Aftermarket Mitsubishi Voltage Regulator IM850
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Aftermarket Mitsubishi Voltage Regulator IM850

Mitsubishi
IM850
In stock
Voltage Regulator
$55.00

Aftermarket Mitsubishi Voltage Regulator IM850

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In-stock orders ship out same day or next business day via USPS.

Pre Order

Pre-orders ship out in the order received within 7–21 business days.

Customer Support

Need help finding a part? Contact Support@RCAutoElectric.com

Specifications

  • MFR: MITSUBISHI
  • DIM 1: 24mm ID Slip Ring Cover
  • FEATURE 1: 100% New
  • FEATURE 2: Trio activated
  • NOTE 1: For stator-activated version use IM853.
  • SPECS FOR: Mitsubishi IR/IF Alternators
  • SPECS: 12 Volt, A-Circuit, IG-C-L-FR Terminals, 14.5 Vset

Used On

  • Acura (1997-2001)
  • Honda (1996-1998)

Replaces

Honda: 31150-P2E-A01
Original Reference Number: 3177203J

Lester Numbers

13649, 13762

Unit Numbers

Acura: 31100-P73-A01, 31100-P73-A01RM, AHGA33
Honda: 06311-PEJ-505RM, 31100-P2E-A01, 31100-P2E-A01RM, 31100-P2E-A02, 31100-P2E-A02RM, 31100-P73-A0101, AHGA24, AHGA25
Mitsubishi: A005TA0991, A005TA0991ZC, A005TA0992, A005TA3591

Vehicle Application

Acura Car
Integra L4 1.8L 1797cc B18C5 1997-1998
Integra L4 1.8L 1797cc B18C5 2000-2001

Honda Car
Civic L4 1.6L 1588cc 98cid 1996-1998
Civic L4 1.6L 1590cc 1996-1998
Civic del Sol L4 1.6L 1588cc 98cid D16Y7, D16Y8 1996-1997

Honda - Europe Car
Civic 1500, D15Z8 1996-2001

Features & Benefits

  • Precision aftermarket replacement part
  • Regulates alternator output voltage
  • Helps maintain proper battery charging
  • Supports stable charging system performance
  • Manufactured to match original specifications
  • Designed for dependable long-term operation
  • Ideal for alternator rebuilding and repair
  • Cross-referenced to OEM and aftermarket part numbers

What Does a Voltage Regulator Do?

The voltage regulator controls the alternator's output by regulating current supplied to the rotor field winding. As electrical demand changes, the regulator continuously adjusts field current to maintain the proper charging voltage for the battery and the vehicle's electrical system.

A properly functioning voltage regulator helps prevent battery overcharging and undercharging while protecting sensitive electrical components from excessive voltage. Because charging system performance depends on the interaction between the regulator, rotor, stator, rectifier, and battery, replacing a faulty regulator is an important step in restoring alternator performance.

Common Signs Replacement Is Needed

Replace the voltage regulator if you notice:

  • Battery overcharging
  • Battery not charging
  • Low charging voltage
  • High charging voltage
  • Battery warning light illuminated
  • Intermittent charging problems
  • Headlights that brighten or dim with engine speed
  • Charging system failure during testing
  • Voltage regulator failure discovered during alternator rebuilding

Installation Recommendations

Installation should be performed by a qualified technician or experienced alternator rebuilder. Before installing the new regulator, inspect the brushes, brush holder, slip rings, rotor, stator, rectifier, wiring, and electrical connections for signs of wear or damage.

Always verify connector configuration and mounting style before installation. After assembly, bench-test the alternator to confirm proper charging voltage and overall charging system performance.

While You're Rebuilding

Inspect other common wear components to help maximize charging system reliability:

Why Buy From RC Auto Electric?

RC Auto Electric specializes in alternator and starter rebuilding components for professional rebuilders, repair shops, automotive technicians, and DIY enthusiasts. Our extensive catalog includes thousands of OEM and aftermarket electrical components backed by accurate cross-reference information to help simplify part identification and reduce ordering mistakes.

Disclaimer

Compatibility information is provided as a reference only. Manufacturing revisions, production changes, and previous rebuilding modifications may affect internal alternator components. Always compare the original part, connector configuration, mounting style, voltage specifications, cross-reference numbers, and product photographs before installation. If you are unsure about compatibility, contact RC Auto Electric before ordering.

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