I just brought a 2nd hand E46 about 2 months ago. Mileage : 103000 KM (318 year 01/02)Recently, I heard some noice from the back wheel sound like baring problem but the mechanic told me the issue is "Axle Differential Baring" and i will cost around 6k to replace a new one and recon cost 2.5k My questions: 1. Have any exprience this problem before?2. How much is cost?3. Is there an alternative solution?4. What cause the problem? (Ware and tear?)5. Any alternative mechanic (reliable and hobours for second opinion)?- take is offline - lukeccw@yahoo.com Please help!