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Buick Alternator Rectifier Bridge

57 items

An alternator rectifier bridge uses diodes to convert alternating current into direct current for the vehicle's electrical system. Choose the bridge for the alternator design, comparing assembly layout, connections and mounting. It is a service component within the alternator rather than a complete alternator replacement.

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Alternator Rectifier Diode for 2000-2004 Buick LeSabreAlternator Rectifier Diode for 2000-2004 Buick LeSabre
A-Premium®Part # APALR039
Alternator Rectifier Diode for 2000-2004 Buick LeSabre
52 Reviews
$30.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick LeSabre: 2000 2001 2002 2003 2004
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Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #10183XY2
Note
12V, 116mm OD, 6-50A Avalanche Diodes, M6×53.5mm Battery Post
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Alternator Rectifier Diode with Aluminum Heat Sinks for 1994 Buick Park Avenue
A-Premium®Part # APALR172
Alternator Rectifier Diode with Aluminum Heat Sinks for 1994 Buick Park Avenue
52 Reviews
$26.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1994 Buick Park Avenue
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Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LAHP
Note
【Note-1】 This item is a 12 Volt, 6–35A avalanche press-fit diode with 102 mm OD and an M8×46 mm battery post.
【Note-2】 For GMC Safari, this item only fits the model with 100 or 105 Amp Alternator.
【Note-3】 For Lumina & Monte Carlo & Pontiac, this item only fits the model with 105 Amp Alternator.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 2008-2009 Buick Allure
A-Premium®Part # APALR130
Alternator Rectifier Diode with Aluminum Heat Sinks for 2008-2009 Buick Allure
52 Reviews
$39.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Allure: 2008 2009
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HNN7
Note
This item is a 12 Volt, 12–50A press-fit/avalanche diode with 117 mm OD and an M8×49 mm battery post.
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Alternator Rectifier Diode for 1996 Buick Park Avenue
A-Premium®Part # APALR043
Alternator Rectifier Diode for 1996 Buick Park Avenue
52 Reviews
$32.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1996 Buick Park Avenue
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015224P
Note
12 Volt, 118mm OD, Diodes: 6-50A Jumbo Avalanche Button.
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Alternator Rectifier Diode with Heat Sinks for 2004 Buick Regal
A-Premium®Part # APALR085
Alternator Rectifier Diode with Heat Sinks for 2004 Buick Regal
52 Reviews
$28.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2004 Buick Regal
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LC22
Note
【Note-1】 This item is a 12 Volt, 6–50A press-fit/avalanche diode with 129 mm OD, an M8×22 mm battery post (L), and an M8×50 mm battery post (R).
【Note-2】 This item comes with 129 mm negative heat sink.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 2006-2008 Buick Lucerne
A-Premium®Part # APALR009
Alternator Rectifier Diode with Aluminum Heat Sinks for 2006-2008 Buick Lucerne
52 Reviews
$57.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Lucerne: 2006 2007 2008
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #101524Y2
Note
【Note-1】 12 Volt, 117mm OD, 12-35A Avalanche Diodes, M6×34.5mm Battery Post.;
【Note-2】 This item comes with Aluminum Heat Sinks.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 2008-2009 Buick LaCrosse
A-Premium®Part # APALR130
Alternator Rectifier Diode with Aluminum Heat Sinks for 2008-2009 Buick LaCrosse
52 Reviews
$39.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick LaCrosse: 2008 2009
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HRRZ
Note
This item is a 12 Volt, 12–50A press-fit/avalanche diode with 117 mm OD and an M8×49 mm battery post.
Show less
Alternator Rectifier Diode for 1996-1999 Buick LeSabre
A-Premium®Part # APALR043
Alternator Rectifier Diode for 1996-1999 Buick LeSabre
52 Reviews
$32.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick LeSabre: 1996 1997 1998 1999
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #10152697
Note
12 Volt, 118mm OD, Diodes: 6-50A Jumbo Avalanche Button.
Show less
Alternator Rectifier Diode with Heat Sinks for 2005 Buick Allure
A-Premium®Part # APALR085
Alternator Rectifier Diode with Heat Sinks for 2005 Buick Allure
52 Reviews
$28.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2005 Buick Allure
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LC7W
Note
【Note-1】 This item is a 12 Volt, 6–50A press-fit/avalanche diode with 129 mm OD, an M8×22 mm battery post (L), and an M8×50 mm battery post (R).
【Note-2】 This item comes with 129 mm negative heat sink.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 2005 Buick LeSabre
A-Premium®Part # APALR009
Alternator Rectifier Diode with Aluminum Heat Sinks for 2005 Buick LeSabre
52 Reviews
$57.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2005 Buick LeSabre
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #101522H7
Note
【Note-1】 12 Volt, 117mm OD, 12-35A Avalanche Diodes, M6×34.5mm Battery Post.;
【Note-2】 This item comes with Aluminum Heat Sinks.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 2006-2011 Buick Lucerne
A-Premium®Part # APALR130
Alternator Rectifier Diode with Aluminum Heat Sinks for 2006-2011 Buick Lucerne
52 Reviews
$39.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Lucerne: 2006 2007 2008 2009 2010 2011
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HPVU
Note
This item is a 12 Volt, 12–50A press-fit/avalanche diode with 117 mm OD and an M8×49 mm battery post.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 1987-1988 Buick Skyhawk
A-Premium®Part # APALR165
Alternator Rectifier Diode with Aluminum Heat Sinks for 1987-1988 Buick Skyhawk
52 Reviews
$23.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HNDR
Note
【Note-1】 This item is a 12 Volt, 6-35A press-fit/avalanche diode with 100.3 mm OD.
【Note-2】 This item comes with aluminum heat sinks.
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Alternator Rectifier Diode with Heat Sinks for 2005 Buick LaCrosse
A-Premium®Part # APALR085
Alternator Rectifier Diode with Heat Sinks for 2005 Buick LaCrosse
52 Reviews
$28.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2005 Buick LaCrosse
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCTN
Note
【Note-1】 This item is a 12 Volt, 6–50A press-fit/avalanche diode with 129 mm OD, an M8×22 mm battery post (L), and an M8×50 mm battery post (R).
【Note-2】 This item comes with 129 mm negative heat sink.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 2004-2005 Buick Park Avenue
A-Premium®Part # APALR009
Alternator Rectifier Diode with Aluminum Heat Sinks for 2004-2005 Buick Park Avenue
52 Reviews
$57.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Park Avenue: 2004 2005
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #101523VC
Note
【Note-1】 12 Volt, 117mm OD, 12-35A Avalanche Diodes, M6×34.5mm Battery Post.;
【Note-2】 This item comes with Aluminum Heat Sinks.
Show less
Alternator Rectifier Diode for 1986 Buick LeSabre
A-Premium®Part # APALR070
Alternator Rectifier Diode for 1986 Buick LeSabre
52 Reviews
$31.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HL4Y
Note
This item is a 12 Volt, 3-50A press-fit/avalanche diode with 102 mm OD.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 1986-1987 1992-1993 Buick Skylark
A-Premium®Part # APALR165
Alternator Rectifier Diode with Aluminum Heat Sinks for 1986-1987 1992-1993 Buick Skylark
52 Reviews
$23.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Skylark: 1986 1987 1992 1993
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HPHT
Note
【Note-1】 This item is a 12 Volt, 6-35A press-fit/avalanche diode with 100.3 mm OD.
【Note-2】 This item comes with aluminum heat sinks.
Show less
Alternator Rectifier Diode for 1975-1980 Buick Skyhawk
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1975-1980 Buick Skyhawk
52 Reviews
$33.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LGH4
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
Show less
Alternator Rectifier Diode for 1983-1986 Buick Skyhawk
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1983-1986 Buick Skyhawk
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Skyhawk: 1983 1984 1985 1986
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LAV4
Note
【Note-1】 This item is a 12 Volt, 6–50A button diode with 94.9 mm OD.
【Note-2】 For 1984-1986 Oldsmobile Delta 88, this item fits for the Sedan model only, does not fit for the Coupe model.
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Alternator Rectifier Diode for 1986 Buick Century
A-Premium®Part # APALR070
Alternator Rectifier Diode for 1986 Buick Century
52 Reviews
$31.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HP5S
Note
This item is a 12 Volt, 3-50A press-fit/avalanche diode with 102 mm OD.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 1986-1987 Buick Somerset
A-Premium®Part # APALR165
Alternator Rectifier Diode with Aluminum Heat Sinks for 1986-1987 Buick Somerset
52 Reviews
$23.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HLT0
Note
【Note-1】 This item is a 12 Volt, 6-35A press-fit/avalanche diode with 100.3 mm OD.
【Note-2】 This item comes with aluminum heat sinks.
Show less
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Alternator Rectifier Bridges

