Kohler 25 403 45-S

Kohler OEM 12/15 Amp Voltage Regulator / Rectifier 25 403 45-S

Restore proper charging system performance with the Genuine Kohler OEM 25 403 45-S Voltage Regulator / Rectifier. Used across a wide range of Kohler engines, this 12/15-amp regulator helps control charging system output to keep the battery properly charged and protect electrical components from improper charging voltage.

This regulator is used on select Kohler Command, Command PRO, Courage, and other Kohler engine applications. Exact fitment varies by engine model and specification number.

What's Included:

• (1) Genuine Kohler OEM Voltage Regulator / Rectifier — 25 403 45-S

Common Signs of a Failing Voltage Regulator:

• Battery drains or won't stay charged
• Weak starting or failure to restart
• Charging voltage is too high or too low
• Electrical problems when the PTO, lights, or other accessories are used
• Burnt, melted, or overheated wiring and connectors

Important Charging System Note:

Kohler engines may use different charging systems even within the same engine family. Some lower-amperage systems use a diode in the stator charging circuit and do not use a separate external regulator. Higher-amperage regulated systems use an external voltage regulator/rectifier such as this one.

Always verify your complete engine model and specification number before ordering.

Product Details:

• Genuine Kohler Original Equipment (OEM)
• Part Number: 25 403 45-S
• Part Type: Voltage Regulator / Rectifier
• Charging System: 12/15 Amp
• Regulates charging system output
• Helps maintain proper battery charging voltage
• Fits select Kohler single-cylinder and V-Twin engines
• Exact application varies by engine specification