Description
Part Description
This engine control module (ECM) was removed from a 2009 Hyundai Sonata equipped with a 3.3L engine. The electronic control unit has been professionally inspected and tested to ensure proper functionality. It is currently on our shelf and ready for immediate shipment to get your vehicle back on the road.
The engine control module is the brain of your vehicle’s engine management system, controlling fuel injection, ignition timing, emissions systems, and other critical engine functions. ECMs commonly fail due to electrical surges, water damage, or internal component wear over time. When your ECM fails, symptoms include no-start conditions, rough idling, poor fuel economy, 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 can help you find the exact ECM you need for your Hyundai Sonata. Contact us today to verify compatibility and availability, or browse our extensive online inventory for additional Hyundai 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 Control Unit |
| Interchange # | 51725 |
| OEM Part Number | 39110-3C765 |
| Side | N/A |
| Part Grade | X — Grade X – Inspected and tested, ready to ship from shelf |
| Warranty | 90-Day Warranty (Standard warranty for electronic control modules) |
| Type | Used OEM |
Vehicle Information (Donor)
| Year / Make / Model | 2009 HYUNDAI SONATA |
| VIN | N/A |
| Vehicle Stock # | PCM6718 |
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 Control Unit:
| ✅ Connector Pins | All pins intact and free of corrosion |
| ✅ Housing Integrity | No cracks or damage to ECM case |
| ✅ Circuit Board | Visually inspected for burn marks or component damage |
| ✅ Programming Status | Unit ready for reprogramming to your vehicle |
| ✅ Part Number Verification | Confirmed OEM part number 39110-3C765 |
Compatibility — What Vehicles Does This Part Fit?
Based on interchange #51725, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2009 | Hyundai | Sonata | 3.3L engine only – 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 2009 Hyundai Sonata?
This ECM is compatible with 2009 Hyundai Sonata models equipped with the 3.3L engine. The unit will need to be programmed to your specific vehicle by a qualified technician or dealership.
Does the ECM come pre-programmed?
No, this ECM will need to be programmed to match your vehicle’s VIN and specifications. This service is typically performed by a Hyundai dealership or qualified automotive locksmith.
What causes ECM failure in Hyundai Sonatas?
Common causes include electrical surges from jump-starting, water damage from flooding, internal component wear, and voltage spikes from alternator problems. Symptoms include no-start conditions and persistent check engine lights.
How do I know if my ECM is bad?
Signs of ECM failure include engine not starting, rough idle, poor fuel economy, transmission shifting problems, and check engine lights that return after clearing. Professional diagnosis is recommended to confirm ECM failure.
Is this a genuine Hyundai part?
Yes, this is an original equipment manufacturer (OEM) part with Hyundai part number 39110-3C765, not an aftermarket replacement.
Related Parts & Resources
OEM Part Numbers & Cross-Reference
Looking for this part by number? Here are the reference numbers:
| Hyundai Part Number | 39110-3C765 |
| Interchange Number | 51725 |
| Part Type | Engine Control Module |
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 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 ECM carefully and avoid static electricity – use anti-static wrist strap
- ECM must be programmed to your vehicle’s VIN after installation
- Clear all diagnostic codes after programming is complete
🔍 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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