Description
Part Description
This engine control module (ECM) was removed from a 2004 Dodge Dakota Regular Cab with 3.7L engine and automatic transmission. The ECM is located on the right fender and carries ID number 56030009AD. This electronic control unit has been inspected and tested for proper operation and is currently on our shelf ready to ship.
The Engine Control Module is the computer brain that manages your Dakota’s engine performance, fuel injection, ignition timing, and emissions systems. When an ECM fails, symptoms include poor fuel economy, rough idling, stalling, or the check engine light staying on. A faulty ECM can also prevent the vehicle from starting or cause erratic engine behavior that affects drivability and 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 inspects every electronic component to ensure reliable performance. Contact us to verify compatibility with your specific Dakota or browse our extensive inventory of Dodge truck parts online. 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 # | 7166 |
| OEM Part Number | 56030009AD |
| Side | N/A |
| Part Grade | X — Good working condition, inspected and tested, ready to ship |
| Warranty | 90-Day Warranty (Standard warranty for tested electronic control modules) |
| Type | Used OEM |
Vehicle Information (Donor)
| Year / Make / Model | 2004 DODGE TRUCKS DAKOTA |
| VIN | N/A |
| Vehicle Stock # | DAKECM24 |
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 |
| ✅ Housing Integrity | Case intact with no cracks or water damage |
| ✅ Circuit Board | Internal components visually inspected, no burn marks |
| ✅ ID Number Verification | Part number 56030009AD confirmed and readable |
| ✅ Mounting Tabs | All mounting points secure and undamaged |
Compatibility — What Vehicles Does This Part Fit?
Based on interchange #7166, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2004 | Dodge | Dakota | 3.7L engine, automatic transmission, regular cab – Contact us for full compatibility list |
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
Will this ECM work in my 2004 Dodge Dakota?
This ECM is specifically for 2004 Dakota with 3.7L engine and automatic transmission. The part number 56030009AD must match your vehicle’s requirements for proper operation.
Does the ECM need to be programmed after installation?
Yes, most ECMs require programming to match your vehicle’s VIN and specific configuration. This should be done by a qualified technician with the proper diagnostic equipment.
What are signs that my Dakota’s ECM is failing?
Common symptoms include check engine light, poor fuel economy, rough idling, stalling, hard starting, or erratic engine performance. A diagnostic scan can help confirm ECM-related fault codes.
Is this a remanufactured or original ECM?
This is an original OEM ECM removed from a donor vehicle. It has been inspected and tested but is not remanufactured or rebuilt.
Can I return this ECM if it doesn’t work in my truck?
Yes, we offer a 90-day warranty on this ECM. If it fails to function properly when installed correctly, we will work with you on a replacement or refund.
Related Parts & Resources
OEM Part Numbers & Cross-Reference
Looking for this part by number? Here are the reference numbers:
| OEM Part Number | 56030009AD |
| Interchange Number | 7166 |
| Engine Application | 3.7L V6 Automatic Transmission |
Price Comparison — Why Used OEM Makes Sense
| Source | Price Range | Warranty | Notes |
|---|---|---|---|
| Dealer (New OEM) | $400-600 | 1 year | Brand new, longest wait time |
| Aftermarket | $250-400 | Varies | Non-OEM fitment, quality varies |
| Other Salvage Yards | $150-200 | 30–60 days | Varies in quality and testing |
| 603 Auto Salvage | $125 | 90-Day Warranty | Tested, Grade X, ships in 24hrs |
Installation Notes
- Disconnect battery before removing old ECM to prevent electrical damage
- Take photos of connector positions before disconnecting wiring harnesses
- Handle ECM carefully – avoid static electricity by grounding yourself first
- Ensure all connectors click securely into place during installation
- Have ECM programmed by dealer or qualified shop after installation
🔍 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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