Description
Vehicle Compatibility & OE Cross Reference
Alternator voltage regulator for Nippon Denso alternators where the original regulator matches a B Circuit design with IR/IF internal regulator internal fan configuration and a 4 pin connector in the IG S L FR layout. Listed for Toyota, Lexus, and Honda applications where the same regulator and OE references apply. Confirm by regulator plug style and OE cross reference before ordering.
OE Numbers By Brand
- Toyota: 27700-20090; 2770020090; 27700-20100; 2770020100
Variant Reference
- Variant / Reference: REG6105CX
Specifications
- Reference: REG6105
- Variant / Reference: REG6105CX
- Part Type: Alternator Voltage Regulator
- Manufacturer: Nippon Denso
- System Voltage: 12V
- Regulated Voltage (Set Point): 14.1V (VS=14.1V)
- Circuit: B Circuit
- Type: IR/IF (Internal Regulator / Internal Fan)
- Connector / Pins: 4 Pin (IG S L FR)
- Specification: 6 Sec. LRC
- Lamp Function: Standard Lamp Function
- Output Function: No Output
- OE Numbers: 27700-20090; 2770020090; 27700-20100; 2770020100
Features
- Designed to regulate alternator field current for stable charging on compatible Nippon Denso alternators
- 4 pin IG S L FR connector format for the specified Toyota Lexus Honda regulator interface
- B circuit control strategy with IR/IF internal regulator internal fan configuration for matching alternator layouts
- 6 sec LRC characteristic with standard lamp function and no output specification where required
- OE cross references provided to support accurate matching before fitment
Why Buy From Us
- Local South African stock with nationwide courier delivery
- 12-month warranty subject to correct application and installation
- Fitment support using alternator labels, plug photos and OE number matching
- Trusted by workshops and fleet operators for dependable charging system components
Trusted by thousands of South African drivers for quality and durability.
Installation & Maintenance Tips
- Disconnect the battery before alternator removal or regulator replacement
- Match the regulator by Nippon Denso manufacturer, B circuit design, and the 4 pin IG S L FR plug layout
- Cross check the Toyota OE numbers listed to confirm the correct regulator family before fitting
- Inspect brushes and slip rings while the alternator is open and replace worn components where required
- Ensure battery terminals and earth connections are clean and tight to prevent voltage drop and repeat failures
- After installation, verify charging voltage at idle and under load to confirm stable regulation
Important: Product information, kit contents and compatibility are provided as a guide and may contain errors or omissions. Please verify that this part and any included components are correct for your vehicle before installation. For full details see our Website Disclaimer (Errors & Omissions).