Hi all,
I recently brought my 128i into the shop for a mild whirring / whining noise at low rpm under engine load. It kind of sounds like a turbo spooling or a sucking noise between 1000-2000 rpm, and it's been steady for the past year or so.
Mechanic diagnosed it as faulty alternator bearings. When I put a screwdriver to the alternator and hold my ear to it at idle it's exactly the noise that I hear during load. Otherwise alternator is functioning well, no electrical symptoms, and I can probably live with the noise - it's pretty mild and I've gotten used to it at this point.
My question is - is there any harm in leaving it until the symptoms get much worse, or until the alternator fails?
My options are: new OEM part ($965 + $20 for bolts) + 1.5 hours labour, used part ($100-250 on eBay - from salvage cars with varying mileage - a lot with around the same mileage or higher mileage than my car).
Are there any other options for getting the part cheaper?
Thanks for your advice!
(P.S. I live in Canada, and the car is a 2009 128i with ~60k miles).
I recently brought my 128i into the shop for a mild whirring / whining noise at low rpm under engine load. It kind of sounds like a turbo spooling or a sucking noise between 1000-2000 rpm, and it's been steady for the past year or so.
Mechanic diagnosed it as faulty alternator bearings. When I put a screwdriver to the alternator and hold my ear to it at idle it's exactly the noise that I hear during load. Otherwise alternator is functioning well, no electrical symptoms, and I can probably live with the noise - it's pretty mild and I've gotten used to it at this point.
My question is - is there any harm in leaving it until the symptoms get much worse, or until the alternator fails?
My options are: new OEM part ($965 + $20 for bolts) + 1.5 hours labour, used part ($100-250 on eBay - from salvage cars with varying mileage - a lot with around the same mileage or higher mileage than my car).
Are there any other options for getting the part cheaper?
Thanks for your advice!
(P.S. I live in Canada, and the car is a 2009 128i with ~60k miles).
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