Description
Part Description
This engine control module (ECM) was removed from a 2005 Chevrolet Malibu equipped with a 3.5L engine. The part has ID number 12597846 and is designed for VIN Z (4th digit, New Style) applications. Our technicians have inspected this electronic control unit 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. This critical component requires replacement when damaged by electrical surges, moisture intrusion, or internal component failure over time.
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 can help you find the exact ECM your vehicle needs. Browse our online inventory or call us to speak with a parts specialist about your specific application. 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 # | 7579 |
| OEM Part Number | 12597846 |
| Side | N/A |
| Part Grade | X — Grade X – Inspected electronic control module, ready to ship |
| Warranty | 90-Day Warranty (Standard warranty for electronic control modules) |
| Type | Used OEM |
Vehicle Information (Donor)
| Year / Make / Model | 2005 CHEVROLET MALIBU |
| VIN | N/A |
| Vehicle Stock # | PCM6862 |
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 intact and free of corrosion |
| ✅ Housing Integrity | No cracks or damage to ECM case |
| ✅ Circuit Board | Internal components visually inspected |
| ✅ Identification Numbers | Part ID 12597846 verified and documented |
Compatibility — What Vehicles Does This Part Fit?
Based on interchange #7579, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2005 | Chevrolet | Malibu | 3.5L engine, VIN Z (4th digit, New Style) – 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 need to be programmed for my 2005 Malibu?
Yes, this engine control module will need to be programmed by a qualified technician or dealership to match your vehicle’s VIN and security system. Programming is not included with the part purchase.
How do I know if my ECM has failed?
Common symptoms include check engine light, poor fuel economy, rough idling, stalling, or failure to start. A diagnostic scan can confirm ECM-related trouble codes before replacement.
What’s the difference between ECM, PCM, and ECU?
ECM (Engine Control Module) specifically controls engine functions, while PCM (Powertrain Control Module) controls both engine and transmission. ECU is a general term for any electronic control unit.
Is this the correct ECM for my 3.5L Malibu?
This ECM fits 2005 Chevrolet Malibu with 3.5L engine and VIN Z as the 4th digit. Verify your VIN code and engine size before ordering to ensure proper fitment.
Can I install this ECM myself?
While physically installing the ECM is straightforward, it requires professional programming to your vehicle’s specifications. Most customers have installation and programming done by a qualified shop.
Related Parts & Resources
OEM Part Numbers & Cross-Reference
Looking for this part by number? Here are the reference numbers:
| GM Part ID | 12597846 |
| Interchange Number | 7579 |
| Application | 2005 Malibu 3.5L VIN Z |
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 disconnecting wiring harnesses
- Handle ECM carefully – avoid static electricity and moisture exposure
- Have vehicle towed to programming location as it may not run with unprogrammed ECM
🔍 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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