I have a 2008 toyota 4runner limited v6 4wd with 56,000 miles. I started hearing a humming sound and was told it was wheel bearings. It took 4 days for the shop to fix. They broke an axle in the process and cost me $1300+. My questions are: 1- how long do wheel bearings typically last? 2- is it common for axles to break in this process? 3- does this job typically take 4 days to fix and does it usually cost $1300? $480 for the axle alone? Thanks.