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Alternator

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MPA 15908N AlternatorMPA 15908N Alternator
MPAPart # 15908N
MPA 15908N Alternator
4.33 Reviews
$300.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1994-1994 Saab 900, 1994-1994 Saab 900, 1994-1994 Saab 900, 1995-1997 Saab 9000, 1995-1998 Saab 900, 1996-1997 Saab 9000, 1996-1998 Saab 9000, 1999-2002 Saab 9-3, 2003-2003 Saab 9-3
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
15908N, 0-123-320-057, 0-123-325-007, 0-123-335-005, 0-123-320-011, 0-123-320-039, 19135009, 89037359, 
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item #1001Q597
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Alternator - TYC 2-08290
TYCPart # 2-08290
Alternator - TYC 2-08290
4.52 Reviews
$179.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2005 Buick Rainier, 2002-2002 Chevrolet Trailblazer, 2002-2002 Chevrolet Trailblazer EXT, 2003-2003 Chevrolet Trailblazer, 2003-2004 Chevrolet Trailblazer, 2003-2004 Chevrolet Trailblazer EXT, 2003-2005 Chevrolet Trailblazer, 2003-2005 Chevrolet Trailblazer, 2003-2005 Chevrolet Trailblazer EXT, 2003-2005 Chevrolet Trailblazer EXT, 2002-2002 GMC Envoy XL, 2002-2004 GMC Envoy, 2003-2005 GMC Envoy XL, 2004-2005 GMC Envoy XUV, 2005-2005 GMC Envoy, 2003-2005 Isuzu Ascender, 2002-2004 Oldsmobile Bravada, 2005-2005 Saab 9-7x
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
2-08290, 335-1091, 8290, 19244750, 91652, 91617, 13-4734J, AL8805N, 
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item #1002LZW9
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Alternator - TYC 2-08302
TYCPart # 2-08302
Alternator - TYC 2-08302
4.52 Reviews
$180.99
Quantity Less than 5
Edit ZIP code
3-year warranty
90 days free return
Fits 2007-2007 Buick Rainier, 2007-2008 Chevrolet Trailblazer, 2007-2009 GMC Envoy, 2007-2009 Saab 9-7x
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
2-08302, 8302, 15225927, 8302603, 8302N-6G1, 15 259 927
item #1002N2LK
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MPA 11058N Alternator
MPAPart # 11058N
MPA 11058N Alternator
4.33 Reviews
$221.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2006-2006 Saab 9-2X, 2004-2005 Subaru Impreza, 2006-2006 Subaru Impreza, 2006-2006 Subaru Impreza, 2006-2008 Subaru Forester, 2006-2010 Subaru Forester, 2007-2007 Subaru Forester, 2007-2007 Subaru Forester, 2007-2010 Subaru Impreza, 2007-2010 Subaru Impreza, 2008-2008 Subaru Forester, 2008-2008 Subaru Forester, 2008-2008 Subaru Forester, 2008-2008 Subaru Forester, 2008-2008 Subaru Forester, 2008-2010 Subaru Impreza, 2009-2010 Subaru Forester, 2009-2010 Subaru Forester, 2009-2010 Subaru Forester, 2009-2010 Subaru Forester, 2009-2010 Subaru Forester, 2010-2010 Subaru Impreza, 2010-2010 Subaru Impreza
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
11058N, A2TG0391, 23700-AA540, 23700-AA541, 88861837, 32-01-0646, 11058
item #1001PVUG
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Alternator - TYC 2-08498
TYCPart # 2-08498
Alternator - TYC 2-08498
4.52 Reviews
$210.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2007-2007 Buick Rainier, 2007-2007 Chevrolet Trailblazer, 2007-2007 Chevrolet Trailblazer, 2007-2007 Chevrolet Trailblazer, 2008-2009 Chevrolet Trailblazer, 2007-2009 GMC Envoy, 2007-2008 Isuzu Ascender, 2007-2009 Saab 9-7x
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
2-08498, 8498, 15225928, 8-15225-928-0, 15569, 8498N, 15 225 928
item #1002N1R1
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MPA 11453N Alternator
MPAPart # 11453N
MPA 11453N Alternator
4.33 Reviews
$294.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2010-2010 Buick Allure, 2010-2010 Buick Allure, 2010-2010 Buick LaCrosse, 2010-2016 Buick LaCrosse, 2010-2011 Cadillac SRX, 2012-2012 Cadillac SRX, 2010-2011 Chevrolet Equinox, 2011-2014 Chevrolet Captiva Sport, 2012-2013 Chevrolet Impala, 2014-2014 Chevrolet Captiva Sport, 2014-2014 Chevrolet Impala, 2014-2016 Chevrolet Impala Limited, 2015-2019 Chevrolet Impala, 2020-2020 Chevrolet Impala, 2010-2011 GMC Terrain, 2011-2011 Saab 9-4X
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Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
11453N
item #1001PUN0
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MPA 15718N Alternator
