Description
Part Description
This engine control module (ECM) was removed from a 2008 Mazda MAZ6 equipped with a 2.3L 4-cylinder engine and automatic transmission. The unit is designed for US market vehicles with low emissions requirements and carries ID numbers L35N 18 881C and 7M81 12A650 AD. This electronic brain box has been inspected by our technicians and is currently on the shelf ready to ship.
The engine control module is the central computer that manages critical engine functions including fuel injection timing, ignition timing, emissions control, and transmission communication. ECMs commonly fail due to electrical surges, water damage, or internal component degradation over time, causing symptoms like rough idle, poor fuel economy, transmission shifting issues, or complete no-start conditions. When your ECM fails, a quality used OEM replacement is often the most cost-effective solution.
At 603 Auto Salvage, we maintain an inventory of over 50,000 used auto parts from more than 1,100 vehicles. Our experienced team carefully inspects each electronic component to ensure reliable performance. Contact us to verify compatibility with your specific vehicle or browse our extensive online catalog for additional Mazda parts and accessories. 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 # | 50891 |
| OEM Part Number | L35N 18 881C / 7M81 12A650 AD |
| Side | N/A |
| Part Grade | X — Inspected electronic control module from 2.3L AT vehicle, ready to ship |
| Warranty | 90-Day Warranty (Standard warranty for tested electronic components) |
| Type | Used OEM |
Vehicle Information (Donor)
| Year / Make / Model | 2008 MAZDA MAZ6 |
| VIN | N/A |
| Vehicle Stock # | MAZ2008 |
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:
| ✅ Physical Housing Inspection | No cracks, corrosion, or damage to ECM casing |
| ✅ Connector Pin Condition | All electrical pins clean and undamaged |
| ✅ Internal Component Check | No signs of water damage or burnt components |
| ✅ Part Number Verification | OEM numbers confirmed and legible |
| ✅ Mounting Bracket Integrity | All mounting points intact and secure |
Compatibility — What Vehicles Does This Part Fit?
Based on interchange #50891, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2008 | Mazda | MAZ6 | 2.3L 4-cylinder engine, automatic transmission, US market |
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 2008 Mazda 6?
This ECM is specifically for 2008 Mazda 6 models with 2.3L 4-cylinder engines and automatic transmissions. Contact us with your VIN to confirm exact compatibility before ordering.
Does the ECM need to be programmed after installation?
Yes, most ECMs require programming to your vehicle’s VIN and may need key programming. We recommend having installation and programming performed by a qualified technician or Mazda dealer.
What are common signs of ECM failure in a Mazda 6?
Common symptoms include engine stalling, rough idle, poor fuel economy, transmission shifting problems, check engine light, or complete no-start condition. Professional diagnosis is recommended to confirm ECM failure.
How do I know if this is the right part number for my car?
Check your current ECM for the part numbers L35N 18 881C or 7M81 12A650 AD. You can also provide us with your VIN and we’ll verify compatibility with our parts database.
What’s included with this ECM purchase?
You’ll receive the complete engine control module as shown. Programming, installation, and any required keys or additional components are not included and must be arranged separately.
Related Parts & Resources
OEM Part Numbers & Cross-Reference
Looking for this part by number? Here are the reference numbers:
| Primary OEM Number | L35N 18 881C |
| Secondary OEM Number | 7M81 12A650 AD |
| Interchange Number | 50891 |
Price Comparison — Why Used OEM Makes Sense
| Source | Price Range | Warranty | Notes |
|---|---|---|---|
| Dealer (New OEM) | $800-1200 | 1 year | Brand new, longest wait time |
| Aftermarket | $400-600 | 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 and wait 10 minutes before removing old ECM to prevent electrical damage
- Take photos of wiring connections before disconnection for reference during installation
- Handle the ECM carefully and avoid static electricity – use anti-static wrist strap if available
- Ensure all electrical connections are clean and tight before powering up the system
- Have the ECM programmed by a qualified technician immediately 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.




Reviews
There are no reviews yet.