Honda Step Wagon RF1 2.0L DOHC Automatic Engine Control Unit ECU 37820-P3G-902 Genuine OEM
Honda Step Wagon RF1 2.0L DOHC Automatic Engine Control Unit ECU 37820-P3G-902 Genuine OEM
The Honda Engine Control Unit (ECU) 37820-P3G-902 is a genuine OEM engine management computer designed for the Honda Step Wagon RF1 equipped with the 2.0L B20B DOHC petrol engine and automatic transmission.
This ECU continuously manages vital engine operations including fuel injection, ignition timing, idle speed, air-fuel ratio, sensor communication, and emissions control. Designed by Honda to factory specifications, it delivers dependable performance, smooth engine operation, and excellent fuel efficiency.
The 37820-P3G-902 ECU is commonly fitted to Japanese Domestic Market (JDM) Honda Step Wagon RF1 models powered by the B20B engine with automatic transmission.
Product Specifications
| Specification | Details |
|---|---|
| Honda Part Number | 37820-P3G-902 |
| Vehicle Manufacturer | Honda |
| Vehicle Model | Step Wagon RF1 |
| Engine | 2.0L B20B DOHC Petrol |
| Transmission | Automatic |
| Fuel Type | Petrol |
| Module Type | Engine Control Unit (ECU / ECM) |
| Engine Management | Honda PGM-FI |
| Condition | Genuine OEM Used Unit |
| Testing Status | Fully Tested |
| Warranty | 30 Days |
| Shipping | Worldwide Available |
Compatibility Table
| Make | Model | Chassis | Engine | Transmission | Year Range |
|---|---|---|---|---|---|
| Honda | Step Wagon | RF1 | 2.0L B20B DOHC | Automatic | 1996–2001* |
| Honda | Step Wagon | RF2 | 2.0L B20B DOHC | Automatic | 1996–2001* |
*Compatibility depends on VIN, production date, drivetrain, emissions specification, and software calibration. Always verify the part number 37820-P3G-902 before ordering. Listings consistently identify this ECU as compatible with Honda Step Wagon RF1/RF2 B20B automatic models.
What Does the Engine Control Unit Do?
The ECU is responsible for controlling and monitoring numerous engine functions, including:
- Fuel injection timing
- Ignition timing
- Air-fuel mixture control
- Idle speed regulation
- Engine sensor monitoring
- Cold start management
- Emissions control
- Diagnostic fault detection
- Engine performance optimization
- Communication with vehicle control systems
A properly functioning ECU ensures reliable starting, smooth acceleration, reduced emissions, and optimal fuel economy.
Common Symptoms of a Faulty ECU
A faulty ECU may cause:
- Check Engine Light illuminated
- Engine cranks but does not start
- Rough idle
- Engine stalling
- Poor fuel economy
- Hesitation during acceleration
- Misfires
- Loss of engine power
- Diagnostic communication failures
- Intermittent starting problems
Honda technicians and owners recommend replacing the ECU only after verifying sensors, wiring, and matching the exact Honda part number to avoid compatibility issues.
Why Buy from Automan Spare Parts?
Automan Spare Parts supplies genuine OEM automotive electronic modules sourced from tested donor vehicles.
Benefits of Buying From Us
- Genuine OEM Honda Parts
- Fully Tested Before Dispatch
- Worldwide Express Shipping
- Competitive Prices
- Secure Protective Packaging
- Fast Order Processing
- Expert Compatibility Assistance
- 30-Day Warranty
We stock thousands of genuine OEM automotive electronic modules including ECUs, BCMs, TCMs, ABS modules, Smart Key ECUs, Hybrid Controllers, Navigation Systems, and Climate Control Modules.
Installation Information
Before installation, please note:
- Verify the ECU part number matches exactly.
- Immobilizer programming may be required on certain vehicles.
- Professional installation is recommended.
- Clear stored diagnostic trouble codes after installation.
- Inspect the wiring harness and connectors before replacing the ECU.
Using the exact OEM part number is the most reliable method of ensuring compatibility and proper engine operation.
Order Honda Step Wagon RF1 ECU 37820-P3G-902 Today
Restore your vehicle's factory performance with a Genuine OEM Honda Step Wagon RF1 2.0L DOHC Automatic Engine Control Unit ECU 37820-P3G-902 from Automan Spare Parts.
If you're unsure about compatibility, simply send us your VIN number or clear photos of your existing ECU label, and our technical team will verify the correct replacement before you place your order.
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