MPAPart # 15718N
MPA 15718N Alternator
4.33 Reviews
$198.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2006-2006 Saab 9-2X, 2005-2005 Subaru Legacy, 2005-2005 Subaru Legacy, 2005-2005 Subaru Outback, 2005-2005 Subaru Outback, 2006-2006 Subaru Impreza, 2006-2006 Subaru Impreza, 2006-2006 Subaru Impreza, 2006-2006 Subaru Impreza, 2006-2006 Subaru Outback, 2006-2010 Subaru Forester, 2007-2007 Subaru Impreza, 2007-2007 Subaru Impreza, 2007-2007 Subaru Impreza, 2007-2011 Subaru Impreza, 2007-2011 Subaru Impreza, 2008-2008 Subaru Forester, 2008-2008 Subaru Forester, 2008-2009 Subaru Forester, 2009-2010 Subaru Impreza, 2009-2011 Subaru Impreza, 2010-2010 Subaru Impreza, 2010-2010 Subaru Impreza, 2010-2010 Subaru Impreza, 2010-2011 Subaru Impreza, 2010-2012 Subaru Forester, 2010-2013 Subaru Forester, 2011-2011 Subaru Impreza, 2011-2013 Subaru Forester, 2012-2013 Subaru Forester, 2012-2014 Subaru Impreza, 2013-2014 Subaru WRX, 2013-2021 Subaru WRX STI
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Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
15718N
item #1001Q32A
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Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT624
A-Premium®Part # APALT624
Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT624
4.7406 Reviews
$176.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2007 - 2007 Buick Rainier, 2007 - 2009 Chevrolet Trailblazer, 2007 - 2009 GMC Envoy, 2007 - 2008 Isuzu Ascender, 2007 - 2009 Saab 9-7x
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Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
8498N, 8498, 15225928, 8152259280, 400-12284, ADR0370, 240-6205E, 8400107, 
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item #10044K8H
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Alternator 120A 12V Clockwise 5-Groove Pulley A-Premium APALT740
A-Premium®Part # APALT740
Alternator 120A 12V Clockwise 5-Groove Pulley A-Premium APALT740
4.7406 Reviews
$231.99
Quantity Less than 2
Edit ZIP code
2-year warranty
90 days free return
Fits 2006 - 2011 Saab 9-3, 2010 - 2011 Saab 9-3X
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Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
11186N, 11186, 0124425033, 0124425040, 12-75-5484, 12-75-7363
item #1000H4CG
Note
This item only fits models with manual transmission.
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Alternator 110A 12V Clockwise 5-Groove Pulley A-Premium APALT744
A-Premium®Part # APALT744
Alternator 110A 12V Clockwise 5-Groove Pulley A-Premium APALT744
4.7406 Reviews
$181.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2006 - 2006 Saab 9-2X, 2006 - 2010 Subaru Forester, 2006 - 2006 Subaru Impreza, 2007 - 2010 Subaru Impreza, 2005 - 2005 Subaru Legacy, 2005 - 2005 Subaru Outback
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
11226N, 11226, 23700AA520, 23700AA521, 23700AA570, 32010647, A003TG0491, 23700-AA520, 
...View more
item #1000DEST
Note
This item only fits the turbocharged engine type.
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Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT1248
A-Premium®Part # APALT1248
Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT1248
4.7406 Reviews
$246.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2010 - 2011 Cadillac SRX, 2010 - 2011 Saab 9-5, 2011 - 2011 Saab 9-4X
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
11507, 104210-2170, 13502584
item #1002E3WV
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MPA 8302603N Alternator
MPAPart # 8302603N
MPA 8302603N Alternator
4.33 Reviews
$215.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2007-2007 Buick Rainier, 2005-2005 Cadillac Escalade, 2005-2006 Cadillac Escalade EXT, 2006-2006 Cadillac Escalade, 2006-2006 Cadillac Escalade ESV, 2007-2008 Cadillac Escalade, 2007-2009 Cadillac Escalade EXT, 2007-2010 Cadillac Escalade ESV, 2009-2010 Cadillac Escalade, 2005-2005 Chevrolet Silverado 1500, 2005-2005 Chevrolet Silverado 1500, 2005-2005 Chevrolet Silverado 2500 HD, 2005-2005 Chevrolet Silverado 3500, 2005-2006 Chevrolet Avalanche 1500, 2005-2006 Chevrolet Silverado 1500, 2005-2006 Chevrolet Silverado 1500, 2005-2006 Chevrolet Silverado 1500, 2005-2006 Chevrolet Silverado 1500, 2005-2006 Chevrolet Silverado 1500, 2005-2006 