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.