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Our offices are closed for Thanksgiving. Orders placed online will be processed on Monday 12/1/2025.

Our offices are closed for Thanksgiving. Orders placed online will be processed on Monday 12/1/2025.

Alternators for Detroit Diesel Engines

Diesel Parts Direct carries a great selection of remanufactured alternators for Detroit Diesel engines with the following specifications:

  • Voltage: 12V and 24V
  • Amperage: 60A to 270A
  • Fan: external
  • Regulator: internal

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.


REMANUFACTURED ALTERNATOR - 21SI (12V, 100A)

Additional refundable core charge: $40.00 (See Details)

$166.78

REMANUFACTURED ALTERNATOR - 21SI (24V, 70A)

Additional refundable core charge: $0.00 (See Details)

$214.20

REMANUFACTURED ALTERNATOR - 21SI (12V, 130A)

Additional refundable core charge: $0.00 (See Details)

$176.95

REMANUFACTURED ALTERNATOR - 50DN (24V, 270A)

Additional refundable core charge: $0.00 (See Details)

$1,418.27

REMANUFACTURED ALTERNATOR - 26SI (12V, 85A, INTERNAL REGULATOR, EXTERNAL FAN)

Additional refundable core charge: $0.00 (See Details)

$387.02

REMANUFACTURED ALTERNATOR - 21SI (12V, 145A)

Additional refundable core charge: $0.00 (See Details)

$181.29

REMANUFACTURED ALTERNATOR - 21SI (12V, 100A)

Additional refundable core charge: $0.00 (See Details)

$166.78

REMANUFACTURED ALTERNATOR - 21SI (12V, 130A)

Additional refundable core charge: $0.00 (See Details)

$187.49

REMANUFACTURED ALTERNATOR - 26SI (12V, 85A, INTERNAL REGULATOR, EXTERNAL FAN)

Additional refundable core charge: $0.00 (See Details)

$387.02

REMANUFACTURED ALTERNATOR - 26SI (24V, 75A, INTERNAL REGULATOR, EXTERNAL FAN)

Additional refundable core charge: $70.00 (See Details)

$406.25

REMANUFACTURED ALTERNATOR (12V, 105A)

Additional refundable core charge: $0.00 (See Details)

$276.48

REMANUFACTURED ALTERNATOR (12V, 105A)

Additional refundable core charge: $0.00 (See Details)

$276.48

REMANUFACTURED ALTERNATOR - 27SI (24V, 65A)

Additional refundable core charge: $0.00 (See Details)

$204.36

REMANUFACTURED ALTERNATOR - 33SI (12V, 110A, INTERNAL REGULATOR, EXTERNAL FAN)

Additional refundable core charge: $90.00 (See Details)

$290.90

REMANUFACTURED ALTERNATOR - 33SI (12V, 135A, INTERNAL REGULATOR, EXTERNAL FAN)

Additional refundable core charge: $90.00 (See Details)

$299.38

REMANUFACTURED ALTERNATOR - 34SI (12V, 110A, INTERNAL REGULATOR, EXTERNAL FAN)

Additional refundable core charge: $0.00 (See Details)

$341.46

REMANUFACTURED ALTERNATOR - 34SI (12V, 135A, INTERNAL REGULATOR, EXTERNAL FAN)

Additional refundable core charge: $80.00 (See Details)

$353.35

REMANUFACTURED ALTERNATOR - 22SI (12V, 145A)

Additional refundable core charge: $40.00 (See Details)

$220.34

REMANUFACTURED ALTERNATOR - 22SI (12V, 145A)

Additional refundable core charge: $40.00 (See Details)

$220.34

REMANUFACTURED ALTERNATOR - 22SI (12V, 145A)

Additional refundable core charge: $40.00 (See Details)

$175.51

REMANUFACTURED ALTERNATOR - 30SI (12V, 105A, INTERNAL REGULATOR, EXTERNAL FAN)

Additional refundable core charge: $70.00 (See Details)

$304.93

REMANUFACTURED ALTERNATOR - 30SI (12V, 105A, INTERNAL REGULATOR, EXTERNAL FAN)

Additional refundable core charge: $70.00 (See Details)

$396.63

REMANUFACTURED ALTERNATOR - 30SI (12V, 105A, INTERNAL REGULATOR, EXTERNAL FAN)

Additional refundable core charge: $70.00 (See Details)

$620.17

REMANUFACTURED ALTERNATOR - 30SI (12V, 105A, INTERNAL REGULATOR, EXTERNAL FAN)

Additional refundable core charge: $70.00 (See Details)

$304.93

REMANUFACTURED ALTERNATOR - 30SI (24V, 60A, INTERNAL REGULATOR, EXTERNAL FAN)

Additional refundable core charge: $70.00 (See Details)

$483.14

REMANUFACTURED ALTERNATOR - T1 (24V, 140A)

Additional refundable core charge: $130.00 (See Details)

$971.14