Chevrolet Silverado 1500 HD, 2005-2007 Chevrolet Silverado 1500, 2007-2007 Chevrolet Silverado 1500, 2007-2007 Chevrolet Silverado 1500, 2007-2007 Chevrolet Silverado 1500 Classic, 2007-2007 Chevrolet Silverado 1500 Classic, 2007-2007 Chevrolet Silverado 1500 Classic, 2007-2007 Chevrolet Silverado 1500 Classic, 2007-2007 Chevrolet Silverado 1500 Classic, 2007-2007 Chevrolet Silverado 2500 HD, 2007-2007 Chevrolet Suburban 1500, 2007-2007 Chevrolet Suburban 1500, 2007-2007 Chevrolet Tahoe, 2007-2008 Chevrolet Suburban 2500, 2007-2008 Chevrolet Trailblazer, 2007-2009 Chevrolet Suburban 1500, 2007-2009 Chevrolet Tahoe, 2007-2010 Chevrolet Avalanche, 2007-2010 Chevrolet Tahoe, 2008-2008 Chevrolet Silverado 1500, 2008-2008 Chevrolet Silverado 1500, 2008-2008 Chevrolet Tahoe, 2008-2009 Chevrolet Silverado 1500, 2008-2009 Chevrolet Suburban 1500, 2008-2010 Chevrolet Suburban 1500, 2009-2009 Chevrolet Colorado, 2009-2009 Chevrolet Express 1500, 2009-2009 Chevrolet Express 1500, 2009-2009 Chevrolet Express 1500, 2009-2009 Chevrolet Silverado 1500, 2009-2009 Chevrolet Silverado 1500, 2009-2009 Chevrolet Silverado 1500, 2009-2009 Chevrolet Silverado 1500, 2009-2009 Chevrolet Silverado 3500 HD, 2009-2009 Chevrolet Suburban 2500, 2009-2009 Chevrolet Tahoe, 2009-2010 Chevrolet Silverado 1500, 2009-2010 Chevrolet Silverado 2500 HD, 2010-2010 Chevrolet Colorado, 2010-2010 Chevrolet Express 1500, 2010-2010 Chevrolet Silverado 1500, 2010-2010 Chevrolet Silverado 1500, 2010-2010 Chevrolet Silverado 1500, 2010-2010 Chevrolet Suburban 2500, 2011-2011 Chevrolet Silverado 1500, 2011-2011 Chevrolet Suburban 1500, 2005-2005 GMC Sierra 1500, 2005-2005 GMC Sierra 1500, 2005-2005 GMC Sierra 1500, 2005-2005 GMC Sierra 1500, 2005-2005 GMC Sierra 1500, 2005-2006 GMC Sierra 1500 HD, 2005-2006 GMC Sierra 3500, 2005-2007 GMC Sierra 1500, 2005-2007 GMC Sierra 1500, 2005-2007 GMC Sierra 2500 HD, 2006-2006 GMC Sierra 1500, 2006-2006 GMC Sierra 1500, 2006-2006 GMC Sierra 1500, 2006-2006 GMC Sierra 1500, 2006-2006 GMC Sierra 1500, 2006-2006 GMC Yukon XL 1500, 2007-2007 GMC Sierra 1500, 2007-2007 GMC Sierra 1500, 2007-2007 GMC Sierra 1500, 2007-2007 GMC Sierra 1500, 2007-2007 GMC Sierra 1500 Classic, 2007-2007 GMC Sierra 1500 Classic, 2007-2007 GMC Sierra 1500 Classic, 2007-2007 GMC Sierra 1500 Classic, 2007-2007 GMC Sierra 1500 Classic, 2007-2007 GMC Sierra 1500 Classic, 2007-2007 GMC Yukon, 2007-2007 GMC Yukon XL 1500, 2007-2007 GMC Yukon XL 1500, 2007-2009 GMC Envoy, 2007-2009 GMC Yukon XL 2500, 2007-2010 GMC Yukon, 2008-2008 GMC Sierra 1500, 2008-2008 GMC Sierra 1500, 2008-2008 GMC Sierra 1500, 2008-2008 GMC Sierra 2500 HD, 2008-2008 GMC Sierra 3500 HD, 2008-2008 GMC Yukon, 2008-2008 GMC Yukon XL 1500, 2008-2008 GMC Yukon XL 1500, 2008-2008 GMC Yukon XL 1500, 2008-2008 GMC Yukon XL 1500, 2008-2009 GMC Sierra 1500, 2008-2009 GMC Yukon, 2009-2009 GMC Savana 1500, 2009-2009 GMC Savana 1500, 2009-2009 GMC Savana 1500, 2009-2009 GMC Sierra 1500, 2009-2009 GMC Sierra 1500, 2009-2009 GMC Sierra 1500, 2009-2009 GMC Sierra 1500, 2009-2009 GMC Sierra 1500, 2009-2009 GMC Sierra 2500 HD, 2009-2009 GMC Sierra 3500 HD, 2009-2009 GMC Yukon, 2009-2009 GMC Yukon XL 1500, 2009-2010 GMC Canyon, 2010-2010 GMC Savana 1500, 2010-2010 GMC Savana 1500, 2010-2010 GMC Savana 1500, 2010-2010 GMC Sierra 1500, 2010-2010 GMC Sierra 1500, 2010-2010 GMC Sierra 1500, 2010-2010 GMC Sierra 1500, 2010-2010 GMC Sierra 2500 HD, 2010-2010 GMC Yukon, 2010-2010 GMC Yukon XL 1500, 2010-2010 GMC Yukon XL 1500, 2010-2010 GMC Yukon XL 2500, 2008-2009 Hummer H3, 2009-2009 Hummer H3T, 2008-2009 Isuzu NPR, 2007-2009 Saab 9-7x
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
8302603N, 10392759, 15200268, 15225927, 15263858, 15857609, 15905872, 25869451, 
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item #1001Q22N
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MPA 13889N Alternator
MPAPart # 13889N
MPA 13889N Alternator
4.33 Reviews
$218.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2005-2005 Saab 9-2X, 2000-2004 Subaru Legacy, 2001-2004 Subaru Outback, 2003-2005 Subaru Forester, 2003-2006 Subaru Baja, 2005-2005 Subaru Impreza, 2005-2005 Subaru Impreza
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
13889N, A2TB2891, 23700-AA370, 23700-AA37A, 19134416, 89037324, 32-00-6062, 13889
