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#1
02-26-2020, 01:59 PM
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4.8i Alternator life .
Hello, i have a 2007 4.8 with about 260K Km (160K miles) . I do some long distance driving with the family a few times a year, and I was just wondering if anyone has high mileage like me on the original alternator?
I was going to pull it out next month or so to inspect how much wear is left on the brushes and the com.
__________________
2001 X5 3.0i 2007 X5 4.8i 
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#2
02-26-2020, 03:24 PM
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Mine failed on our n62 at 115k miles. But probably not the fault of the alternator. Had a valve cover leak that "helped" it. Took out the voltage regulator.
__________________
2005 X5 4.4i Build 04/05 Maintenance/Build Log Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles) 2006 X5 4.8is Build 11/05 Maintenance/Build Log Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles) 2010 X5 35d Build 02/10 Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
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#3
02-26-2020, 03:43 PM
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Quote:
Thanks.
__________________
2001 X5 3.0i 2007 X5 4.8i
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#4
02-26-2020, 10:11 PM
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Quote:
Have you scanned your battery for the recent charging? That should tell you a good story. You sure your alternator is original? Sent from my iPhone using Xoutpost.com
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#5
02-26-2020, 10:15 PM
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Quote:
__________________
2001 X5 3.0i 2007 X5 4.8i
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#6
02-28-2020, 12:27 PM
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Quote:
Graphed my volatage and i'm always between 14.5 and 14.9. I know its working good. Just worried more about the brushes ending there life when I'm on a long drive.
__________________
2001 X5 3.0i 2007 X5 4.8i
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#7
05-15-2020, 06:31 PM
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At 160k miles, your'e definitely on borrowed time. I lost mine at around 80k miles due to burned out regulator due to timing cover leak, but if you've kept it clean of oil, I suspect you can make it to 180k miles if you're lucky.
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#8
06-07-2020, 12:57 PM
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Our first E70 N62 alt lasted 140k Kms (replaced voltage regulator) our other E70 N62 made it to 110k Kms (bearing failure). At 260k you are doing well but as mentioned on borrowed time in my opinion.
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Old enough to know better but young enough not to listen
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#10
06-10-2020, 09:49 AM
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If it's not broke, don't fix it. Alternator bearings (in general and in all cars) tend to be the first thing to go. You'll know. It will start howling like a bad wheel bearing. 99% of the time the bearings fail softly...they'll just get louder and louder as time goes on, thus, giving you plenty of warning. I see a lot of people posting about the voltage regulator. I thought the E70 doesn't use a voltage regulator on the alternator? I think that because I've read it somewhere or heard it mentioned on a battery coding tutorial video. That's why coding the battery is so important so the DME knows what to tell the alternator to put out. Maybe the pre LCI ones had voltage regulators and LCI ones don't. I'd have to look up part number for both and compare.
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