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Replacement and OEM Parts for Alternator Pulley
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Alternator Pulley

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Alternators, Batteries & Starters
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637 Products found

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  • OEM (Genuine) Pulley

    PartNumber: 31141-RAA-A01
    OEM Pulley - 31141-RAA-A01
    Product Specifications
    • Item Dimensions: 5.4 x 4.8 x 3.9 inches
    • Item Weight: 0.90 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: Pulley
    More Info
    $57.40 MSRP: $81.08
    You Save: $23.68 (30%)
  • Dorman Alternator Pulley - 300-877

    Dorman® Alternator Pulley

    PartNumber: 300-877
    Product Specifications
    • Attachment Type: Bolt-on
    • Bore Size: 0.67
    • Contact Surface Material: Steel
    • Finish: Black
    • Flanged End: No
    • Installation Hardware Included: No
    • Outside Diameter: 2.4
    • Oversized Pulley: No
    • Package Contents: 1 Alternator Pulley
    • Undersized Pulley: No
    • UPC: 037495704977
    • Part Description: Alternator Pulley
    More Info
    $251.56
  • Gates Alternator Decoupler Pulley - 37174P

    Gates® Alternator Decoupler Pulley

    PartNumber: 37174P
    Product Specifications
    • Bore Diameter: 17
    • Contact Surface: V-Ribbed Grooved
    • Contents: Pulley, Dust Cap
    • Description: Alternator Decoupler Pulley
    • Flanged: Yes
    • Groove Quantity: 6
    • Material: Steel
    • OE Comparison Rating: OE Exact
    • Outside Diameter: 58
    • Required Tool Part Number: 91024-1
    • UPC: 770075566281
    • Width: 40.5
    • Part Description: Alternator Decoupler Pulley
    More Info
    $175.09
  • Dayco Alternator Decoupler Pulley - 892008

    Dayco® Alternator Decoupler Pulley

    PartNumber: 892008
    Product Specifications
    • UPC: 036687815392
    • Part Description: Alternator Decoupler Pulley
    $121.24
  • OEM (Genuine) Pulley Complete Decou

    PartNumber: 31141-5X6-J01
    OEM Pulley Complete Decou - 31141-5X6-J01
    Product Specifications
    • Item Dimensions: 4.4 x 4.6 x 4.5 inches
    • Item Weight: 1.50 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: Pulley Complete Decou
    More Info
    $87.14 MSRP: $123.10
    You Save: $35.96 (30%)
  • Dayco Alternator Decoupler Pulley - 892015

    Dayco® Alternator Decoupler Pulley

    PartNumber: 892015
    Product Specifications
    • UPC: 036687821928
    • Part Description: Alternator Decoupler Pulley
    $112.75
  • OEM (Genuine) Pulley Complete, Decou

    PartNumber: 31141-5A2-A01
    OEM Pulley Complete, Decou - 31141-5A2-A01
    Product Specifications
    • Item Dimensions: 2.6 x 2.5 x 1.5 inches
    • Item Weight: 1.60 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: Pulley Complete, Decou
    More Info
    $92.23 MSRP: $130.28
    You Save: $38.05 (30%)
  • Dorman Alternator Pulley - 300-871

    Dorman® Alternator Pulley

    PartNumber: 300-871
    Product Specifications
    • Attachment Type: Bolt-on
    • Bore Size: 0.67
    • Contact Surface Material: Steel
    • Finish: Black
    • Flanged End: No
    • Installation Hardware Included: No
    • Outside Diameter: 2.17
    • Oversized Pulley: No
    • Package Contents: 1 Alternator Pulley
    • Undersized Pulley: No
    • UPC: 037495704915
    • Part Description: Alternator Pulley
    More Info
    $110.61
  • Dayco Alternator Decoupler Pulley - 892009

    Dayco® Alternator Decoupler Pulley

    PartNumber: 892009
    Product Specifications
    • UPC: 036687815415
    • Part Description: Alternator Decoupler Pulley
    $130.19
  • OEM (Genuine) Pulley

    PartNumber: FO7Z-10344-A
    OEM Pulley - FO7Z-10344-A
    Product Specifications
    • Item Dimensions: 3.2 x 1.3 x 3.3 inches
    • Item Weight: 0.90 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: Pulley
    More Info
    $9.50 MSRP: $14.87
    You Save: $5.37 (37%)
  • Dorman Alternator Pulley - 300-868

    Dorman® Alternator Pulley

    PartNumber: 300-868
    Product Specifications
    • Attachment Type: Bolt-on
    • Bore Size: 0.67
    • Contact Surface Material: Steel
    • Finish: Black
    • Flanged End: No
    • Installation Hardware Included: No
    • Outside Diameter: 2.43
    • Oversized Pulley: No
    • Package Contents: 1 Alternator Pulley
    • Undersized Pulley: No
    • UPC: 037495704885
    • Part Description: Alternator Pulley
    More Info
    $110.21
  • Gates Alternator Decoupler Pulley - 37165P