item #1001PWRG
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Alternator 90A 12V Clockwise 5-Groove Pulley A-Premium APALT1019
A-Premium®Part # APALT1019
Alternator 90A 12V Clockwise 5-Groove Pulley A-Premium APALT1019
4.7406 Reviews
$146.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2005 - 2005 Saab 9-2X, 2003 - 2006 Subaru Baja, 2003 - 2005 Subaru Forester, 2005 - 2005 Subaru Impreza, 2003 - 2004 Subaru Legacy, 2000 - 2002 Subaru Legacy, 2003 - 2004 Subaru Outback, 2000 - 2002 Subaru Outback
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
13889N, 13889, 23700AA370, 23700AA37A, 23700AA37AR1, 32006062, A002TB2891, A002TB2891ZC, 
...View more
item #1000GUL2
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Alternator 120A 12V Clockwise 5-Groove Pulley A-Premium APALT752
A-Premium®Part # APALT752
Alternator 120A 12V Clockwise 5-Groove Pulley A-Premium APALT752
4.7406 Reviews
$189.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2005 - 2005 Saab 9-3, 2006 - 2011 Saab 9-3, 2010 - 2011 Saab 9-3X
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
11279N, 11279, 12762730, 0124425056, 12762730
item #1000NDCW
Note
This item only fits models with automatic transmission.
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Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT574
A-Premium®Part # APALT574
Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT574
4.7406 Reviews
$130.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2004 - 2005 Buick Rainier, 2002 - 2005 Chevrolet Trailblazer, 2002 - 2005 GMC Envoy, 2002 - 2005 GMC Envoy XL, 2004 - 2005 GMC Envoy XUV, 2003 - 2005 Isuzu Ascender, 2002 - 2004 Oldsmobile Bravada, 2005 - 2005 Saab 9-7x
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
‎8104644680, 15062413, 10464468, 15062413, 15162839, 334-2527, 334-2527A, 3342527, 
...View more
item #10044NPZ
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Alternator 140A 14V 6-Groove Pulley A-Premium APALT1293
A-Premium®Part # APALT1293
Alternator 140A 14V 6-Groove Pulley A-Premium APALT1293
4.7406 Reviews
$204.99
Quantity Less than 2
Edit ZIP code
2-year warranty
90 days free return
Fits Year Make Model, 2002 - 2002 Saab 9-3, 2002 - 2002 Saab 9-3, 2002 - 2009 Saab 9-5, 2003 - 2003 Saab 9-3
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
0124525143, 12770124, ALB0272RB, 11454
ConditionNew
item #1016V737
Note
【Note-1】 140Amp, 14Volt, CW, 6-Groove Clutch Pulley.
【Note-2】 For Saab 9-3 2002, this item fits the model with SE model.
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Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT623
A-Premium®Part # APALT623
Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT623
4.7406 Reviews
$220.99
Only 1 item left in stock
Edit ZIP code
2-year warranty
90 days free return
Fits 2006 - 2006 Buick Rainier, 2006 - 2006 Chevrolet Trailblazer, 2006 - 2006 GMC Envoy, 2006 - 2006 GMC Envoy XL, 2006 - 2006 Isuzu Ascender, 2006 - 2006 Saab 9-7x
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
8497N, 8497, 15200110, 19118694, 8152001100
item #1003QNR1
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Alternator 120A 12V Clockwise 6-Groove Pulley A-Premium APALT843
A-Premium®Part # APALT843
Alternator 120A 12V Clockwise 6-Groove Pulley A-Premium APALT843
4.7406 Reviews
$166.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2011 - 2011 Buick Regal, 2011 - 2013 Buick Regal, 2011 - 2011 Saab 9-5
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
11650, 11650N, 22071, 849113, 13502591, 13588329, 2650745A, FGN12S116, 
...View more
item #10050HDU
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Alternator 90A 12V Clockwise 5-Groove Pulley A-Premium APALT716
A-Premium®Part # APALT716
Alternator 90A 12V Clockwise 5-Groove Pulley A-Premium APALT716
4.7406 Reviews
$134.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2006 - 2006 Saab 9-2X, 2006 - 2010 Subaru Forester, 2004 - 2005 Subaru Impreza, 2006 - 2006 Subaru Impreza, 2006 - 2006 Subaru Impreza, 2007 - 2010 Subaru Impreza
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Saab
Item LocatedUnited States
Quantity1
Part interchange
11058N, 11058, 23700AA380, 23700AA420, 23700AA540, 23700AA541, 32010646, A002TB3091, 
...View more
item #1000DGNT
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Page 1 of 2

