Description
Vehicle Compatibility
Complete alternator rectifier for NCB1 alternator applications where the alternator uses a matching 120mm outer diameter rectifier plate and the same diode configuration. Listed for VW and Audi alternator builds using VAG reference 038903359, and also referenced for certain Mercedes applications where the alternator/rectifier specification matches. Specified with 6 avalanche diodes and a 50A rating for compatible alternator rebuild work. Confirm by alternator label, rectifier OD and OE reference before ordering.
- VAG (VW / Audi): Applications matching VAG 038903359
- Mercedes-Benz: Alternator applications where NCB1 rectifier specification matches
Specifications
- Reference: RCT1069
- Part Type: Alternator Rectifier
- Type: NCB1
- System Voltage: 12V
- Outer Diameter: 120mm
- Current Strength From: 50A
- Number Of Diodes: 6
- Diode Type: Avalanche Diode
- OE / Reference: F00M133246
- Replaces: FOOM12
OE Numbers
- VAG: 038903359
- Bosch Reference: F00M133246
Features
- 120mm NCB1 rectifier plate designed for matched alternator housings using a 6 diode layout
- 50A avalanche diode configuration for stable rectification and improved resilience under load
- Common VW and Audi coverage where VAG 038903359 reference matches
- Supports alternator overhaul where failed diodes cause low charge, battery drain, or excessive AC ripple
- Best practice is to confirm rectifier diameter and Bosch reference F00M133246 before installation
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 rectifier and terminal 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 rectifier replacement
- Confirm rectifier outer diameter (120mm) and diode layout (6 diodes) before fitting
- Inspect stator windings, solder joints and insulation while the alternator is open
- Replace worn brushes and check slip rings during the rebuild to prevent repeat failures
- After installation, verify charging voltage under load and test for abnormal AC ripple
- If you are unsure about alternator repairs, have the unit 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).