    Gates® Alternator Decoupler Pulley

    PartNumber: 37165P
    Product Specifications
    • Bore Diameter: 17
    • Contact Surface: V-Ribbed Grooved
    • Contents: Pulley, Dust Cap
    • Description: One-Way Clutch Decoupler Pulley
    • Flanged: Yes
    • Groove Quantity: 6
    • Material: Steel
    • OE Comparison Rating: OE Exact
    • Outside Diameter: 60
    • Required Tool Part Number: 91024-1
    • UPC: 770075608363
    • Width: 37.5
    • Part Description: Alternator Decoupler Pulley
    More Info
    $140.92
  • OEM (Genuine) Pulley, Decoupler

    PartNumber: 31141-RV0-A01
    OEM Pulley, Decoupler - 31141-RV0-A01
    Product Specifications
    • Other Names: Pulley
    • Item Dimensions: 3.1 x 2.9 x 1.8 inches
    • Item Weight: 1.90 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: Pulley, Decoupler
    More Info
    $87.49 MSRP: $123.58
    You Save: $36.09 (30%)
  • Dorman Alternator Pulley - 300-881

    Dorman® Alternator Pulley

    PartNumber: 300-881
    Product Specifications
    • Attachment Type: Bolt-on
    • Bore Size: 0.67
    • Contact Surface Material: Steel
    • Finish: Black
    • Flanged End: No
    • Installation Hardware Included: No
    • Outside Diameter: 2.4
    • Oversized Pulley: No
    • Package Contents: 1 Alternator Pulley
    • Undersized Pulley: No
    • UPC: 037495705004
    • Part Description: Alternator Pulley
    More Info
    $106.95
  • Gates Alternator Decoupler Pulley - 37103P

    Gates® Alternator Decoupler Pulley

    PartNumber: 37103P
    Product Specifications
    • Bore Diameter: 17
    • Contact Surface: V-Ribbed Grooved
    • Contents: Pulley, Dust Cap
    • Description: Alternator Decoupler Pulley
    • Flanged: Yes
    • Groove Quantity: 6
    • Material: Steel
    • OE Comparison Rating: OE Exact
    • Outside Diameter: 55
    • UPC: 770075461234
    • Width: 40.5
    • Part Description: Alternator Decoupler Pulley
    More Info
    $141.69
  • Dayco Alternator Decoupler Pulley - 892014

    Dayco® Alternator Decoupler Pulley

    PartNumber: 892014
    Product Specifications
    • UPC: 036687821904
    • Part Description: Alternator Decoupler Pulley
    $70.79
  • OEM (Genuine) Pulley-Idler

    PartNumber: 11927-AL500
    OEM Pulley-Idler - 11927-AL500
    Product Specifications
    • Other Names: Idler Pulley, Tension Pulley
    • Item Dimensions: 4.0 x 3.8 x 1.7 inches
    • Item Weight: 1.70 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: Pulley-Idler
    More Info
    $54.08 MSRP: $74.20
    You Save: $20.12 (28%)
  • Dorman Alternator Pulley - 300-857

    Dorman® Alternator Pulley

    PartNumber: 300-857
    Product Specifications
    • Attachment Type: Bolt-on
    • Bore Size: 0.57
    • Contact Surface Material: Steel
    • Finish: Black
    • Flanged End: No
    • Installation Hardware Included: No
    • Outside Diameter: 2.52
    • Oversized Pulley: No
    • Package Contents: 1 Alternator Clutch Pulley
    • Undersized Pulley: No
    • UPC: 019495487722
    • Part Description: Alternator Pulley
    More Info
    $97.08
  • Gates Alternator Decoupler Pulley - 37112P

    Gates® Alternator Decoupler Pulley

    PartNumber: 37112P
    Product Specifications
    • Bore Diameter: 17
    • Contact Surface: V-Ribbed Grooved
    • Contents: Pulley, Dust Cap
    • Description: Alternator Decoupler Pulley
    • Flanged: N/A
    • Groove Quantity: 6
    • Material: Steel
    • OE Comparison Rating: OE Exact
    • Outside Diameter: 52
    • UPC: 770075510642
    • Width: 41.5
    • Part Description: Alternator Decoupler Pulley
    More Info
    $125.27
  • OEM (Genuine) Pulley

    PartNumber: 31141-RGM-A01
    OEM Pulley - 31141-RGM-A01
    Product Specifications
    • Item Dimensions: 4.5 x 3.3 x 2.3 inches
    • Item Weight: 1.00 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: Pulley
    More Info
    $40.46 MSRP: $57.17
    You Save: $16.71 (30%)
  • Dorman Alternator Pulley - 300-873

    Dorman® Alternator Pulley

    PartNumber: 300-873
    Product Specifications
    • Attachment Type: Bolt-on
    • Bore Size: 0.67
    • Contact Surface Material: Steel
    • Finish: Black
    • Flanged End: No
    • Installation Hardware Included: No
    • Outside Diameter: 2.43
    • Oversized Pulley: No
    • Package Contents: 1 Alternator Pulley
    • Undersized Pulley: No
    • UPC: 037495704939
    • Part Description: Alternator Pulley
    More Info
    $96.98
  • Dayco Alternator Decoupler Pulley - 892005