What does a car alternator do?

The alternator keeps your automobile alive when the engine is running, however, the battery is necessary to start your car when it is not functioning. The majority of your car's electronic parts, such as the headlights, electric steering, power windows, windshield wipers, heated seats, dashboard gauges, and radio, are powered by the alternator while you're moving or idle. All of them receive direct current (DC) electricity from the alternator. Your car's battery is also charged while you're driving thanks to your alternator.

By converting mechanical energy into electrical energy, the alternator operates. When your engine is running, it drives a drive belt that is suspended from an alternator pulley. A set of magnets is spun around a coil by the alternator's rotor shaft, which is turned by the pulley. Alternating current (AC) is produced by these rotating magnets and circulated through the coil to the rectifier of the alternator. Your car's electrical systems are turned on by the rectifier, which transforms that AC power into DC power.

How does a car alternator work?

A car alternator is a device that converts mechanical energy into electrical energy. It is responsible for charging the battery and powering the electrical systems of the car. When the engine is running, the alternator is driven by a belt connected to the engine's crankshaft. Inside the alternator, there is a stationary magnetic field and a rotating coil of wire called the rotor. As the rotor spins, it generates an alternating current (AC) by electromagnetic induction.

The output of the alternator is regulated by a voltage regulator, which maintains a constant voltage output even as the engine speed varies. When the battery is fully charged, the voltage regulator reduces the output of the alternator to prevent overcharging the battery. When the engine is idling, the alternator output may not be enough to power all of the car's electrical systems, so the battery may be used to provide additional power. When the engine is running at higher speeds, the alternator output increases to meet the demand for electrical power.

Symptoms of alternator failure

  • Trouble starting or frequent stalling
  • Battery warning light on the dash
  • Dim or overly bright lights
  • Growling or whining noises
  • The smell of burning rubber or wires
  • Dead battery
  • Slow or malfunctioning accessories