Vehicle Compatibility
Alternator voltage regulator for Bosch alternators where the original regulator matches an A Circuit design with IR/IF internal regulator internal fan configuration and a 2 pin connector in the L-DFM or L-FR layout. Use the vehicle list as a guide, but confirm by alternator label and regulator plug style before ordering.
- Audi: A3 1.8T; A3 1.9 TDI Quattro; S3 1.8 Quattro; TT 1.8T Coupe Quattro; TT 1.8T Roadster Quattro; TT 3.2 Coupe Quattro; TT 3.2 Roadster Quattro; Audi Various
- Ford: Galaxy
- Seat / Skoda: Applications using a matching Bosch 2 pin L-DFM or L-FR regulator
- Volkswagen: Beetle 1.9 TDI; Bora; Golf 1.9 SDI TDI; Golf 2.3 V5 VR5; Golf 2.8 V6; Golf IV 1.6 Variant; Golf IV 1.8T; Golf IV 1.9 SDI TDI Variant; Golf IV 2.0 2.3; Polo 1.9 SDI TDI; Polo Classic 1.9 SDI TDI; Polo Coupe 1.9 TDI; Sharan 1.8T; Sharan 1.9 TDI; Sharan 2.8 4 Motion; Transporter T5 1.9 TDI; Transporter T5 3.2; California T5 1.9 TDI; California T5 3.2; Caravelle T5 1.9 TDI; Caravelle T5 3.2; Multivan T5 1.9 TDI; Multivan T5 3.2; CrossPolo 1.9 TDI; New Beetle 1.8T; New Beetle 2.0 Cabriolet
Specifications
- Reference: REG1104
- Catalogue Reference: REG1072
- Part Type: Alternator Voltage Regulator
- Manufacturer: Bosch
- System Voltage: 12V
- Regulated Voltage (Set Point): 14.5V (VS=14.5V)
- Amps (Alternator Output Range Listed): 65A, 70A, 75A, 90A, 110A, 120A, 140A, 150A, 180A
- Circuit: A Circuit
- Type: IR/IF (Internal Regulator / Internal Fan)
- Connector / Pins: 2 Pin L-DFM / 2 Pin L-FR
Features
- Designed to stabilise charging output by regulating field current on compatible Bosch alternators
- 2 pin L-DFM or L-FR connection format to match the specified regulator interface
- A Circuit control strategy and IR/IF internal regulator internal fan design for matching alternator layouts
- Useful for alternator overhaul work where the original regulator matches the same plug and control type
Why Order From Us
- Local South African stock with nationwide courier delivery
- 12-month warranty subject to correct application and installation
- Fitment support using alternator labels, regulator markings and plug photos
- Trusted by workshops and DIY customers for reliable 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 Bosch manufacturer, A Circuit design, and the 2 pin L-DFM or L-FR plug layout
- 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 and confirm warning lamp behaviour
- If you are unsure about alternator repairs, have the regulator fitted and tested by a qualified auto electrician
