Description
Vehicle Compatibility & OE Cross Reference
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 1 pin L connection using an M5 post plus M5 bolt (D+) output. Fitment must be confirmed by matching the regulator layout, terminals and dimensions listed below.
Listed Applications
- Fiat: Palio 1.4L; Palio 1.5L MPI 8V; Palio 1.6L MPI 8V or SPI 8V; Siena 1.4L 8V; Siena 1.6L MPI 8V or SPI 8V; Strada 1.6L MPI 8V
- Mercedes-Benz: Mercedes-Benz applications using a matching Bosch A Circuit 1 pin L M5 regulator
- New Holland: 4630; 5030; 5630; 6630; 7630; 7830; 8030
- Opel: Astra 1.4L; 1.6L; 1.8L; 2.0L; 2.0L Turbo; Combo; Corsa 1.4L; 1.6L; 1.7L CDTI or DTI; 1.8L; Corsa Utility; Meriva 1.6L 16V Twinport; Meriva 1.8L 16V; Tigra 1.8L Twin Top; Vectra; Zafira 1.8L
- Vauxhall: Vauxhall applications using a matching Bosch A Circuit 1 pin L M5 regulator
OE Numbers By Brand
- Fiat: 9949575
- Mercedes-Benz: 003-154-15-06
- Opel: 1204289; 9117942; 9201135; 93176380
- Bosch Reference: F00M144142
Specifications
- Reference: REG1073
- Part Type: Alternator Voltage Regulator
- Manufacturer: Bosch
- System Voltage: 12V
- Regulated Voltage (Set Point): 14.5V (VS=14.5V)
- Charging Voltage: 14.5V
- Operating Voltage: 14V
- Circuit: A Circuit
- Type: IR/IF (Internal Regulator Internal Fan)
- Connector / Pins: 1 Pin L (M5 Post) plus M5 Bolt (D+)
- Plug Type: Not specified
- Specification: 8.5 Sec. LRC
- Active Lamp: Yes
- Mounting Points Diameter: 63.5mm
- Short Circuit Protection: Yes
- Cross Reference: Bosch F00M144142
Features
- Designed to stabilise charging output by regulating field current on compatible Bosch alternators
- 14.5V charging specification for matching 12V electrical systems
- 1 pin L connection with M5 post and M5 bolt D+ layout for the specified alternator configuration
- 63.5mm mounting points diameter to match the correct regulator footprint
- 8.5 sec LRC specification with active lamp function and short circuit protection
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, regulator markings and clear photos of terminals
- 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 1 pin L M5 post plus M5 bolt D+ layout
- Confirm the mounting footprint, including the 63.5mm mounting points diameter, matches the original regulator
- Inspect brushes, slip rings and rotor condition while the alternator is open and replace worn components as 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
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).