Aftermarket Denso Voltage Regulator IN439

• Denso 126000-1580, 126000-1640, 126000-1660, 126000-1670, 126000-2820, GM 94854171, 94857219, Toyota 27700-35040, 27700-46050, 27700-74030, 27700-74040, 27700-78700-71

Vehicle Application

Caterpillar Ag. & Ind. Excavator
304E Mini Excavator C2.4 146ci, 2.4L Caterpillar 2012-2014
305.5E Mini Excavator C2.4 146ci, 2.4L Caterpillar 2012-2014
305E Mini Excavator C2.4 146ci, 2.4L Caterpillar 2012-2014

Toyota Forklift
7FG10 5K Engine 1998-2001
7FG14 5K Engine 1998-2001
7FG15 4Y Engine 1998-2001
7FG15 5K Engine 1998-2001
7FG18 4Y Engine 1998-2001
7FG18 5K Engine 1998-2001
7FG20 4Y Engine 1998-2001
7FG20 5K Engine 1998-2001
7FG23 4Y Engine 1998-2001
7FG23 5K Engine 1998-2001
7FG25 4Y Engine 1998-2001
7FG25 5K Engine 1998-2001
7FG28 4Y Engine 1998-2001
7FG30 4Y Engine 1998-2001
7FGJ35 4Y Engine 1998-2001
7FGK20 4Y Engine 1993-2001
7FGK20 5K Engine 1993-2001
7FGK23 5K Engine 1998-2001
7FGK25 4Y Engine 1993-2001
7FGK25 5K Engine 1993-2001
7FGK30 4Y Engine 1993-2001
7FGK30 5K Engine 1993-2001

Toyota Car
Paseo L4 1.5L 1497cc 1994-1995
Celica L4 1.8L 1762cc 107cid 1994-1997
Corolla L4 1.6L 1587cc 1993-1997
Corolla L4 1.8L 1762cc 107cid 1993-1997
Camry V6 3.0L 2959cc 1993
Camry L4 2.2L 2164cc 1993-1996
MR2 L4 2.0L 1998cc 122cid 1993
MR2 L4 2.0L 1998cc 122cid 1993-1995
MR2 L4 2.2L 2164cc 1993-1995
Celica L4 2.2L 2164cc 1994-1999
Supra L6 3.0L 2997cc w/Twin Turbo 1993-1998
Tercel L4 1.5L 1497cc 1998-1999
Camry L4 2.2L 2164cc 1997-2001
Camry V6 3.0L 2959cc 1992
Solara L4 2.2L 2164cc 1999-2001

Geo Car
Prizm L4 1.6L 1588cc 98cid 1993-1997
Prizm L4 1.8L 1762cc 107cid 1993-1997

Toyota Truck
4Runner L4 2.4L 2366cc 1993-1995
Pickup L4 2.4L 2366cc 1993-1995
4Runner V6 3.0L 2959cc 1993-1995
Pickup V6 3.0L 2959cc 1993-1995
T100 V6 3.0L 2959cc 1993-1994
RAV4 L4 2.0L 1998cc 122cid 1996-2000

Lexus Car
ES300 V6 3.0L 2959cc 1993
LS400 V8 4.0L 3969cc 1993-1994
SC400 V8 4.0L 3969cc 1995-1997

Toyota - Europe Car
Camry 2200 1992-2001
Carina E 2000 1992-1997
Picnic 2000, 3S-FE 1997-2001
MR2 2000 1992-1999
Previa 2400, TCR, 2TZ-FE 1993-2000
Carina E 2000 1992-1996
Corolla (E11) 2000, 2CE 1998-2000
Corolla (E10) 2000, 2C 1992-1997

Toyota - Europe Truck
Rav 4 Mk1 2000, 3S-FE 1994-2000

Toyota Van
Previa L4 2.4L 2438cc 1993
Previa L4 2.4L 2438cc wo/Supercharger 1994-1995

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:

• Bearings

• Brushes

• Brush Holder

• Slip Rings

• Rectifier

• Diodes

• Rotor

• Clutch Pulley

• Insulators

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.