I was hearing some hum from my front of the car, it got loader around 60-80 mphs. At first I thought it was the cars engine, then I would cruise on the highway and put it in neutral and noise persisted. The dealership said both front wheel bearings needed to be changed. They quoted me $950 parts and labor. I found the DIY and figured I'd give it a whirl or hire my mobile mechanic to do it. The confusion is which parts to buy
I have 2004 FX35 AWD
1) Do I buy the bearing alone or whole assembly, or does it just come one style ?
2) If they are available separately what are the pro and cons of doing whole assembly vis just bearing alone ?
3) What is the correct Infiniti/Nissan part # ?
4) What is the cheapest and reliable place online to get OEM parts ?
Thanks for answering some of my Newbie questions

I have 2004 FX35 AWD
1) Do I buy the bearing alone or whole assembly, or does it just come one style ?
2) If they are available separately what are the pro and cons of doing whole assembly vis just bearing alone ?
3) What is the correct Infiniti/Nissan part # ?
4) What is the cheapest and reliable place online to get OEM parts ?
Thanks for answering some of my Newbie questions