Description
Vehicle Compatibility & Applications
This Bosch 12V 14mm alternator voltage regulator with resistive circuit is designed for a wide range of passenger, light commercial and utility vehicles using Bosch alternators. It is commonly found on many Mercedes-Benz models, Volkswagen Golf / Jetta / Polo, Citroen, Peugeot, Saab and SsangYong applications listed below.
- Citroen: selected models using Bosch alternator (14mm slip ring)
- Mercedes-Benz: 124 Series; 124 Series T-Modell; C-Class; 190E 1.8L / 2.0L / 2.3L / 2.6L; 200CE Cabrio / Coupé; 200E; 200TE 124 Series T-Modell; 210; 220CE Cabrio / Coupé; 220E 124 Series; 220TE 124 Series T-Modell; 230CE Coupé; 230E / 230TE; 280E / 280TE 124 Series T-Modell; 300TE 4Matic 124 Series T-Modell; 300E 24 124 Series; 300SEL 3.2L; 308D Sprinter; 308D Sprinter James Cook; 310; 312D / 314 Sprinter; 320CE; 320E 124 Series; 320TE 124 Series T-Modell; 410D / 412D Sprinter; C180 16V / Estate / T-Modell; C200 16V / Diesel / T-Modell; C220 16V / Diesel; C230 T-Modell; C250 Diesel; C280 24V; C300 Diesel; C36 / C43 AMG; CLK200 Cabrio / Coupé; CLK430 Cabrio / Coupé; CLK55 AMG Coupé; E180; E200 Cabrio / Coupé / E-Klasse / T-Modell; E200T E-Klasse; E220 Cabrio / Coupé / E-Klasse; E220T E-Klasse; E230 T-Modell; E250 Diesel T; E280 / E280T E-Klasse; E300 4Matic E-Klasse; E300 Diesel T 4Matic; E300T 4Matic E-Klasse; E320 Coupé / E-Klasse / T-Modell; E320T E-Klasse T-Modell; E36 AMG Cabrio / Coupé E-Klasse; E430; E55 AMG; G300DT; MB100; ML230 / ML320 / ML430 / ML500 / ML55 AMG (M-Class); S280 / S320 / S55 AMG; SL320 / SL500 / SLK200; Sprinter 2.3L / 2.9L Diesel; Sprinter 208 CDI / 208D 2.3L; Sprinter 210 / 212 Diesel; Sprinter 211 / 213 / 216 / 308 CDI; Sprinter 308D 2.3L; Sprinter 310 / 312 Diesel; Sprinter 313 / 316 / 408 CDI; Sprinter 408D 2.3L; Sprinter 410 / 412 Diesel; Sprinter 411 / 413 / 416 CDI; Unimog; V200 / V230; Vario; Vito 2.0L / 2.3L; 200CE models
- Peugeot: selected models using Bosch alternator (OE 5761.85 / 5761.86)
- Saab: applications using Bosch alternator matched to this regulator
- SsangYong: Istana 2.3L 16V / Diesel; Istana 2.9L; Korando 2.3L Diesel; Musso 2.3L / 2.9L Diesel; Musso 3.2L 24 Valve
- Volkswagen: Golf, Jetta, Polo and other VW applications with 14mm Bosch alternator
Use REG1004 where the alternator is a Bosch unit with 14mm slip ring and resistive circuit, and the OE numbers and plug arrangement match the original regulator.
Specifications
- Reference: REG1004
- Part type: Alternator voltage regulator (with resistive circuit)
- System voltage: 12V (VS = 14.5V)
- Manufacturer type: Bosch
- Circuit regulator: A-circuit
- Type: IR / IF (internal regulator, internal fan)
- Slip ring size: 14mm
- Design note: With resistive circuit, suitable for many Golf / Jetta / Polo style applications
- Primary usage: Citroen, Mercedes-Benz, Peugeot, Saab, SsangYong, Volkswagen
- Function: Controls alternator output voltage and excitation current
- Mercedes-Benz OE numbers: 002-154-81-06; 002-154-82-06; 002-154-85-06; 002-154-87-06; 002-154-92-06; 002-215-91-06; 003-154-06-06
- Peugeot OE numbers: 5761.85; 5761.86
Features
- Bosch 12V alternator voltage regulator for 14mm slip ring applications
- Internal regulator with internal fan design matched to Bosch alternators
- Resistive circuit version commonly used on Mercedes-Benz and VW Golf / Jetta / Polo
- Wide OE cross reference for Citroen, Peugeot, Saab, SsangYong and VW
- Direct replacement layout to simplify alternator repair and reconditioning
Why Buy From Us
- Local stock on popular Bosch regulators like REG1004 for European vehicles
- Standard 12 month warranty under normal operating and installation conditions
- Fitment assistance using OE numbers, alternator labels and photos
- Secure online ordering with fast courier delivery nationwide
- Trusted by workshops and auto electricians for reliable charging system parts
Installation & Maintenance Tips
- Disconnect the vehicle battery before removing or installing the alternator or regulator.
- Confirm that your alternator is a Bosch unit with 14mm slip ring and matching OE number before fitting REG1004.
- Inspect slip rings and brushes for wear, pitting or burning and repair as necessary.
- Ensure all main power and earth connections are clean and tight to avoid voltage drop and charging faults.
- After installation, test charging voltage at the battery with the engine running and accessories on to confirm correct regulation.
- If you are unsure of wiring or testing procedures, have the regulator fitted 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).