Remy
Premium Remanufactured

Remy 12243 Alternator

Brand Remy 12243
Amperage Rating 81
Fan Type Internal
New or Remanufactured Remanufactured
OE Manufacturer Nippondenso
Pulley Included Yes
Rotation Direction Clockwise
Voltage (V) 12
Voltage Regulator Type External
Product line Premium Remanufactured
Fits Jeep · 2 vehicles

Premium remanufactured. OE manufacturer pedigree for dependable charging performance.

Remanufactured alternator. A direct replacement for restoring charging system output.

External regulator. Built with an external voltage regulator for precise control.

Cross-references 121000-3730 and 56041565AA for the same application. See all 2.

$201.47Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $201.47
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

Remanufactured Alternator for Jeep TJ and Wrangler

Remy Part Number 12243 is a premium remanufactured alternator built for 2000 Jeep TJ and 2000 Jeep Wrangler applications. It delivers 81 amps at 12 volts and uses an external voltage regulator, making it a direct-fit electrical charging replacement for the listed vehicles.

Key Features

  • 81 amp amperage rating for standard charging-system applications
  • 12-volt alternator with clockwise rotation
  • Internal fan design for charging-system cooling
  • Includes pulley
  • Remanufactured to Remy Premium Remanufactured standards
  • OE manufacturer reference: Nippondenso

Product Details

Remy 12243 is a remanufactured alternator for Jeep TJ and Jeep Wrangler models from 2000. It is built around the original Nippondenso design and configured with an external voltage regulator, clockwise rotation, and an internal fan. This alternator is intended for standard charging-system service where the vehicle needs stable electrical output for battery charging and accessory operation. If you are searching for a 2000 Jeep Wrangler alternator or a 2000 Jeep TJ alternator, Remy 12243 matches the listed fitment and electrical specifications.

This part cross-references 121000-3730 and 56041565AA for the same application.

What It Helps Solve

  • Low battery charging output
  • Charging warning light concerns
  • Dim lights caused by weak alternator output
  • Electrical system voltage instability
  • Alternator noise or wear-related charging failure

Installation Notes and Tips

Verify pulley alignment, belt condition, and electrical connector compatibility before installation. Confirm that the vehicle uses an external voltage regulator and standard charging configuration. After installation, check charging voltage at the battery and inspect the belt drive for proper tension and tracking.

Quality Assurance

Remy Premium Remanufactured parts are remanufactured to restore core functionality for charging-system service. This alternator is built to the listed OE-style application and specifications for the confirmed Jeep TJ and Jeep Wrangler fitment.

This part fits 2 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2000JeepTJ4.0LL6N/AStd; 81 Amps; Premium Remanufactured
2000JeepWrangler4.0LL6N/AStd; 81 Amps; Premium Remanufactured
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
121000-373056041565AA