermarket hubs are made by reputable companies and perform well; others are lower quality and may fail within a year or two.
Ask your mechanic which brands they recommend and what warranty comes with each option. A hub assembly is not a part where the cheapest option is always the best choice, since a premature failure means paying for the labor again.
Signs you need hub assembly replacement soon
A grinding or humming noise that changes pitch with your speed is the most common sign. The noise usually comes from the wheel area and gets louder as you drive faster. You might hear it only when turning, because turning puts more weight on the outer wheel and increases the friction on the bearing.
A vibration in the steering wheel, brake pedal, or seat that gets worse at higher speeds also points to a failing hub. The vibration happens because the wheel is not spinning smoothly anymore. If the hub is very worn, the wheel may actually wobble visibly when you look at it from the side.
An ABS warning light or traction control light on your dashboard can mean the wheel speed sensor is failing or the hub bearing is so worn that the sensor cannot read the wheel speed accurately. Do not ignore these lights — they mean your anti-lock brakes and traction control are not working, which affects your safety in emergency braking or slippery conditions.
What happens if you delay replacement
Driving on a failing hub assembly is risky. As the bearing wears, the wheel spins less smoothly, which puts extra stress on the brake rotor, brake pads, and suspension components. The wheel may eventually lock up or separate, especially if you brake hard or hit a pothole.
A locked wheel means your vehicle will not stop evenly, and you may lose control. A separated wheel means the wheel falls off entirely, which is a catastrophic failure. These outcomes are rare if you address the problem within a few weeks of noticing symptoms, but they become more likely the longer you wait.
Delaying replacement also increases the chance that the brake rotor will be damaged by the time you get the work done, which means paying for rotor replacement on top of the hub replacement. A rotor damaged by a failing hub can cost an extra $100 to $300 to replace.
Frequently Asked Questions
Can I drive with a bad hub assembly?
You can drive short distances to get to a repair shop, but you should not drive long distances or at highway speeds. A failing hub can cause sudden loss of braking or traction control, which is dangerous in traffic or bad weather. If you hear grinding or feel vibration, schedule the replacement within a few days.
Do I need to replace the brake rotor when I replace the hub?
Not always, but often. If the rotor is worn, warped, or damaged during hub removal, replacement is necessary. If the rotor is still in good condition and the brake pads have plenty of life left, you can keep the old rotor. Your mechanic will inspect it and let you know whether it is safe to reuse.
What is the difference between a pressed hub and a bolted hub?
A bolted hub is held on with bolts that you can unbolt and remove. A pressed hub is forced onto a shaft and requires a hydraulic press to remove and install. Pressed hubs are stronger and more common on modern vehicles, but they require special tools to replace, which is why most people need a shop to do the work.
Will my vehicle need a wheel alignment after hub replacement?
Usually not, because the hub replacement does not change the angle of your wheel relative to the frame. However, if the old hub was so worn that your wheel was sitting at an odd angle, the alignment may improve after replacement. Your mechanic can check the alignment if you notice pulling or uneven tire wear.
How long does a new hub assembly last?
A quality hub assembly should last 100,000 to 150,000 miles or more, depending on driving conditions and road salt exposure. Hubs fail faster in areas with heavy salt use, frequent towing, or rough roads. A new hub should outlast the vehicle in most cases if it is installed correctly and the wheel bearings are not overloaded.