How is front wheel bearing replaced on a 2001 Volvo S40?

I’m assuming that you are taking about the front wheel, then yes, you need to replace the entire hub. The bearing does not come apart.

Not sure about your wagon, but many modern models do not have replaceable wheel bearings without changing entire hub assembly/

Most likely causes:
Front wheel hubs need replaced (do both at one time)
Front rotors warped or worn (change rotors and pads both wheels together)

The noise from the brakes dragging or the wheel bearings humming gets picked up by the abs sensors in the hubs before you can hear them. A few hundred miles later, the problem will get worse enough to hear while driving. Wheel hub replacement best done on a lift with an enormous impact wrench.

Turning to the right changes the load on the left, but that
isn't the problem

The problem is poor diagnoses & failure to replace both
wheel bearings when one fails

After all-- they both have the same mileage on them

hesitation is probably down to gearbox fluid being low bearings can be a nightmare but in best case u just need to take the hub off and get the bearings pressed out. if u take the hub off yourself and take it to sum were to get pressed u looking at an hours labor and w/e the bearings cost if they come out easily

2001 Pontiac Grand Am 2.4L SFI DOHC 4cyl

Vehicle Speed Sensor - Location:
The speed sensors are built right into the wheel bearings of your vehicle, at the front and rear locations. They work both with the anti-lock brakes and with the traction control systems on the vehicle.

Removal & Installation
Front
The front wheel speed sensor is part of the hub/bearing assembly. Refer to Wheel Hub and Bearing Replacement in Front Suspension for service procedures.
Rear
The rear wheel speed sensor is part of the hub/bearing assembly. Refer to Wheel Hub and Bearing Replacement in Rear Suspension for service procedures.

I hope help you with this (remember rated this help) Have a nice day, good luck.

I had a similar problem, I "thought" for sure it was a mis-fire. It turned out to be a problem with the right front axel & bearing assembly needing to be replaced. Once replaced & after a $600-$700 bill, it started running smoothly again. Good luck

abs control module

You can't just replace the bearings. You've got to replace the entire wheel hub (thank you genius engineers at Chevy). My driver side front wheel was rubbing the frame and the hub cost around $350 plus $150 labor.

I had this same problem myself. The hub is a sealed unit and must be purchased as a whole assembly to the tune of around $400 from Toyota. Long story short I never replaced my hub. The problem turned out to be tires that were worn out. I figured that out when i rotated the tires and the sound moved to the front of the car... Go figure. Replaced the tires and all the noise went away.