    Dayco® Alternator Decoupler Pulley

    PartNumber: 892005
    Product Specifications
    • UPC: 036687815330
    • Part Description: Alternator Decoupler Pulley
    $58.07
  • OEM (Genuine) Pulley

    PartNumber: 31141-RNA-A01
    OEM Pulley - 31141-RNA-A01
    Product Specifications
    • Item Dimensions: 2.5 x 2.7 x 1.6 inches
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: Pulley
    More Info
    $37.34 MSRP: $52.75
    You Save: $15.41 (30%)
  • Dorman Alternator Pulley - 300-875

    Dorman® Alternator Pulley

    PartNumber: 300-875
    Product Specifications
    • Attachment Type: Bolt-on
    • Bore Size: 0.67
    • Contact Surface Material: Steel
    • Finish: Black
    • Flanged End: No
    • Installation Hardware Included: No
    • Outside Diameter: 2.43
    • Oversized Pulley: No
    • Package Contents: 1 Alternator Pulley
    • Undersized Pulley: No
    • UPC: 037495704953
    • Part Description: Alternator Pulley
    More Info
    $145.45
  • Dorman Alternator Pulley - 300-883

    Dorman® Alternator Pulley

    PartNumber: 300-883
    Product Specifications
    • Attachment Type: Bolt-on
    • Bore Size: 0.67
    • Contact Surface Material: Steel
    • Finish: Black
    • Flanged End: No
    • Installation Hardware Included: No
    • Outside Diameter: 2.4
    • Oversized Pulley: No
    • Package Contents: 1 Alternator Pulley
    • Undersized Pulley: No
    • UPC: 037495705028
    • Part Description: Alternator Pulley
    More Info
    $96.51
  • Dayco Alternator Decoupler Pulley - 892003

    Dayco® Alternator Decoupler Pulley

    PartNumber: 892003
    Product Specifications
    • UPC: 036687815293
    • Part Description: Alternator Decoupler Pulley
    $55.77
  • OEM (Genuine) Pulley

    PartNumber: 27415-0T031
    OEM Pulley - 27415-0T031
    Product Specifications
    • Other Names: Pulley
    • Item Weight: 1.00 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: Pulley
    More Info
    $86.36 MSRP: $125.47
    You Save: $39.11 (32%)
  • Dorman Alternator Pulley - 300-862

    Dorman® Alternator Pulley

    PartNumber: 300-862
    Product Specifications
    • Attachment Type: Bolt-on
    • Bore Size: 0.67
    • Contact Surface Material: Steel
    • Finish: Black
    • Flanged End: No
    • Installation Hardware Included: No
    • Outside Diameter: 2.17
    • Oversized Pulley: No
    • Package Contents: 1 Alternator Pulley
    • Undersized Pulley: No
    • UPC: 037495704847
    • Part Description: Alternator Pulley
    More Info
    $95.79
  • Gates Alternator Decoupler Pulley - 37010P

    Gates® Alternator Decoupler Pulley

    PartNumber: 37010P
    Product Specifications
    • Bore Diameter: 14.5
    • Contact Surface: V-Ribbed Grooved
    • Contents: Pulley, Dust Cap
    • Description: One-Way Clutch Decoupler Pulley
    • Flanged: N/A
    • Groove Quantity: 6
    • Material: Steel
    • OE Comparison Rating: OE Exact
    • Outside Diameter: 50
    • Required Tool Part Number: 91024-1
    • UPC: 072053497083
    • Width: 40.5
    • Part Description: Alternator Decoupler Pulley
    More Info
    $106.77
  • OEM (Genuine) Pulley

    PartNumber: 27411-28060
    OEM Pulley - 27411-28060
    Product Specifications
    • Item Weight: 0.80 Pounds
    • Part Description: Pulley
    $25.93 MSRP: $37.35
    You Save: $11.42 (31%)
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About Alternator Pulley

The alternator pulley is a component that allows the vehicle's alternator to be controlled by a belt. Whether it be a v-type belt or a serpentine drive belt, the alternator gets the current it needs from the belt's rotation.

Alternator pulley principles

The purpose of the alternator is to supply a charging procedure for the vehicle's electronics. The alternator that is in every vehicle is operated by a belt, and any type of fan belt the user uses will be compatible with the alternator pulley. The alternator pulley is usually attached to the main shaft of the alternator.

The use of the alternator pulley is to transfer torque to the alternator. Modern cars use a single belt to drive all the parts, while older vehicles need a total of three separate belts. With an increase in features that are power-operated, the workload for the alternator has intensified. This leads to a bigger and more powerful alternator, but it also requires a different drive system.

Common issues with the alternator pulley

A bad alternator pulley can lead to vibrations and noises may occur.