Part #: 7872403

MPA Electrical 7872403 Alternator

Remanufactured
⚙️ 8 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$118.25Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
📦Remanufactured
🚗Fitment: Pontiac, Buick, and Oldsmobile, Grand Am, Skylark, Somerset, and Calais
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Alternator for Buick, Oldsmobile, and Pontiac Vehicles

The MPA Electrical Remanufactured Alternator 7872403 is designed to provide consistent 12-volt electrical output for select Buick, Oldsmobile, and Pontiac models. Engineered to meet the demands of vehicles like the Calais, Grand Am, and Skylark, this alternator ensures proper charging and starting system performance.

  • 85 amps output for stable electrical supply
  • External fan for efficient cooling
  • 4 groove serpentine pulley compatible with factory belts
  • Internal voltage regulator for simplified installation
  • Clockwise rotation matching original equipment
  • 12 volts system compatibility
  • Delco manufacturer components for durability

About the MPA Electrical Remanufactured Product Line

The Remanufactured line from MPA Electrical offers alternators rebuilt to meet original equipment specifications. This process includes thorough inspection, replacement of worn parts, and testing to ensure reliable performance. The 7872403 alternator benefits from this remanufacturing process, providing a cost-effective alternative to new units while maintaining quality standards.

Detailed Alternator Features and Specifications

This alternator delivers 85 amps of current, suitable for the electrical demands of Buick Calais, Oldsmobile Cutlass, and Pontiac Grand Am models. It features an external fan design that helps dissipate heat during operation, extending the alternator's service life. The 4 groove serpentine pulley is designed to fit factory belt systems, ensuring proper alignment and tension. An internal voltage regulator simplifies installation by eliminating the need for an external regulator. The clockwise rotation matches the original equipment setup, ensuring compatibility and smooth operation.

Common Applications and Problem Resolution

  • Restores charging system functionality in Buick Calais, Oldsmobile, and Pontiac Skylark vehicles
  • Replaces alternators with insufficient amperage output
  • Solves issues related to battery drain or electrical system failures
  • Addresses overheating problems with external fan cooling
  • Resolves pulley alignment and belt compatibility concerns

Installation Notes and Tips

Ensure the alternator is installed with the correct belt type matching the 4 groove serpentine pulley. Verify clockwise rotation compatibility with the vehicle’s original alternator. Check electrical connections and ground points for secure attachment. It is recommended to test the charging system after installation to confirm proper voltage output and regulator function.

Quality Assurance and Warranty Information

MPA Electrical Remanufactured alternators undergo comprehensive testing to meet performance standards. The 7872403 alternator includes an internal voltage regulator and is built with Delco components to ensure durability. Warranty coverage details should be confirmed with the distributor or installer, as terms may vary.

BrandMPA Electrical
Part Number7872403
PositionRemanufactured
Amps85 Amps
Clock3:00
FanExternal
ManufacturerDelco
Pulley4 Groove Serpentine
RegulatorInternal
RotationClockwise
Volts12 Volts

This part fits 8 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1991PontiacGrand Am2.5LL4N/Aw/ AC, Standard, w/ 85 amp alt.; Remanufactured
1990PontiacGrand Am2.5LL4N/Aw/ AC, Standard, w/ 85 amp alt.; Remanufactured
1989PontiacGrand Am2.5LL4N/Aw/ AC, Standard, w/ 85 amp alt.; Remanufactured
1988PontiacGrand Am2.5LL4N/Aw/ AC, Standard, w/ 85 amp alt.; Remanufactured
1987BuickSkylark2.5LL4N/AFits vehicles without air conditioning.; Remanufactured
1987OldsmobileCalais2.5LL4N/AFits vehicles without air conditioning.; Remanufactured
1987PontiacGrand Am2.5LL4N/AFits vehicles without air conditioning.; Remanufactured
1986OldsmobileCalais2.5LL4N/AFits vehicles without air conditioning.; Remanufactured

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

10463003104971181101123191358847809-37872-3

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.