OEM Alternator Voltage Regulator IB5378, aftermarket replacement, starter parts, alternator parts, automotive electrical
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OEM Bosch Voltage Regulator IB5378

Bosch
IB5378OEM
In stock
Voltage Regulator
$100.00

OEM Bosch Voltage Regulator IB5378

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Pre-orders ship out in the order received within 7–21 business days.

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Specifications

  • MFR:BOSCH
  • FEATURE 1:100% New OEM
  • FEATURE 2:LIN (COM) Regulator
  • FEATURE 3:COM ID Code: 32
  • FEATURE 4:LIN or Stator Activated
  • FEATURE 5:LIN Regulator
  • FEATURE 6:With Field Short Circuit Protection
  • FEATURE 7:With Soft Start and LRC Function
  • NOTE 1:Companion Rectifier IBR257
  • NOTE 2:Terminal Identification: Lin
  • SPECS FOR:Bosch IR/IF Alternator
  • SPECS:12 Volt, B-Circuit, Volt Set range is from 10.6V to 16.0V

USED ON

  • Mercedes-Benz (2006-2009)

Replaces

  • Bosch F 00M 144 158, F 00M 145 310, F 00M 145 378, F 00M 145 852, F 00M 145 886, Mercedes-Benz 003 154 44 06, 003 154 62 06, 003-154-75-06, 004-154-01-06, A 003 154 44 06, A 003 154 62 06, A-003-154-75-06, A-004-154-01-06

LESTER NUMBERS

  • 11217

UNIT NUMBERS

  • Bosch 0 124 625 023, 0 124 625 208; Chrysler 68011841AA, 68011841AB; Mercedes-Benz 272 154 01 02 80, 272-154-01-02, A 272 154 01 02 80, A272-154-01-02

Vehicle Application

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

Mercedes - Europe Car
E280 3000 2005-2009
E350 3500 2004-2009

Mercedes-Benz Car
E350 V6 3.5L 3498cc 2006
R350 V6 3.5L 3498cc 2006

Mercedes-Benz Truck
ML350 V6 3.5L 3498cc 2006

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:


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.

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Frequently Asked Questions

How do I confirm compatibility? +
Compare part numbers, dimensions and photos with the original component.
Is this OEM or aftermarket? +
This listing is for an aftermarket replacement part.
What should I verify before ordering? +
Check all fitment and application details before purchase.
Is professional installation recommended? +
Professional installation is recommended.
Where can I find related parts? +
Browse related starter and alternator categories on RCAutoElectric.

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