Description
Vehicle Compatibility
Alternator voltage regulator for Valeo alternators used on select Mercedes-Benz and Land Rover applications where the original regulator matches a 1 pin L connection with an M5 post, B circuit control strategy, and IR/IF internal regulator internal fan configuration. Confirm by alternator brand and regulator connection style before ordering.
- Mercedes-Benz: A Class, A140, A160
- Land Rover: Discovery
Specifications
- Reference: REG0021
- Part Type: Alternator Voltage Regulator
- Alternator Brand: Valeo
- System Voltage: 12V
- Regulated Voltage Set Point: 14.6V (VS=14.6V)
- Charging Voltage: 14.6V
- Operating Voltage: 14V
- Type: IR/IF (Internal Regulator / Internal Fan)
- Circuit: B Circuit
- Connector / Pins: 1 Pin L (M5 Post)
- Specification: 2.5 Sec. LRC
- Active Lamp: Yes
- Short Circuit Protection: Yes
Features
- Regulates alternator field current to maintain stable charging output on compatible Valeo units
- 14.6V charging specification suited to matching 12V electrical systems
- 1 pin L M5 post connector format to match the correct regulator terminal style
- B circuit control strategy for correct alternator operation where specified
- Active lamp function and short circuit protection for supported applications
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, part numbers 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
- Confirm the alternator is Valeo and the regulator connection is 1 pin L with an M5 post and B circuit design
- Inspect brushes and slip rings while the alternator is open, replacing worn components as needed
- 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
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).