OEM Bosch Voltage Regulator IB6020

Specifications

• MFR: BOSCH
• FEATURE 1: 100% New OEM
• FEATURE 2: LIN (COM) Regulator
• FEATURE 3: COM ID Code: 48
• FEATURE 4: Lin or Stator Activated
• FEATURE 5: Soft Start and LRC function
• FEATURE 6: Field Short Circuit Protection
• FEATURE 7: No Secondary Voltage
• SPECS FOR: Bosch IR/IF Alternator
• SPECS: 12 Volt, B-Circuit, High Side Drive Regulator, 14.40 Vset

Used On

• Dodge (2007-2008)
• Freightliner (2007-2008)
• Mercedes-Benz (2007-2014)

Replaces

Bosch: F 00M 346 006, F 00M 346 020, F 00M 346 036, F 00M 346 048, F 00M 346 081, F 00M 349 831
Original Reference Number: WG1776028

Lester Numbers

11304, 11305, 11308, 11310, 11444, 11445, 20758

Unit Numbers

Bosch: 0 120 000 025, 0 121 813 001, 0 121 813 002, 0 121 813 003, 0 121 813 005, 0 121 813 006, 0 121 813 014, 0 121 813 020, 0 121 813 023, 0 121 813 101, 0 121 813 102, 0 121 813 103, 0 121 813 105, 0 121 813 106, 0 121 813 114, 0 121 813 120, 0 121 813 123
CE Niehoff: 4048
Chrysler: 68011843AA, 68011843AC, 68011843AD
Mercedes-Benz: 000-906-02-00, 013 154 99 02, 013-154-05-02, 013-154-06-02, 013-154-09-02, 013-154-55-02, 013-154-99-02, 014-154-13-02, 629-150-04-50, A 013 154 99 02, A000-906-02-00, A013-154-09-02, A0131540502, A0131540602, A0131545502, A014-154-13-02, A629-150-04-50
Original Reference Number: 68011 843AC

Vehicle Application

Mercedes-Benz Car
CL600 V12 5.5L 5513cc 336cid 2007-2014
CL63 AMG V8 6.3L 6208cc 2008-2010
CL65 AMG V12 6.0L 5980cc 365cid 2008-2014
S600 V12 5.5L 5513cc 336cid 2007-2013
S63 AMG V8 6.3L 6208cc 2008-2010
S65 AMG V12 6.0L 5980cc 365cid 2007-2013
CL550 V8 5.5L 5461cc 333cid 2007-2008
CL550 V8 5.5L 5461cc 333cid 2009-2010
S550 V8 5.5L 5461cc 333cid 2007-2010
S550 V8 5.5L 5461cc 333cid 2008-2011
S550 V8 5.5L 5461cc 333cid 2010-2011
S450 V8 4.7L 4663cc 285cid 2008
S450 V8 4.7L 4663cc 285cid 2010
S450 V8 4.7L 4663cc 285cid 2010-2011
E350 V6 3.0L 2987cc 2011-2013
R350 V6 3.0L 2987cc 2010-2013
S350 V6 3.0L 2987cc 2012-2013

Mercedes-Benz Truck
GL320 V6 3.0L 2987cc DIESEL 2007-2009
ML320 V6 3.0L 2987cc DIESEL; 642.940; Turbocharged 2007
GL350 V6 3.0L 2987cc 2010-2012
ML320 V6 3.0L 2987cc 2009
ML350 V6 3.0L 2987cc 2010-2011

Mercedes - Europe Car
S320 CDI 3.0L, 155kW 2005-2009
S320 CDI 3.0L, 173kW 2006-2009
GL420 CDI OM 629.912, 4.0L Dsl., 225kW, 306HP, 3996cc 2006-2009
GL450 CDI OM 629.912, 4.0L Dsl., 225kW, 306HP, 3996cc 2009-2016

Mercedes - Europe Truck
ML280 CDI 3.0L, 140kW 2005-2009
ML420 CDI OM 629.912, 4.0L Dsl., 225kW, 306HP, 3996cc 2006-2009
ML450 CDI OM 629.912, 4.0L Dsl., 225kW, 306HP, 3996cc 2009-2011

Dodge Van
Sprinter 2500 V6 3.5L 3498cc GAS; VIN 6; EG2 2007-2008
Sprinter 3500 V6 3.5L 3498cc GAS; VIN 6; EG2 2007-2008

Freightliner Van
Sprinter 2500 V6 3.5L 3498cc 2007-2008
Sprinter 3500 V6 3.5L 3498cc 2007-2008

Caterpillar Ag. & Ind. Track Tractor
D6K2 C6.6 Acert 6.6L, Cat. Dsl. 2013-2019
D6K2 C7 Cat. Dsl. 2013-2016
D6K2 LGP C6.6 Acert 6.6L, Cat. Dsl. 2011-2018
D6K2 XL C6.6 Acert 6.6L, Cat. Dsl. 2013-2016

Features & Benefits

• Genuine OEM replacement part
• Manufactured to original factory specifications
• Regulates alternator output voltage
• Helps maintain proper battery charging
• Supports stable charging system performance
• Original fit, function, and electrical characteristics
• Ideal for alternator rebuilding and repair
• Engineered for long-term reliability

What Does a Voltage Regulator Do?

The voltage regulator controls the alternator's output by regulating current supplied to the rotor field winding. As electrical demand changes, the regulator continuously adjusts field current to maintain the proper charging voltage for the battery and the vehicle's electrical system.

A properly functioning voltage regulator helps prevent battery overcharging and undercharging while protecting sensitive electrical components from excessive voltage. Because charging system performance depends on the interaction between the regulator, rotor, stator, rectifier, and battery, replacing a faulty regulator is an important step in restoring alternator performance.

Common Signs Replacement Is Needed

Replace the voltage regulator if you notice:

• Battery overcharging
• Battery not charging
• Low charging voltage
• High charging voltage
• Battery warning light illuminated
• Intermittent charging problems
• Headlights that brighten or dim with engine speed
• Charging system failure during testing
• Voltage regulator failure discovered during alternator rebuilding

Installation Recommendations

Installation should be performed by a qualified technician or experienced alternator rebuilder. Before installing the new regulator, inspect the brushes, brush holder, slip rings, rotor, stator, rectifier, wiring, and electrical connections for signs of wear or damage.

Always verify connector configuration and mounting style before installation. After assembly, bench-test the alternator to confirm proper charging voltage and overall charging system performance.

While You're Rebuilding

Inspect other common wear components to help maximize charging system reliability:

• Bearings
• Brushes
• Brush Holder
• Slip Rings
• Rectifier
• Diodes
• Rotor
• Clutch Pulley
• Insulators

Why Buy From RC Auto Electric?

RC Auto Electric specializes in genuine OEM and premium aftermarket alternator and starter rebuilding components for professional rebuilders, repair shops, automotive technicians, and DIY enthusiasts. Our extensive catalog includes thousands of electrical components backed by accurate cross-reference information to help simplify part identification and reduce ordering mistakes.

Disclaimer

Compatibility information is provided as a reference only. Manufacturing revisions, production changes, and previous rebuilding modifications may affect internal alternator components. Always compare the original OEM part number, connector configuration, mounting style, voltage specifications, cross-reference numbers, and product photographs before installation. If you are unsure about compatibility, contact RC Auto Electric before ordering.