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Alternator

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Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT202Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT202
A-Premium®Part # APALT202
Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT202
4.7404 Reviews
$199.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2009 - 2011 Mazda Tribute, 2009 - 2011 Mercury Mariner, 2009 - 2012 Ford Escape, 2010 - 2011 Mercury Milan, 2010 - 2012 Ford Fusion
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
11411N, 11411, A2TX0391, A002TX0391, A002TX0391ZC, 9L8T10300AB, 9L8T10300AC, BE5T10300AA, 
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item #1003QGAT
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Alternator - Bosch AL598N
BoschPart # AL598N
Alternator - Bosch AL598N
4.622 Reviews
$265.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1991-1995 Ford Explorer, 1992-1992 Ford Ranger, 1992-1992 Ford Ranger, 1992-1992 Ford Ranger, 1992-1994 Ford Aerostar, 1993-1993 Ford Bronco, 1993-1996 Ford E-150 Econoline, 1993-1996 Ford E-150 Econoline, 1993-1996 Ford E-150 Econoline Club Wagon, 1993-1996 Ford E-150 Econoline Club Wagon, 1993-1996 Ford E-250 Econoline, 1993-1996 Ford E-350 Econoline, 1993-1996 Ford E-350 Econoline Club Wagon, 1993-1996 Ford F-150, 1993-1996 Ford F-150, 1993-1996 Ford F-250, 1993-1996 Ford F-250, 1993-1997 Ford F-350, 1993-2000 Ford Ranger, 1994-1994 Ford Bronco, 1994-1994 Ford Bronco, 1995-1996 Ford Bronco, 1995-1997 Ford Aerostar, 1996-1996 Ford Econoline Super Duty, 1996-2000 Ford Explorer, 1997-1997 Ford F-250 HD, 1997-2000 Ford F-150, 1997-2002 Ford E-150 Econoline, 1997-2002 Ford E-150 Econoline Club Wagon, 1997-2002 Ford E-250 Econoline, 1998-1998 Ford Ranger, 1998-1998 Ford Ranger, 2001-2001 Ford Ranger, 2001-2005 Ford Ranger, 2002-2002 Ford F-150, 2003-2003 Ford E-150, 2003-2003 Ford E-150 Club Wagon, 2003-2003 Ford E-250, 1991-1994 Mazda Navajo, 1994-1995 Mazda B3000, 1994-1995 Mazda B4000, 1994-1996 Mazda B2300, 1996-1996 Mazda B3000, 1996-2000 Mazda B4000, 1998-2003 Mazda B3000, 2002-2003 Mazda B4000, 2005-2005 Mazda B4000, 1997-1998 Mercury Tracer, 1999-1999 Mercury Tracer
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
AL598N, ZZL018301, ZZM018300B
item #1002C1HP
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Alternator - Bosch AL7537N
BoschPart # AL7537N
Alternator - Bosch AL7537N
4.622 Reviews
$265.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1995-1996 Ford Thunderbird, 1995-1997 Ford Crown Victoria, 1996-1996 Ford Mustang, 1996-1997 Ford Mustang, 1996-1998 Ford Mustang, 1996-1998 Ford Mustang, 1996-1998 Ford Mustang, 1997-1997 Ford Econoline Super Duty, 1997-1997 Ford Expedition, 1997-1997 Ford Expedition, 1997-1997 Ford F-150, 1997-1997 Ford F-150, 1997-1997 Ford F-250, 1997-1997 Ford F-250, 1997-1997 Ford Mustang, 1997-1997 Ford Mustang, 1997-1997 Ford Thunderbird, 1997-1998 Ford E-150 Econoline, 1997-1998 Ford E-150 Econoline Club Wagon, 1997-1998 Ford E-350 Econoline, 1997-1998 Ford E-350 Econoline, 1997-1998 Ford E-350 Econoline Club Wagon, 1997-1999 Ford Econoline Super Duty, 1997-2001 Ford E-150 Econoline, 1997-2001 Ford E-150 Econoline Club Wagon, 1997-2002 Ford E-250 Econoline, 1997-2002 Ford E-350 Econoline Club Wagon, 1998-1998 Ford Econoline Super Duty, 1998-1998 Ford Mustang, 1998-1998 Ford Mustang, 1998-1998 Ford