An alternator rectifier bridge uses diodes to convert the alternator's alternating current into direct current for the vehicle's electrical system. It is one part of the alternator, rather than a complete replacement alternator.

A-Premium offers rectifier assemblies for selected alternators. Their size, connections and internal diode configuration can differ, so select a bridge for the specific alternator being repaired.

Choosing An Alternator Diode Bridge

Identify the alternator and compare the replacement's mounting shape, outside diameter and electrical connections. The vehicle application helps narrow the choices, but the rectifier must also match the alternator installed in the vehicle.

A charging warning or a weak battery does not identify a failed rectifier by itself. The battery, drive belt, wiring and voltage regulator are also part of the charging-system diagnosis.

Frequently Asked Questions (FAQ)

What is the difference between a rectifier and a voltage regulator?

The rectifier converts alternating current to direct current; the regulator controls alternator voltage for the operating conditions. They perform different jobs even when both are mounted on the alternator.

Can a faulty alternator diode drain the battery when parked?

A faulty diode can contribute to battery discharge while the vehicle is off. Other electrical loads and battery problems can also cause a drain, so the charging system needs a proper diagnosis.

Why does the battery-post size matter?

The post connects the charging output to the vehicle's electrical cable. Its diameter and length must suit the connection and available space; an M6 post and an M8 post are different mounting specifications.

What do the heat sinks on a rectifier do?

A heat sink helps transfer heat away from the electronic components. Some A-Premium bridge listings identify aluminum heat sinks, but the design and supplied parts vary by product.

Can I disconnect the battery while the engine runs to test charging?

Keep the battery connected while the alternator is operating. HELLA warns that disconnecting the battery or connections with the engine running can create voltage spikes and damage components; use the specified diagnostic procedure instead.

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