This Doesn't Seem Right: Replace Wheel Bearing?

idk about 1, but it is certainly worth getting a few quotes if you can

 

Took it in where? The dealer? Post your receipt with part numbers, how much for each part, and labor?

A) Yes according to the TIS (factory manual, see attached)

• If the sensor rotor needs to be replaced, replace it together with the rear axle hub and bearing assembly.
• The rear speed sensor is a component of the rear axle hub and bearing assembly. If the sensor malfunctions, replace the rear axle hub and bearing assembly.

B) Checking just the part prices
Each hub/bearing is ~$300:
REAR AXLE SHAFT & HUB. 2012 Toyota Prius | Toyota

I can't find the rear sensors but the fronts are ~$200 each:
ABS & VSC. 2012 Toyota Prius | Toyota


That would be at least $1000 in parts.

 

You don't pay extra for the sensors. When you buy the Toyota rear hubs, they have the sensors.

The sensors are press-fit into the hubs. Toyota doesn't sell the sensors separately.

You might be able to find some aftermarket brand that sells hubs and sensors a la carte.

But if you remove the hub so you can take it to a press and change just the sensor, you will probably trash the bearings in the course of getting the hub out of the car (at least in a region that salts any roads).

Then you need the hub anyway. Probably why Toyota doesn't sell the pieces separately.

 

I recently changed my two rear hubs. Bought Timkens which look identical down to the serial number. About $200 each which includes the non-replaceable speed sensors. My issue was a howling rear bearing. About an hour and half of work, primarily because one was rust welded and required a slide hammer, rented free at the local O'Reillys. Even if you pay a mechanic two hours you might be out $600. Half if you do just one. There are far less expensive hubs but most are likely to fail in a year. A 2012 Prius rear is Timken HA590373. I would verify.

A comparison of my Prius v parts

 

Here n NC the just fall off after smack w hammer . I bought similar to above . Complete 147 for pair . It’s ok if they fail n 5 yrs I’ve front and rear susp components loaded ready to go as we hav 3 gen 3 now and 2 gen 2. So it’s easier to keep things ready to install. As the cars are making 75 to 260 miles per day