Mustang, 1998-1999 Ford Crown Victoria, 1999-1999 Ford Econoline Super Duty, 1999-2000 Ford F-450 Super Duty, 1999-2001 Ford F-250 Super Duty, 1999-2001 Ford F-250 Super Duty, 1999-2001 Ford F-350 Super Duty, 1999-2001 Ford F-350 Super Duty, 1999-2001 Ford F-550 Super Duty, 1999-2002 Ford E-150 Econoline, 1999-2002 Ford E-150 Econoline Club Wagon, 1999-2002 Ford E-350 Econoline Club Wagon, 1999-2002 Ford E-350 Super Duty, 1999-2002 Ford E-450 Econoline Super Duty, 1999-2005 Ford E-350 Super Duty, 2000-2001 Ford E-450 Econoline Super Duty, 2000-2001 Ford Excursion, 2000-2001 Ford Excursion, 2001-2001 Ford F-450 Super Duty, 2002-2002 Ford E-150 Econoline, 2002-2002 Ford E-150 Econoline Club Wagon, 2002-2002 Ford E-450 Econoline Super Duty, 2002-2002 Ford E-550 Econoline Super Duty, 2003-2003 Ford E-150, 2003-2003 Ford E-150 Club Wagon, 2003-2003 Ford E-150 Club Wagon, 2003-2003 Ford E-350 Club Wagon, 2003-2003 Ford E-450 Super Duty, 2003-2003 Ford E-550 Super Duty, 2003-2004 Ford E-150, 2003-2004 Ford E-250, 2003-2004 Ford E-250, 2003-2004 Ford E-350 Super Duty, 2003-2005 Ford E-350 Club Wagon, 2003-2006 Ford E-450 Super Duty, 2004-2004 Ford E-150, 2004-2004 Ford E-450 Super Duty, 2004-2004 Ford F-250 Super Duty, 2004-2004 Ford F-250 Super Duty, 2004-2004 Ford F-350 Super Duty, 2004-2004 Ford F-350 Super Duty, 2004-2005 Ford E-150 Club Wagon, 2004-2005 Ford Excursion, 2004-2005 Ford Excursion, 2005-2005 Ford E-150, 2005-2005 Ford E-350 Club Wagon, 2005-2006 Ford E-250, 2005-2006 Ford E-350 Super Duty, 2006-2006 Ford E-150, 1996-1997 Lincoln Town Car, 1998-1998 Lincoln Town Car, 1998-1998 Lincoln Town Car, 1995-1997 Mercury Cougar, 1995-1997 Mercury Grand Marquis, 2002-2005 Mercury Mountaineer
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
AL7537N
item #1002CH2Z
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Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT1178
A-Premium®Part # APALT1178
Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT1178
4.7404 Reviews
$270.99
Quantity Less than 3
Edit ZIP code
2-year warranty
90 days free return
Fits 2009 - 2010 Ford Explorer, 2009 - 2010 Ford Explorer Sport Trac, 2009 - 2010 Mercury Mountaineer
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
11433, 104210-5850, 9L2Z-10346-A, 9L2T-10300-AA
item #100215XR
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Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT138
A-Premium®Part # APALT138
Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT138
4.7404 Reviews
$294.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2008 - 2008 Ford Escape, 2008 - 2008 Mazda Tribute, 2008 - 2008 Mercury Mariner
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
11270N, 11270, 8L8Z-10346-A, 8L8Z-10346-C, 8L8T-10300-AA, ZZC6-18-300, ZZC8-18-300
item #1003QD8T
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Alternator 130A 12V Clockwise 6-Groove Pulley A-Premium APALT649
A-Premium®Part # APALT649
Alternator 130A 12V Clockwise 6-Groove Pulley A-Premium APALT649
4.7404 Reviews
$135.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2002 - 2004 Ford Explorer, 2001 - 2004 Ford Explorer Sport Trac, 2001 - 2004 Mercury Mountaineer
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
7787N-6G1, 7787, 112946, 1L2UAA, 1L2UAB, 1L2U10300AA, 1L2U10300AB, 1L2Z10346AA, 
...View more
item #1003QZWU
Note
【Note-1】: This item comes with 130 Amp/12 Volt, Clockwise, 6-Groove.
