Honda 31610-Z5T-803ZA Control Box Assembly (EXP-Alert) (Power Red)

The Honda 31610-Z5T-803ZA Control Box Assembly (EXP-Alert) (Power Red) is a genuine OEM component designed for GX340 and GX390 horizontal shaft engines. As a direct Honda OEM replacement, this assembly is manufactured to the same specification as the original unit, ensuring seamless integration with your existing wiring and mounting points. Confirm your engine's serial number against the fitment table before ordering, as Honda periodically supersedes control components at serial-number breaks. This is the Power Red variant — verify that your machine carries the matching color before purchasing.

Key Features

• Genuine Honda OEM Assembly — sourced directly from Honda, this control box carries the correct alert logic, connector configuration, and housing geometry for the GX340 and GX390 engines it serves, with no adaptation required to replace the original unit
• EXP-Alert Protection System — this assembly houses Honda's oil-alert and engine-protection circuitry, shutting the engine down before damage can occur when oil pressure drops to a critical level
• Power Red Variant — the (Power Red) designation identifies a specific color and configuration variant; match this to the original control box on your engine before purchasing
• GX340 and GX390 Fitment — built specifically for Honda GX340 and GX390 horizontal shaft engines; check your serial number against the compatibility table to confirm the correct supersession for your unit

The Control Box Assembly is the central electronic module that manages the EXP-Alert engine-protection system on equipped GX340 and GX390 engines. It monitors key operating parameters — most critically engine oil level or pressure — and triggers an automatic shutdown before internal damage can occur if a fault is detected. When this assembly fails or develops a fault, the engine may shut down unexpectedly, fail to start, or lose its protective shutdown function entirely, leaving the engine vulnerable to run-dry damage. Replacing a failed unit with the correct genuine OEM assembly restores full protection and normal operation.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.