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Our office will be closed 9/7/2026 in observance of Labor Day. Orders placed during this time will be processed when our office opens 9/8/2026.

Our office will be closed 9/7/2026 in observance of Labor Day. Orders placed during this time will be processed when our office opens 9/8/2026.

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12 Volt Alternators for John Deere Engines 105 Amp and Above

Diesel Parts Direct carries a great selection of new and remanufactured 12 Volt alternators ranging from 105 to 140 Amp for John Deere diesel engines, including 15SI, 21SI, K1, and N1 models.

If you do not see the part you are looking for, please use our quote request form or call us at 888.687.0539: our knowledgeable inside sales staff will gladly assist you.

DS-AE52707

ALTERNATOR - K1 (12V, 120A)

Also Available in Remanufactured

$376.97

DS-AT117390

ALTERNATOR - 15SI (12V, 105A)

Also Available in Remanufactured

$384.41

DS-AT142246

ALTERNATOR - 21SI (12V, 130A, INTERNAL REGULATOR, EXTERNAL FAN)

Also Available in Remanufactured

$345.11

DS-AT175839

ALTERNATOR - N1 (12V, 135A)

Also Available in Remanufactured

$620.78

DS-AT185951

ALTERNATOR - K1 (12V, 120A)

Also Available in Remanufactured

$376.97

DS-F123188

ALTERNATOR - N1 (12V, 135A)

Also Available in Remanufactured

$620.78

DS-RE36246

ALTERNATOR (12V, 120A)

Also Available in Remanufactured

$451.15

DS-RE36268

ALTERNATOR - N1 (12V, 135A)

Also Available in Remanufactured

$620.78

DS-RE37201

ALTERNATOR (12V, 120A)

Also Available in Remanufactured

$451.15

DS-RE42123

ALTERNATOR (12V, 120A)

Also Available in Remanufactured

$451.15

DS-RE44140

ALTERNATOR (12V, 120A)

Also Available in Remanufactured

$451.15

DS-RE500226

ALTERNATOR (12V, 140A, INTERNAL REGULATOR, INTERNAL FAN)

$731.60

DS-RE501112

ALTERNATOR - 15SI (12V, 105A)

Also Available in Remanufactured

$384.41

DS-RE51921

ALTERNATOR (12V, 120A)

Also Available in Remanufactured

$451.15

DS-RE51922

ALTERNATOR (12V, 120A)

Also Available in Remanufactured

$451.15

DS-TY24486

ALTERNATOR - K1 (12V, 120A)

Also Available in Remanufactured

$376.97

DS-TY25956

ALTERNATOR - N1 (12V, 135A)

Also Available in Remanufactured

$620.78

DS-TY6684

ALTERNATOR (12V, 120A)

Also Available in Remanufactured

$451.15

DS-TY6751

ALTERNATOR - 15SI (12V, 105A)

Also Available in Remanufactured

$384.41

DS-TY6753

ALTERNATOR - 21SI (12V, 130A, INTERNAL REGULATOR, EXTERNAL FAN)

Also Available in Remanufactured

$345.11

DS-TY6773

ALTERNATOR - N1 (12V, 135A)

Also Available in Remanufactured

$620.78

DS-TY6795

ALTERNATOR - N1 (12V, 135A)

Also Available in Remanufactured

$620.78

888.687.0539 (U.S.)|225.706.4858 (Int.)

Monday-Friday 7am-5pm CST
8784 S. Choctaw Dr. Baton Rouge, LA 70815
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Caterpillar® and all of the Caterpillar® engine models listed on this website are registered trademarks of Caterpillar, Inc. Cummins® and all of the Cummins® engine models listed on this website are registered trademarks of Cummins. Detroit Diesel® and all of the Detroit Diesel® engine models listed on this website are registered trademarks of Daimler AG. John Deere® and all of the John Deere® engine models listed on this website are registered trademarks of John Deere. Allison Transmission® and all of their transmission models listed on this website are registered trademarks of Allison Transmission®. Diesel Parts Direct is not an authorized dealer for Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission. None of the parts beginning with "DS" or "R" are genuine Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission items.

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