【Note-2】: This item comes with Black cover on Alternator.
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Alternator - Bosch AL7599N
BoschPart # AL7599N
Alternator - Bosch AL7599N
4.622 Reviews
$312.99
Quantity Less than 3
Edit ZIP code
3-year warranty
90 days free return
Fits 2002-2004 Ford Taurus, 2002-2004 Ford Taurus, 2002-2005 Ford Taurus, 2002-2005 Ford Taurus, 2003-2003 Ford Taurus, 2003-2003 Ford Taurus, 2003-2005 Ford Taurus, 2003-2005 Ford Taurus, 2006-2007 Ford Taurus, 2002-2002 Mercury Sable, 2002-2005 Mercury Sable
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
AL7599N
item #1002CNK6
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Alternator - Bosch AL7508N
BoschPart # AL7508N
Alternator - Bosch AL7508N
4.622 Reviews
$271.99
Only 1 item left in stock
Edit ZIP code
3-year warranty
90 days free return
Fits 1990-1990 Ford Taurus, 1991-1991 Ford Taurus, 1992-1995 Ford Taurus, 1991-1991 Lincoln Continental, 1992-1994 Lincoln Continental, 1990-1990 Mercury Sable, 1991-1991 Mercury Sable, 1992-1995 Mercury Sable
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
AL7508N
item #1002C5NT
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MPA 7732602N Alternator
MPAPart # 7732602N
MPA 7732602N Alternator
4.33 Reviews
$124.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1985-1985 Ford Tempo, 1986-1986 Ford Aerostar, 1986-1986 Ford Bronco II, 1986-1989 Ford Ranger, 1987-1987 Ford Bronco, 1987-1989 Ford Bronco, 1987-1989 Ford Bronco II, 1987-1989 Ford F-150, 1987-1989 Ford F-250, 1987-1989 Ford F-350, 1988-1989 Ford Bronco, 1988-1989 Ford Bronco, 1990-1990 Ford Bronco II, 1990-1990 Ford F-350, 1990-1990 Ford Ranger, 1990-1991 Ford F-250, 1990-1992 Ford Bronco, 1990-1992 Ford F-150, 1991-1991 Ford Ranger, 1991-1993 Ford F-350, 1992-1992 Ford F-250, 1992-1992 Ford Ranger, 1993-1993 Ford F-150, 1993-1993 Ford F-250, 1994-1994 Ford F-150, 1994-1994 Ford F-250, 1994-1994 Ford F-350, 1984-1985 Mercury Topaz
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
7732602N, 19135788, 19020569, 19135786, E8PF-10346-DA, E8TF-10300-CA, E87F-10300-BA, E8PZ-10346-C, 
...View more
item #1001Q238
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Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT082
A-Premium®Part # APALT082
Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT082
4.7404 Reviews
$226.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2006 - 2009 Ford Fusion, 2006 - 2009 Mercury Milan
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
11172N, 11172, A3TJ0891, A003TJ0891, A3TJ0891ZC, 6E5T-10300-AB, 6E5T-10300-AD, 6E5Z-10346-AA, 
...View more
item #1003R7PS
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Alternator - Bosch AL7529N
BoschPart # AL7529N
Alternator - Bosch AL7529N
4.622 Reviews
$279.99
Quantity Less than 3
Edit ZIP code
3-year warranty
90 days free return
Fits 1993-1993 Ford Taurus, 1995-1997 Ford Windstar, 1996-1997 Ford Taurus, 1996-1997 Ford Taurus, 1998-1998 Ford Taurus, 1998-1998 Ford Taurus, 1998-1998 Ford Taurus, 1998-1998 Ford Windstar, 1999-1999 Ford Taurus, 1999-1999 Ford Taurus, 1999-1999 Ford Taurus, 1993-1995 Mercury Sable, 1996-1996 Mercury Sable, 1996-1997 Mercury Sable, 1996-1999 Mercury Sable, 1996-1999 Mercury Sable, 1996-1999 Mercury Sable, 1998-1998 Mercury Sable, 1998-1998 Mercury Sable
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
AL7529N
item #1002CGQL
Show less
Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT137
A-Premium®Part # APALT137
Alternator 150A 12V Clockwise 6-Groove Pulley A-Premium APALT137
