Check a wheel bearing replacement quote

What the job usually involves.

A wheel bearing lets the wheel spin smoothly on its hub. On many newer vehicles the bearing comes sealed inside a hub assembly that bolts to the steering knuckle. On others the bearing is pressed into the knuckle, usually with the knuckle removed and a hydraulic press, or on the car with a special press tool.

The technician usually removes the wheel, the brake caliper and rotor, and on driven wheels the axle nut, before reaching the bearing. The wheel speed sensor used by the anti-lock brakes is often disconnected or replaced along the way. The axle nut and hub bolts are then tightened to the manufacturer's torque, which matters for the life of the new bearing, and the car is road-tested.

What a complete written quote should state.

• The wheel: front or rear, left or right.
• Bearing only or complete hub assembly, with brand or part number.
• Whether a wheel speed sensor is included or reused.
• Any axle nut, seal or fasteners replaced.
• Whether an alignment is included, and why: it is usually needed only if parts that set the wheel angles were disturbed.
• Labor as hours or a flat price, shop supplies, disposal fees and tax.
• The written warranty on parts and labor.

SourceFederal Trade Commission — Auto Repair Basics ↗ (opens an external site)

What changes the total.

The bearing design usually matters most. A bolt-on hub assembly is a larger part but can take less labor; a press-in bearing is a smaller part that needs more time and a press.

Front or rear, two-wheel, four-wheel or all-wheel drive, and whether the sensor is built in all change the work. Rust matters too: a hub seized in the knuckle can take much longer to remove, so ask whether the quote allows for that or would change. Part grade, the local labor rate and tax account for the rest.

Bearing only, or the hub assembly?

Whether a bearing can be replaced on its own depends on the vehicle design: on hub-assembly designs the bearing is usually not sold separately. Where both are possible, the choice trades parts cost against labor time. On many press-in bearings a magnetic ring in the seal is read by the wheel speed sensor, so the bearing must be fitted facing the right way.

Some designs are different jobs altogether. Many rear-wheel-drive trucks with a solid rear axle have the bearing inside the axle housing, which means removing the axle shaft and often replacing the gear oil and seal, and some older or heavier vehicles use tapered roller bearings that are cleaned, repacked with grease and adjusted. Ask which design your vehicle uses and which one each quote assumes, and compare quotes for the same wheel.

When a second opinion is worth it.

• The quote does not say which wheel the bearing is for.
• Both sides are recommended without a finding for each side.
• The replacement is based only on a noise description, with no written check of the wheel.
• One quote is for a hub assembly and the other for a press-in bearing.

A badly worn wheel bearing can affect steering and braking, and the wheel speed sensor feeds the anti-lock brakes. If the noise grows quickly, the wheel feels loose or the ABS light comes on, have it inspected promptly.