Description
Part Description
This Engine Control Module (ECM) was removed from a 2004 Dodge Caravan equipped with a 3.8L FWD engine. The ECM, also known as the engine brain box, has been professionally inspected and is currently on our shelf ready for immediate shipment. This OEM unit carries part number 04727477AH and is located in the left fender compartment of the vehicle.
The Engine Control Module is the central computer that manages your vehicle’s engine performance, fuel injection, ignition timing, and emissions systems. ECMs commonly fail due to electrical surges, moisture damage, or internal component wear over time. When your ECM fails, you may experience no-start conditions, poor fuel economy, rough idling, or check engine lights that won’t clear.
At 603 Auto Salvage, we maintain over 50,000 quality used parts in stock from more than 1,100 vehicles. Our experienced team carefully inspects each component to ensure reliability. Contact us today to verify compatibility with your specific vehicle or browse our extensive inventory online for additional Dodge 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 # | 7496 |
| OEM Part Number | 04727477AH |
| Side | N/A |
| Part Grade | X — Grade X – Inspected and ready to ship, located in left fender compartment |
| Warranty | 90-Day Warranty (Standard warranty for electronic control modules) |
| Type | Used OEM |
Vehicle Information (Donor)
| Year / Make / Model | 2004 DODGE TRUCKS CARAVN |
| VIN | N/A |
| Vehicle Stock # | CARECM24 |
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 straight and free of corrosion |
| ✅ Housing Integrity | Case intact with no cracks or damage |
| ✅ Mounting Tabs | Secure mounting points verified |
| ✅ Internal Components | No signs of moisture or burn damage |
| ✅ Circuit Board | Visually inspected for component integrity |
Compatibility — What Vehicles Does This Part Fit?
Based on interchange #7496, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2004 | Dodge | Caravan | 3.8L FWD engine – 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 Caravan?
This ECM is specifically for 2004 Dodge Caravan models with 3.8L FWD engines. Programming may be required for proper operation in your vehicle.
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 proper diagnostic equipment.
What are signs that my ECM is failing?
Common symptoms include no-start conditions, rough idling, poor fuel economy, transmission shifting issues, and persistent check engine lights that return after clearing.
Is this the same as a PCM or ECU?
ECM, PCM, and ECU are often used interchangeably but have slight differences. This unit specifically controls engine functions and may be part of a larger powertrain control system.
What causes ECM failure in Dodge vehicles?
ECMs commonly fail due to electrical voltage spikes, moisture intrusion, extreme temperatures, or normal wear of internal components over time.
Related Parts & Resources
OEM Part Numbers & Cross-Reference
Looking for this part by number? Here are the reference numbers:
| OEM Part Number | 04727477AH |
| Interchange Number | 7496 |
| Location | Left fender compartment |
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 | $150-250 | 30–60 days | Varies in quality and testing |
| 603 Auto Salvage | $100 | 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 disconnection for reference
- Handle the ECM carefully and avoid static electricity discharge
- Ensure all connections are secure and properly seated
- Have the new ECM programmed by a qualified technician before first start
🔍 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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