4.7404 Reviews
$248.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2008 - 2008 Ford Escape, 2008 - 2008 Mazda Tribute, 2008 - 2008 Mercury Mariner
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
11269N, 11269, A3TJ2191, A003TJ2191, A003TJ2191ZC, 8L8T-10300-CA, 8L8Z-10346-B
item #1003R7TQ
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Alternator - Bosch AL7600N
BoschPart # AL7600N
Alternator - Bosch AL7600N
4.622 Reviews
$292.99
Only 1 item left in stock
Edit ZIP code
3-year warranty
90 days free return
Fits 2002-2002 Ford Taurus, 2002-2004 Ford Taurus, 2002-2005 Ford Taurus, 2002-2005 Ford Taurus, 2003-2003 Ford Taurus, 2003-2003 Ford Taurus, 2003-2005 Ford Taurus, 2003-2005 Ford Taurus, 2002-2002 Mercury Sable, 2002-2002 Mercury Sable, 2003-2005 Mercury Sable, 2003-2005 Mercury Sable, 2004-2004 Mercury Sable, 2004-2004 Mercury Sable
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
AL7600N
item #1002CN84
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MPA 7787604N Alternator
MPAPart # 7787604N
MPA 7787604N Alternator
4.33 Reviews
$204.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1996-2000 Ford Explorer, 1997-1999 Ford Explorer, 1997-2000 Ford Explorer, 1997-2000 Ford Explorer, 1997-2000 Ford Explorer, 1997-2000 Ford Explorer, 1999-2000 Ford Explorer, 2000-2000 Ford Explorer, 2000-2000 Ford Explorer, 2001-2001 Ford Explorer, 2001-2003 Ford Explorer Sport, 2001-2003 Ford Explorer Sport Trac, 2002-2003 Ford Explorer, 2004-2004 Ford Explorer, 2004-2004 Ford Explorer Sport Trac, 2005-2006 Ford GT, 1997-1997 Mercury Mountaineer, 1998-2001 Mercury Mountaineer, 1998-2003 Mercury Mountaineer, 2004-2004 Mercury Mountaineer
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
7787604N, 19135828, 88864236, 89037375, 4G7U-10300-AA, 4G7Z-10346-AA, F77U-10300-AB, F77U-10300-AC, 
...View more
item #1001Q4C1
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Alternator 125A 12V Clockwise 5-Groove Pulley A-Premium APALT998
A-Premium®Part # APALT998
Alternator 125A 12V Clockwise 5-Groove Pulley A-Premium APALT998
4.7404 Reviews
$175.99
Edit ZIP code
2-year warranty
90 days free return
Fits 1999 - 2002 Nissan Quest, 1999 - 2002 Mercury Villager
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
13821N, 13821, 231007B000, XF5210300AC, XF52AC, XF5Z10346AA, XF5Z10346AARM, A003TA5691, 
...View more
item #1000DLXC
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Alternator 130A 12V Clockwise 6-Groove Pulley A-Premium APALT467
A-Premium®Part # APALT467
Alternator 130A 12V Clockwise 6-Groove Pulley A-Premium APALT467
4.7404 Reviews
$129.99
Edit ZIP code
2-year warranty
90 days free return
Fits 1994 - 1997 Ford Thunderbird, 1994 - 1997 Mercury Cougar, 1994 - 2000 Ford Mustang
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
ColorSilver
Part interchange
7771N-6G2, 7771, 112933, F4PU10346BA, F4PZ10346B, F4PZ10346BRM, F4SU10300AB, F4SUAB, 
...View more
item #1003N5H3
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Alternator 130A 12V Clockwise 6-Groove Pulley A-Premium APALT474
A-Premium®Part # APALT474
Alternator 130A 12V Clockwise 6-Groove Pulley A-Premium APALT474
4.7404 Reviews
$157.99
Quantity Less than 2
Edit ZIP code
2-year warranty
90 days free return
Fits 1999 - 2001 Mercury Cougar, 1995 - 2000 Ford Contour, 1995 - 2000 Mercury Mystique
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
7775N, 7775, 112939, LRB271, 96BB10300AA
item #10050D0L
Note
【Note-1】 This item comes with 130 Amp/12V, Clockwise Rotation, 6-Groove Pulley.
