MPA Electrical 140-39122 Alternator
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MPA Electrical 140-39122 Alternator

Brand MPA Electrical 140-39122
Product line New
Fits Isuzu · 15 vehicles

New replacement. MPA Electrical alternator for listed charging system service applications.

12V, 80A output. Built for the specified electrical load and charging requirements.

Internal regulator. Configured for applications using an internal regulator and external fan.

$273.02Free shipping
In stock · usually ships same day before 1pm CST
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Step 2 — Quantity
Order total $273.02
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Alternator for Isuzu NPR and NPR-HD

MPA Electrical alternator part number 140-39122 is a new charging system replacement for select Isuzu commercial trucks. It is built for 12V, 80A applications and is listed for vehicles with an internal regulator and external fan configuration.

Key Features

  • New alternator assembly for charging system service
  • 12V, 80A output specification
  • Internal regulator and external fan configuration
  • Listed for applications with a high vacuum pump not supplied
  • Compatible with select Isuzu NPR and NPR-HD trucks

Detailed Description

This MPA Electrical alternator, part number 140-39122, is a direct replacement style unit for select Isuzu NPR and Isuzu NPR-HD models. It is specified for 12-volt, 80-amp operation and is cataloged for applications using an internal regulator and external fan. The fitment notes also identify high vacuum pump applications where the pump is not supplied, so confirming the original unit and vehicle configuration is important before ordering. For buyers searching for an Isuzu NPR alternator or Isuzu NPR-HD alternator, 140-39122 provides a cataloged replacement option for the listed commercial truck applications.

What It Is Used For

  • Restoring battery charging output when the original alternator is weak or failed
  • Replacing a unit with unstable voltage output
  • Addressing charging warning lights caused by alternator wear
  • Replacing a damaged or non-functioning alternator on listed Isuzu trucks

Installation Notes and Tips

Verify the vehicle year, model, and alternator configuration against the fitment notes before installation. Confirm the 12V, 80A specification, internal regulator setup, and whether the application uses a high vacuum pump that is not supplied with this unit. Compare the original mounting and electrical connections to the replacement part number 140-39122 before final installation.

Quality Assurance

Brand Line: New indicates a new replacement part line from MPA Electrical. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Related reading

This part fits 15 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
2002IsuzuNPR5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
2002IsuzuNPR-HD5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
2001IsuzuNPR5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
2001IsuzuNPR-HD5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
2000IsuzuNPR5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
2000IsuzuNPR-HD5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
1999IsuzuNPR5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
1999IsuzuNPR-HD5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
1998IsuzuNPR5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
1997IsuzuNPR5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
1996IsuzuNPR5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
1995IsuzuNPR5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
1994IsuzuNPR5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
1993IsuzuNPR5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New
1992IsuzuNPR5.7LV8ALT 12V 80A IR/EF VP HI VAC PUMP NOT SUPPLIED; New