Honda 100A Main Fuse Block 38218-SM4-003

Honda Main Fuse Block 100A (38218-SM4-003)

The Honda Main Fuse Block 100A is a critical electrical protection component found in many Honda and Acura vehicles. This main fuse sits between the battery and the vehicle’s primary electrical systems, protecting high-amperage circuits from overloads and preventing severe electrical damage. If you drive a 1994–2002 Honda Accord, 1997–2006 Honda CR-V, 2003–2011 Honda Element, 1995–1998 Honda Odyssey, 1994–2001 Honda Prelude, 2000–2009 Honda S2000 or models like the 1997–1999 Acura CL, 1994–2001 Acura Integra, 2002–2006 Acura RSX, 1995–1998 Acura TL, and 1992–1994 Acura Vigor, this 100A main fuse (part number 38218-SM4-003) is a direct fit replacement.

A blown main fuse can leave your vehicle completely powerless, making it one of the most important parts of your electrical system. Because the main fuse protects the ignition, charging system, and essential electronics, replacing it with a high-quality OEM component ensures long-term reliability and proper function. This genuine Honda 100-amp fuse restores factory-correct protection and maintains safe, stable voltage throughout your vehicle.

Common Signs of a Bad or Blown Main Fuse

• No power when turning the key
• No dash lights or interior electronics
• The car will not crank or start
• No power to the ECU or fuel pump
• Battery appears good, but the vehicle is completely dead

Why the Main Fuse Is Important

• Prevents high-amperage electrical overloads
• Protects wiring, ECU, alternator, and ignition components
• Ensures stable electrical flow to the vehicle’s core systems
• Avoids severe electrical damage or fire risk caused by shorts or surges

Key Features

• OEM Honda part number: 38218-SM4-003
• 100A protection for high-load circuits
• Direct replacement for factory main fuse block
• Compatible with a wide range of Honda and Acura models
• Restores factory-level safety and performance
• Built to OEM standards for durability and reliability
• Essential for resolving no-power or electrical failure symptoms

Whether you're restoring electrical reliability or troubleshooting a no-start condition, the Honda Main Fuse Block 100A is a must-have replacement part to keep your vehicle safe and functioning correctly. This OEM component ensures dependable protection and optimal electrical performance—just as Honda engineered it.