Description
Part Description
This Engine Control Module (ECM) was removed from a 2003 Mercury Sable equipped with a 3.0L DOHC engine. The electronic control unit is located on the right-hand firewall in the engine compartment and carries ID marking 3F1A-RB. Our technicians have inspected this ECM and it is currently on the shelf ready for immediate shipment.
The Engine Control Module is the computer brain that manages your vehicle’s engine performance, fuel injection, ignition timing, and emissions systems. When ECMs fail, symptoms include poor fuel economy, rough idling, stalling, or the check engine light staying on. Common causes of ECM failure include electrical surges, corrosion, or internal component wear over time.
At 603 Auto Salvage, we maintain over 50,000 quality used parts from more than 1,100 vehicles in our Plaistow, New Hampshire facility. All parts are inspected before sale and come with our standard warranty. Browse our extensive inventory online or call us to verify compatibility and availability for your specific vehicle needs. 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 # | 6791 |
| OEM Part Number | Contact for OEM# |
| Side | N/A |
| Part Grade | X — Good working condition, inspected and ready to ship from engine compartment location |
| Warranty | 90-Day Warranty (Standard warranty for electronic control modules and computer components) |
| Type | Used OEM |
Vehicle Information (Donor)
| Year / Make / Model | 2003 MERCURY SABLE |
| VIN | N/A |
| Vehicle Stock # | SABPCM |
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 |
| ✅ Housing Integrity | No cracks or physical damage to case |
| ✅ Mounting Tabs | Secure and intact for proper installation |
| ✅ Internal Components | No signs of moisture damage or corrosion |
| ✅ ID Markings | 3F1A-RB identification clearly visible |
Compatibility — What Vehicles Does This Part Fit?
Based on interchange #6791, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2000-2005 | Ford | Taurus | 3.0L DOHC engine – verify ECM ID number |
| 2000-2005 | Mercury | Sable | 3.0L DOHC engine – verify ECM ID number |
| 2001-2004 | Ford | Escape | 3.0L V6 engine applications |
| 2001-2006 | Mazda | Tribute | 3.0L V6 engine applications |
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 2003 Mercury Sable?
This ECM is specifically from a 2003 Mercury Sable with 3.0L DOHC engine. You should verify the ID number 3F1A-RB matches your current ECM for proper compatibility.
Does this Engine Control Module need programming?
Most ECMs require programming or flashing to match your vehicle’s VIN and specifications. Contact your dealer or qualified technician to program the module after installation.
What are signs that my ECM is failing?
Common symptoms include check engine light, poor fuel economy, rough idling, stalling, or engine performance issues. A diagnostic scan can help confirm ECM-related trouble codes.
How do I install this Engine Control Module?
The ECM is located on the right firewall in the engine compartment. Disconnect the battery, unplug electrical connectors, remove mounting bolts, and reverse for installation. Professional installation recommended.
Is this a remanufactured or used ECM?
This is a genuine used OEM Engine Control Module removed from a donor vehicle. It has been inspected for proper function and comes with our 90-day warranty.
Related Parts & Resources
OEM Part Numbers & Cross-Reference
Looking for this part by number? Here are the reference numbers:
| ECM ID Number | 3F1A-RB |
| Engine Application | 3.0L DOHC V6 |
| Location | Right-hand firewall, engine 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 | $200-$350 | Varies | Non-OEM fitment, quality varies |
| Other Salvage Yards | $75-$125 | 30–60 days | Varies in quality and testing |
| 603 Auto Salvage | $50 | 90-Day Warranty | Tested, Grade X, ships in 24hrs |
Installation Notes
- Always disconnect battery before removing or installing ECM
- Take photos of connector positions before disconnecting wires
- Handle ECM carefully to avoid static electricity damage
- Verify ECM ID number matches before installation
- Have ECM programmed by dealer or qualified technician 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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