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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 1973-1978 Buick RegalAlternator Rectifier Diode for 1973-1978 Buick Regal
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1973-1978 Buick Regal
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 #1015LHZ2
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
Show less
Alternator Rectifier Diode for 1986 Buick Somerset
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1986 Buick Somerset
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1986 Buick Somerset
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8YL
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 1963-1968 1970 Buick Skylark
A-Premium®Part # APALR168
Alternator Rectifier Diode for 1963-1968 1970 Buick Skylark
52 Reviews
$32.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Skylark: 1963 1964 1965 1966 1967 1968 1970
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LDAZ
Note
This item is a 12 Volt, 6-35A diode with 123 mm OD.
Show less
Alternator Rectifier Diode for 1985 Buick Somerset Regal
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1985 Buick Somerset Regal
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1985 Buick Somerset Regal
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8ZN
Note
【Note-1】 This item is a 12 Volt, 6–50A button diode with 80 mm OD.
【Note-2】 For 1983-1988 Oldsmobile Delta 88, this item fits for the Sedan model only, does not fit for the Coupe model.
Show less
Alternator Rectifier Diode for 1971-1973 Buick Centurion
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1971-1973 Buick Centurion
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 #1015LE6E
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
Show less
Alternator Rectifier Diode for 1983-1986 Buick Century
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1983-1986 Buick Century
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Century: 1983 1984 1985 1986
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8G7
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.
Show less
Alternator Rectifier Diode for 1962 1964-1967 Buick LeSabre
A-Premium®Part # APALR168
Alternator Rectifier Diode for 1962 1964-1967 Buick LeSabre
52 Reviews
$32.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick LeSabre: 1962 1964 1965 1966 1967
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LHQR
Note
This item is a 12 Volt, 6-35A diode with 123 mm OD.
Show less
Alternator Rectifier Diode for 1983-1987 Buick LeSabre
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1983-1987 Buick LeSabre
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick LeSabre: 1983 1984 1985 1986 1987
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L79D
Note
【Note-1】 This item is a 12 Volt, 6–50A button diode with 80 mm OD.
【Note-2】 For 1983-1988 Oldsmobile Delta 88, this item fits for the Sedan model only, does not fit for the Coupe model.
Show less
Alternator Rectifier Diode for 1971-1972 Buick GS
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1971-1972 Buick GS
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 #1015LHT8
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
Show less
Alternator Rectifier Diode for 1983-1986 Buick Skylark
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1983-1986 Buick Skylark
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Skylark: 1983 1984 1985 1986
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L933
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.
Show less
Alternator Rectifier Diode for 1971-1972 1975-1980 Buick Skylark
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1971-1972 1975-1980 Buick Skylark
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 #1015LDLW
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
Show less
Alternator Rectifier Diode for 1983-1987 Buick Century
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1983-1987 Buick Century
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Century: 1983 1984 1985 1986 1987
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L85Q
Note
【Note-1】 This item is a 12 Volt, 6–50A button diode with 80 mm OD.
【Note-2】 For 1983-1988 Oldsmobile Delta 88, this item fits for the Sedan model only, does not fit for the Coupe model.
Show less
Alternator Rectifier Diode for 1973-1980 Buick Century
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1973-1980 Buick Century
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 #1015LDWV
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
Show less
Alternator Rectifier Diode for 1973-1975 Buick Apollo
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1973-1975 Buick Apollo
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 #1015LDWC
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
Show less
Alternator Rectifier Diode for 1977-1979 Buick Opel
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1977-1979 Buick Opel
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 #1015LGER
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
Show less
Alternator Rectifier Diode for 1983-1987 Buick Skylark
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1983-1987 Buick Skylark
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Skylark: 1983 1984 1985 1986 1987
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L96C
Note
【Note-1】 This item is a 12 Volt, 6–50A button diode with 80 mm OD.
【Note-2】 For 1983-1988 Oldsmobile Delta 88, this item fits for the Sedan model only, does not fit for the Coupe model.
Show less
Alternator Rectifier Diode for 1986-1987 Buick Somerset
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1986-1987 Buick Somerset
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Somerset: 1986 1987
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Buick
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8S2
Note
【Note-1】 This item is a 12 Volt, 6–50A button diode with 80 mm OD.
【Note-2】 For 1983-1988 Oldsmobile Delta 88, this item fits for the Sedan model only, does not fit for the Coupe model.
Show less
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Page 3 of 3

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.

Related Categories

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Alternator
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