【Note-2】 For Cougar, this item fits the model built To 1/2001.
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Alternator 130A 12V Clockwise 6-Groove Pulley A-Premium APALT802
A-Premium®Part # APALT802
Alternator 130A 12V Clockwise 6-Groove Pulley A-Premium APALT802
4.7404 Reviews
$187.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2010 - 2011 Ford Crown Victoria, 2009 - 2009 Ford E-150, 2010 - 2010 Ford E-150, 2010 - 2011 Ford E-150, 2009 - 2009 Ford E-250, 2010 - 2010 Ford E-250, 2010 - 2011 Ford E-250, 2009 - 2009 Ford E-350 Super Duty, 2009 - 2009 Ford E-350 Super Duty, 2010 - 2010 Ford E-350 Super Duty, 2010 - 2010 Ford E-350 Super Duty, 2009 - 2009 Ford E-450 Super Duty, 2009 - 2009 Ford E-450 Super Duty, 2010 - 2010 Ford E-450 Super Duty, 2010 - 2010 Ford E-450 Super Duty, 2010 - 2011 Lincoln Town Car, 2010 - 2010 Mercury Grand Marquis, 2011 - 2011 Mercury Grand Marquis
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
11527N, 11527, AW7T10300AA, AW7Z10346A, 1042101270
item #1000DEZZ
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Alternator 130A 12V Clockwise 6-Groove Pulley A-Premium APALT470
A-Premium®Part # APALT470
Alternator 130A 12V Clockwise 6-Groove Pulley A-Premium APALT470
4.7404 Reviews
$137.99
Quantity Less than 3
Edit ZIP code
2-year warranty
90 days free return
Fits 1994 - 1994 Mercury Cougar, 1993 - 1994 Ford Crown Victoria, 2004 - 2006 Ford E-150, 2007 - 2008 Ford E-150, 2004 - 2006 Ford E-150, 2007 - 2008 Ford E-150, 2004 - 2005 Ford E-150 Club Wagon, 2004 - 2005 Ford E-150 Club Wagon, 2004 - 2006 Ford E-250, 2007 - 2008 Ford E-250, 2004 - 2006 Ford E-250, 2007 - 2008 Ford E-250, 2004 - 2005 Ford E-350 Club Wagon, 2005 - 2005 Ford E-350 Club Wagon, 2004 - 2006 Ford E-350 Super Duty, 2007 - 2008 Ford E-350 Super Duty, 2004 - 2006 Ford E-350 Super Duty, 2007 - 2008 Ford E-350 Super Duty, 2004 - 2004 Ford E-450 Super Duty, 2006 - 2006 Ford E-450 Super Duty, 2007 - 2008 Ford E-450 Super Duty, 2004 - 2006 Ford E-450 Super Duty, 2007 - 2008 Ford E-450 Super Duty, 1994 - 1994 Ford Thunderbird, 1992 - 1992 Lincoln Town Car, 1993 - 1995 Lincoln Town Car
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
7764N-6G, 7764, 112927, 112962, 5C2T10300BC, 5C2TBC, 5C2Z10346AA, 5C2Z10346BA, 
...View more
item #10044C6E
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Alternator 110A 12V Clockwise 5-Groove Pulley A-Premium APALT922
A-Premium®Part # APALT922
Alternator 110A 12V Clockwise 5-Groove Pulley A-Premium APALT922
4.7404 Reviews
$143.99
Quantity Less than 4
Edit ZIP code
2-year warranty
90 days free return
Fits 1993 - 1998 Mercury Villager, 1993 - 1998 Nissan Quest
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mercury
Item LocatedUnited States
Quantity1
Part interchange
13473N, 13473, 231000B000, 231001B000, F3XA10300AB, F3XA10300AC, F3XAAB, F3XAAC, 
...View more
item #1000DP9Q
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Page 1 of 8

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 

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