kevofcov
Member Since: 06 Nov 2007
Location: Other end of M69
Posts: 532
  
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| How long do alternators last? |
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Graphite 2016 90,000 miles
Looking ahead and hoping to swerve any calls from SWMBO - 'there's a light on the dash'.
How many miles before alternators starts giving trouble?
Mileage is two thirds motorway, one third town but this doesnt really matter....
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 13th Apr 2023 7:57 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8072
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The same length as a piece of string  what is the light? It can when others can't,
It will when others won't,
It goes where others don't.
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| 13th Apr 2023 8:06 pm |
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kajtzu
Member Since: 11 Aug 2017
Location: Helsinki
Posts: 6566
  
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On original here with ~300k km driven…
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| 13th Apr 2023 8:06 pm |
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kevofcov
Member Since: 06 Nov 2007
Location: Other end of M69
Posts: 532
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I'm thinking they are just bushes and bearings. The way the driver drives makes little difference. If people say they generally last 100,000 miles before trouble I will be out there this weekend.
But if peeps say very approx 200,000 then this weekend I will be sat on the sofa in me pants doin xbox as planned...
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| 13th Apr 2023 8:11 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8072
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If t ain’t broke don’t mend it otherwise you can forget the Xbox  It can when others can't,
It will when others won't,
It goes where others don't.
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| 13th Apr 2023 8:22 pm |
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eightfoot
Member Since: 12 Apr 2015
Location: sunny essex
Posts: 762
 
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| Re: How long do alternators last? |
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kevofcov wrote:Graphite 2016 90,000 miles
Looking ahead and hoping to swerve any calls from SWMBO - 'there's a light on the dash'.
How many miles before alternators starts giving trouble?
Mileage is two thirds motorway, one third town but this doesnt really matter....
my 2005 has 155000mls still on original alternator and starter motor please excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4
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| 13th Apr 2023 8:28 pm |
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Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1815
 
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kevofcov wrote:I'm thinking they are just bushes and bearings. The way the driver drives makes little difference
Nope, they are not… there are brushes, a collector and a “transsistor” involved…
Basically they are the real wearing points… Water and dirt can speed up wear.
But normally an alternator from denso do a lot of miles before significantly wear occurs
But another issue, can speed up or cause transistor/regulator wear/damage. Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc. 
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| 13th Apr 2023 9:31 pm |
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sarumlight
Member Since: 07 Nov 2008
Location: Off the Plain
Posts: 1590
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It’s the diodes that fail. Sometime in the first 500,000 miles usually. Does that help?
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| 13th Apr 2023 9:49 pm |
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Moo
D3 Decade
Member Since: 13 Aug 2010
Location: Wiltshire
Posts: 13879
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192,000 miles. New Defender L663 110 SE (known as Noddy!)
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner 
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
Still original injectors and turbo
V8 Front brakes
BAS Remap, Allisport Intercooler and deCat
EGRs blanked
T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
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| 13th Apr 2023 11:24 pm |
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A.J.M
Member Since: 31 Oct 2009
Location: Carluke
Posts: 2815
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My D3’s original alternator got changed at 97k.
The replacement failed at 180k.
So on that sample.
You have 7k of life.
Or it’s died 7k ago and hasn’t had the heart to tell you.
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| 14th Apr 2023 7:30 am |
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john watson
Member Since: 10 Nov 2011
Location: lanark
Posts: 956
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Died around 35,000 miles. Must be just about ready to go as now at 77000 miles.although the first alternator lasted 5 years present one going strong at 12 years on. Probably die on me when I’m miles from nowhere somewhere on the west coast on holiday ( in the pouring rain)! Once you have defeated the idiots any job is half done. Pity there are so many idiots to defeat.
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| 14th Apr 2023 9:36 am |
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john watson
Member Since: 10 Nov 2011
Location: lanark
Posts: 956
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AJM
Just a thought. I’m in Lanark and after 17 years of ownership I probably have a fair collection of bit and piece not to mention tools for the beast. Even have an Autel 200 that appears to work. So if you get stuck on anything give me a shout. Todays project replace the key fog casing. Once you have defeated the idiots any job is half done. Pity there are so many idiots to defeat.
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| 14th Apr 2023 9:43 am |
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A.J.M
Member Since: 31 Oct 2009
Location: Carluke
Posts: 2815
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Could do with a local welder to give the sills and back arches some attention.
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| 14th Apr 2023 4:34 pm |
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waterbuoy
Member Since: 26 Oct 2013
Location: Argyll
Posts: 2862
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285k miles and still on the original alternator (but second compressor) on the D3 and still going
D4 has done 145k miles on both the originals, ditto
If that hasn't jinxed it then nothing will! Currently 2009 Disco 3 SE, 2013 MY D4 HSE and 2016 D4 SE
Previously:
TD5 Defender 110 CSW (230k miles)
300TDi Disco 1 (289k)
4 RR Classics (300-350k each, 2 manual, 2 auto)
110 V8 CSW (220k)
S3 109 hi cap pickup (ex RN)
S2A 88 Safari SW with lpg conversion (bloody lethal)
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| 14th Apr 2023 4:44 pm |
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