Description
Part Description
This Grade A Engine Control Module (ECM) was removed from a 2006 Honda Civic with a 1.8L SOHC engine and automatic transmission. The ECM is located behind the battery tray and carries OEM part number 37820-RNA-A61. This electronic brain box has been thoroughly inspected and tested to ensure proper operation and is currently on our shelf ready to ship.
The Engine Control Module is the central computer that manages your Honda Civic’s engine performance, fuel injection, ignition timing, and emissions systems. When an ECM fails, you may experience poor fuel economy, rough idling, stalling, or check engine lights. This critical component requires proper programming to match your vehicle’s VIN and specifications for optimal performance.
At 603 Auto Salvage, we maintain over 50,000 quality used parts from more than 1,100 vehicles in our Plaistow, NH facility. Our experienced team carefully inspects each electronic component before it goes on the shelf. Contact us to verify compatibility with your specific Honda Civic or browse our extensive online inventory for additional Honda parts. 50,000+ parts in stock from over 1,100 vehicles. Contact us or call (603) 392-7313 for anything you need.
Part Specifications
| Part | Engine Control Module (ECM) – Electronic Brain Box |
| Interchange # | 50423 |
| OEM Part Number | 37820-RNA-A61 |
| Side | N/A |
| Part Grade | A — Grade A – 130K miles, tested and verified working condition, ready to ship |
| Warranty | 90-Day Warranty (Standard warranty for tested electronic components under 150K miles) |
| Type | Used OEM |
Vehicle Information (Donor)
| Year / Make / Model | 2006 HONDA CIVIC |
| VIN | N/A |
| Vehicle Stock # | 1003242587 |
Our Testing & Inspection Process
Every part at 603 Auto Salvage is inspected before listing. Here is what was verified on this Engine Control Module (ECM) – Electronic Brain Box:
| ✅ Connector Pins | All pins clean and undamaged, no corrosion detected |
| ✅ Housing Integrity | Case intact with no cracks or water damage |
| ✅ Circuit Board | Internal components visually inspected, no burn marks |
| ✅ Programming Status | Module powers on and communicates properly |
Compatibility — What Vehicles Does This Part Fit?
Based on interchange #50423, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2006 | Honda | Civic | 1.8L SOHC engine with automatic transmission, Canada market vehicles |
Questions? Need a shipping quote? Call us now:
603 Auto Salvage | 233 Main St, Plaistow, NH 03865
Mon–Fri 8am–4:30pm | Sat 8am–2pm | Sun Closed
Warranty & Shipping
Frequently Asked Questions
Does this ECM need to be programmed for my 2006 Honda Civic?
Yes, this Engine Control Module will need to be programmed by a Honda dealer or qualified technician to match your vehicle’s VIN and specifications. Programming ensures proper communication with other vehicle systems.
What are signs that my Honda Civic ECM is failing?
Common symptoms include check engine lights, poor fuel economy, rough idling, stalling, or the engine not starting. You may also experience transmission shifting issues since the ECM communicates with the transmission control module.
Is this the same ECM used in US market Honda Civics?
This specific unit is from a Canada market vehicle and may have different programming or specifications than US models. Contact us to verify compatibility with your specific vehicle before ordering.
Can I install this ECM myself?
While the physical installation involves unplugging the old module and connecting the new one, professional programming is required afterward. Most DIY mechanics can handle the removal and installation but will need dealer or shop programming services.
What causes Honda Civic ECMs to fail?
ECM failure can result from electrical surges, water damage, corrosion, or normal wear over time. Jump starting incorrectly or electrical system problems can also damage the sensitive electronic components inside the module.
Related Parts & Resources
OEM Part Numbers & Cross-Reference
Looking for this part by number? Here are the reference numbers:
| Honda OEM Part Number | 37820-RNA-A61 |
| Interchange Number | 50423 |
| Engine Type | 1.8L SOHC |
| Transmission | Automatic |
Price Comparison — Why Used OEM Makes Sense
| Source | Price Range | Warranty | Notes |
|---|---|---|---|
| Dealer (New OEM) | $450-650 | 1 year | Brand new, longest wait time |
| Aftermarket | $200-350 | Varies | Non-OEM fitment, quality varies |
| Other Salvage Yards | $100-150 | 30–60 days | Varies in quality and testing |
| 603 Auto Salvage | $75 | 90-Day Warranty | Tested, Grade A, ships in 24hrs |
Installation Notes
- Disconnect battery negative terminal before removing ECM to prevent electrical damage
- Take photos of connector positions before disconnecting to ensure proper reconnection
- Handle the module carefully and avoid touching circuit board components
- Ensure all connectors click securely into place during installation
- Have the module professionally programmed immediately after installation for proper operation
🔍 Free Fitment Check
Call us with your VIN and we will verify compatibility for free. No obligation, no pressure — just answers.
Our parts specialists check interchange data in real-time
Estimated Shipping Costs by Region
This part ships via FedEx Ground. Prices are estimates — call for an exact quote to your zip code.
| Region | Estimated Cost | Transit Time |
|---|---|---|
| New England (NH, MA, ME, VT, CT, RI) | $15 – $30 | 1–3 business days |
| Northeast (NY, NJ, PA, MD, VA) | $20 – $40 | 2–4 business days |
| Southeast (FL, GA, NC, SC, TN) | $25 – $45 | 3–5 business days |
| Midwest (OH, MI, IL, IN, WI, MN) | $30 – $50 | 3–5 business days |
| Southwest (TX, AZ, NM, OK) | $35 – $55 | 4–6 business days |
| West Coast (CA, OR, WA) | $40 – $65 | 5–7 business days |
Local pickup is always free. Free delivery within 30 miles of Plaistow, NH.
Why Buy From 603 Auto Salvage?
- 50,000+ parts in stock from over 1,100 vehicles on-site in Plaistow, NH
- Every part inspected before listing — no guesswork
- Family-owned salvage yard — real people, not a call center
- 90-Day Warranty on this part
- Fast shipping — most orders ship within 24 hours
- Competitive pricing — save 50–70% vs dealer prices
- Serving New Hampshire, Massachusetts & all 50 states
Ready to order? Call (603) 392-7313 or add to cart above. We are here to help.




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