It's common practice to replace the race as well as the bearing, but not necessary. So it's your call -vs- their call, they aren't trying to scam you.
If you do have the race replaced also just hope they can get it out... if not it's a whole new steering knuckle... replacing all 3 is about a grand with labor.
If you do have the race replaced also just hope they can get it out... if not it's a whole new steering knuckle... replacing all 3 is about a grand with labor.