Alternator Voltage Regulator 12V Bosch 3 Pin IG L FR A Circuit IR IF BMW Alpina Volkswagen REG1102
Alternator Voltage Regulator 12V Bosch 3 Pin IG L FR A Circuit IR IF BMW Alpina Volkswagen REG1102
Vehicle Compatibility
Alternator voltage regulator for select Bosch alternator applications on BMW and Alpina vehicles where the alternator uses a matching regulator specification and plug layout. Supplied as a 3 pin IG L FR configuration (plug type IDIG-L-CPU) on compatible alternators, with A-circuit control strategy and IR/IF (internal regulator / internal fan) design. Includes active lamp function and 12 sec LRC behaviour with the same charging characteristics. Also cross-referenced to VAG 038903803C where the alternator/regulator match. Confirm by alternator label, plug style and OE reference before ordering.
- BMW: 316i; 318i; 320Ci Coupe; 320i Touring; 323Ci Cabrio/Coupe; 323i Touring; 328Ci Coupe; 328i Touring; 520i Touring; 523i Touring; 528i Touring
- BMW Z3: 2.0L; 2.5L; 2.8L Coupe
- Alpina: Applications using matching Bosch alternator regulator specification
- Volkswagen: Applications using matching VAG reference 038903803C
Specifications
- Reference: REG1102
- Part Type: Alternator Voltage Regulator
- Manufacturer: Bosch
- System Voltage: 12V
- Regulated Voltage (Set Point): 14.4V (VS=14.4V)
- Charging Voltage: 14.5V
- Operating Voltage: 14V
- Circuit: A-Circuit
- Type: IR/IF (Internal Regulator / Internal Fan)
- Connector / Pins: 3 Pin (IG-L-FR)
- Plug Type: IDIG-L-CPU
- Specification: 12 Sec. LRC; Active Lamp
- Alternator Output Range: 80A; 90A; 120A; 140A; 150A
OE Numbers
- BMW: 12311432964
- BMW: 12311702927
- BMW: 12311713491
- VAG: 038903803C
Features
- Bosch regulator design for matched BMW and Alpina alternator configurations using a 3 pin IG-L-FR interface
- A-circuit control strategy with IR/IF internal regulator internal fan configuration for specified alternator housings
- 14.4V set point (VS=14.4V) with 14.5V charge control for stable 12V system charging
- 12 second LRC behaviour with active lamp function for correct warning lamp and load response behaviour
- Suitable replacement option across multiple alternator output ratings where the OE/cross reference matches
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 and clear photos of the existing regulator and plug layout
- 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 voltage regulator replacement
- Confirm the plug type and pin layout matches 3 pin IG-L-FR (IDIG-L-CPU) before fitting
- Inspect brushes, slip rings and internal connections while the alternator is open and replace worn parts as required
- Ensure charging circuit connections and earth points are clean and tight to prevent voltage drop and repeat failures
- After installation, verify charging voltage under load and confirm warning lamp behaviour is correct
- If you are unsure about alternator repairs, have the unit fitted and tested by a qualified auto electrician
Original: $29.39
-70%$29.39
$8.82Product Information
Product Information
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Description
Vehicle Compatibility
Alternator voltage regulator for select Bosch alternator applications on BMW and Alpina vehicles where the alternator uses a matching regulator specification and plug layout. Supplied as a 3 pin IG L FR configuration (plug type IDIG-L-CPU) on compatible alternators, with A-circuit control strategy and IR/IF (internal regulator / internal fan) design. Includes active lamp function and 12 sec LRC behaviour with the same charging characteristics. Also cross-referenced to VAG 038903803C where the alternator/regulator match. Confirm by alternator label, plug style and OE reference before ordering.
- BMW: 316i; 318i; 320Ci Coupe; 320i Touring; 323Ci Cabrio/Coupe; 323i Touring; 328Ci Coupe; 328i Touring; 520i Touring; 523i Touring; 528i Touring
- BMW Z3: 2.0L; 2.5L; 2.8L Coupe
- Alpina: Applications using matching Bosch alternator regulator specification
- Volkswagen: Applications using matching VAG reference 038903803C
Specifications
- Reference: REG1102
- Part Type: Alternator Voltage Regulator
- Manufacturer: Bosch
- System Voltage: 12V
- Regulated Voltage (Set Point): 14.4V (VS=14.4V)
- Charging Voltage: 14.5V
- Operating Voltage: 14V
- Circuit: A-Circuit
- Type: IR/IF (Internal Regulator / Internal Fan)
- Connector / Pins: 3 Pin (IG-L-FR)
- Plug Type: IDIG-L-CPU
- Specification: 12 Sec. LRC; Active Lamp
- Alternator Output Range: 80A; 90A; 120A; 140A; 150A
OE Numbers
- BMW: 12311432964
- BMW: 12311702927
- BMW: 12311713491
- VAG: 038903803C
Features
- Bosch regulator design for matched BMW and Alpina alternator configurations using a 3 pin IG-L-FR interface
- A-circuit control strategy with IR/IF internal regulator internal fan configuration for specified alternator housings
- 14.4V set point (VS=14.4V) with 14.5V charge control for stable 12V system charging
- 12 second LRC behaviour with active lamp function for correct warning lamp and load response behaviour
- Suitable replacement option across multiple alternator output ratings where the OE/cross reference matches
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 and clear photos of the existing regulator and plug layout
- 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 voltage regulator replacement
- Confirm the plug type and pin layout matches 3 pin IG-L-FR (IDIG-L-CPU) before fitting
- Inspect brushes, slip rings and internal connections while the alternator is open and replace worn parts as required
- Ensure charging circuit connections and earth points are clean and tight to prevent voltage drop and repeat failures
- After installation, verify charging voltage under load and confirm warning lamp behaviour is correct
- If you are unsure about alternator repairs, have the unit fitted and tested by a qualified auto electrician
