3858879 Voltage Regulator | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta voltage regulator from the Alternator, Charging, Electric Motor and Electric Drives group, weighing 0.088 kg and listed for 35 applications on DPX series drives. It supersedes part number 3857067, which was catalogued earlier as a governor, so searches on the old name can be misleading.

🚤 Compatibility

• Engine Family: DPX

Full model list at the end of this description.

⚙️ Key Features

• 0.088 kg
• Supersedes 3857067, catalogued earlier as a governor
• 35 applications on the DPX series
• Alternator and charging group

🔌 Function

Holds alternator output at the correct charging voltage by controlling field current as engine speed and battery state change.

⚠️ Common Signs of Failure

• Batteries flat, or persistently under-charged after running
• Charge voltage too high, with batteries gassing or losing electrolyte
• Charge warning light staying on or flickering
• Lights and instruments brightening and dimming with engine speed
• Brush gear or regulator body heat-discoloured on strip-down

🛠️ Service Notes

• Check the belt, battery condition and all charging cable connections before condemning the regulator
• Measure charge voltage at the battery with the engine running to separate a regulator fault from a cabling fault
• The old number was listed as a governor, so cross-check by part number rather than by description

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3858879 → Supersedes 3857067

OEM / Related Numbers

• 3857067 earlier number superseded by this part

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta 7.4GiPEFS, 7.4GiPBYCCE, 7.4GiPLKDCE, 7.4GiPLKECE, 7.4GiPWTR, 7.4GSiPBYCCE, 7.4GSiPEFS, 7.4GSiPWTR, 5.7GSiPWTR, 5.7GSiPEFS, 5.7GSPEFS, 5.7GSPWTR, 5.0GiPEFS, 5.0GiPWTR, 5.0GLPEFS, 5.0GLPWTR, 4.3GIPEFS, 4.3GIPWTRCE, 4.3GiJWTR, 4.3GLPEFS, 4.3GLPWTR, 4.3GSPWTR, 4.3GSJWTR, 3.0GSMWTR, 3.0GSPEFS, 3.0GSPWTR, 8.2GSiPBYCCE, 8.2GSiPEFS, 8.2GSiPWTR
• Volvo Penta DPX385XBYDCE, DPX385XEFS, DPX385XLKE
• Volvo Penta DPX415XEFS, DPX415XLKE, DPX415XBYDCE