Description
Part Description
This Engine Control Module (ECM) was removed from a 2009 Ford Focus donor vehicle and has been inspected by our parts specialists. The unit is currently on our shelf and ready for immediate shipment. This electronic brain box controls critical engine functions and carries part number 590 with ID 8S4A-ARB thru ARD 8S4A-12A650-ARD.
The Engine Control Module is essential for proper engine operation, managing fuel injection, ignition timing, emissions controls, and other vital engine functions. ECMs commonly fail due to electrical surges, water damage, or internal component wear over time. When your ECM fails, symptoms include engine stalling, poor fuel economy, rough idling, or the engine failing to start altogether.
603 Auto Salvage maintains over 50,000 quality used auto parts in stock from more than 1,100 vehicles. Our experienced team can help you find the exact ECM or other parts you need for your Ford Focus. Browse our online inventory or contact us directly to verify compatibility and availability for your specific vehicle. 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 # | 1507 |
| OEM Part Number | 8S4A-12A650-ARD |
| Side | N/A |
| Part Grade | C — Grade C – Functional condition, chipped connector plug noted, inspected and ready to ship |
| Warranty | 30-Day Warranty (Standard warranty for electronic control modules due to complexity of programming requirements) |
| Type | Used OEM |
Vehicle Information (Donor)
| Year / Make / Model | 2009 FORD FOCNRS |
| VIN | N/A |
| Vehicle Stock # | 0321242230 |
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 Integrity | Chipped plug noted but functional |
| ✅ Circuit Board Condition | No visible damage or corrosion |
| ✅ Housing Inspection | Solid case with no cracks |
| ✅ Pin Connections | All pins present and intact |
| ✅ Part Number Verification | Confirmed 8S4A-12A650-ARD |
Compatibility — What Vehicles Does This Part Fit?
Based on interchange #1507, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2009 | Ford | Focus | Contact us for full compatibility verification |
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 need to be programmed for my 2009 Ford Focus?
Yes, most ECMs require programming to match your vehicle’s VIN and specifications. We recommend having this done by a qualified technician or Ford dealer after installation.
What causes Ford Focus ECM failure?
Common causes include electrical surges from jump starting, water damage, overheating, or internal component failure over time. Symptoms include stalling, poor performance, or no-start conditions.
How do I know if my ECM is bad?
Signs include engine stalling, rough idle, poor fuel economy, check engine light, or complete failure to start. A diagnostic scan can help confirm ECM-related fault codes.
Is this the same as a PCM or ECU?
ECM (Engine Control Module), PCM (Powertrain Control Module), and ECU (Electronic Control Unit) are similar terms. This specific unit controls engine functions in your Ford Focus.
What’s included with the ECM purchase?
You receive the complete Engine Control Module unit as shown. Programming, installation, and any required adapters are not included and may be needed.
Related Parts & Resources
OEM Part Numbers & Cross-Reference
Looking for this part by number? Here are the reference numbers:
| Ford Part Number | 8S4A-12A650-ARD |
| Interchange Number | 1507 |
| Internal Part Code | 590 |
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 | $100-150 | 30–60 days | Varies in quality and testing |
| 603 Auto Salvage | $75 | 30-Day Warranty | Tested, Grade C, 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 – avoid static electricity and moisture exposure
- Have the new ECM 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
- 30-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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