Welcome to 603 Auto Salvage, We Sell Quality Used Auto Parts at Affordable prices.
Welcome to 603 Auto Salvage, We Sell Quality Used Auto Parts at Affordable prices.
$100.00
Used engine control module (ECM) for 2009 Mazda Mazda3 with 2.0L automatic transmission. This electronic brain box has been inspected and is ready to ship. Interchange #51012, Stock #PCM3916.
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This engine control module (ECM) was removed from a 2009 Mazda Mazda3 equipped with a 2.0L engine and automatic transmission. The unit is mounted by the battery and carries ID LFS9-18881-B thru G. This electronic brain box has been professionally inspected and is currently on our shelf ready for immediate shipment.
The engine control module is the central computer that manages your vehicle’s engine performance, fuel injection, ignition timing, and emissions systems. Common reasons for ECM replacement include water damage, electrical surges, internal component failure, or accident damage. A faulty ECM can cause poor fuel economy, rough idling, stalling, or prevent the vehicle from starting altogether.
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 carefully inspects each electronic component to ensure reliable performance. Contact us to verify compatibility with your specific vehicle or browse our extensive online inventory for additional Mazda parts. 50,000+ parts in stock from over 1,100 vehicles. Contact us or call (603) 392-7313 for anything you need.
| Part | Engine Control Module (ECM) – Electronic Brain Box |
| Interchange # | 51012 |
| OEM Part Number | LFS9-18881-B thru G |
| Side | N/A |
| Part Grade | X — Good working condition, inspected and ready to ship from shelf stock |
| Warranty | 90-Day Warranty (Standard warranty for tested electronic components) |
| Type | Used OEM |
| Year / Make / Model | 2009 MAZDA MAZDA3 |
| VIN | N/A |
| Vehicle Stock # | PCM3916 |
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 straight and corrosion-free |
| ✅ Housing Integrity | No cracks or damage to ECM case |
| ✅ Water Damage | No signs of moisture or corrosion |
| ✅ Circuit Board | Internal components visually inspected |
| ✅ Mounting Points | All mounting tabs and brackets intact |
Based on interchange #51012, this part fits the following vehicles. Always confirm fitment with your mechanic before purchasing.
| Year(s) | Make | Model | Notes |
|---|---|---|---|
| 2009 | Mazda | Mazda3 | 2.0L engine with automatic transmission, ID LFS9-18881-B thru G |
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
This ECM fits 2009 Mazda3 models with 2.0L automatic transmission. Verify your current ECM has ID number LFS9-18881-B through G for proper compatibility.
Most ECMs require programming to match your vehicle’s VIN and security system. Contact a qualified technician or Mazda dealer for programming services after installation.
Common symptoms include check engine lights, poor fuel economy, rough idling, stalling, or the vehicle not starting. These issues can also indicate other problems, so proper diagnosis is recommended.
Check the ID number on your current ECM, which should read LFS9-18881-B through G. The ECM is typically mounted near the battery in 2009 Mazda3 vehicles.
ECM failure can result from water damage, electrical surges, battery issues, or normal wear over time. Accident damage and exposure to extreme temperatures can also cause electronic component failure.
Looking for this part by number? Here are the reference numbers:
| Mazda Part ID | LFS9-18881-B thru G |
| Interchange Number | 51012 |
| Stock Number | PCM3916 |
| 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 |
🔍 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
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.
Ready to order? Call (603) 392-7313 or add to cart above. We are here to help.
| Weight | 3 lbs |
|---|
RatingGreat yard ! Parts aren’t damaged and it is the cleanest yard I’ve ever seen! The staff is pretty amazing too !!
good lead times and customer service, look forward to more business here
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Great service! The best price and condition for the Porsche Cayenne parts needed to finish the job. Radiator core support and headlight fit perfectly!
Drove from new york, Julie was a sweetheart asked questions to make sure that my ECU was the proper part number and was compatible with my manual Accord, price was phenomenal I highly recommend them for any parts your car may need. Definitely the best salvage yard around
Great experience at 603 Auto Salvage! ⭐️ The owner and employee were both extremely helpful and easy to work with. I was able to find everything I needed in one stop — about seven different items — which saved me a lot of time and hassle. Good selection, fair pricing, and friendly service. Definitely recommend checking them out if you're looking for parts. I’ll be back again! 👍🔧🚗
I had a great experience with 603 Auto Salvage Inc. The team was very helpful and quickly found the exact part I needed. They kept me informed and made the pickup process easy. The price was very fair, and the service was excellent. I would definitely recommend them and will use them again if I need parts in the future.
Excellent support, she helped me with my order service was fast and exactly what I needed.Very Professional.
The customer service at 603 was great. They found the part I needed very quickly and promptly notified me when it was ready to be picked up. There wasn’t any other place in the area that had what I needed. The price was very good also. I will be using them again for sure.
I had a great experience. They didn’t just look up the part I needed they took the time to explain how to install it and made sure I understood everything. I even received a call back, which I really appreciated. Everyone I spoke with was friendly and patient, and I never felt brushed off. I truly felt taken care of. Highly recommend if you want knowledgeable people who actually care about helping you. Kristy Thanks Guys!
Drove from Connecticut to get here. Had parts for a relatively rare car that dozens of other places didn't have. I got a hood, fender and bumper cover that were in near mint condition for a fifteen year old car. They pulled all the parts for me and had everything ready within an hour. Very reasonably priced. Highly recommend
Exceptional service, large selection of parts, will come back if more Audi parts are needed. A++
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Confianza y buen servicio ala comunidad ispana
If you’re not getting your car parts here then what are you doing?!! The best reliable car place in New Hampshire❤️ 100000% recommended
Great service! Picked up a door for my car and it was in good condition.
Purchased a wheel they had it ready the next day , not damaged, and ready for pickup. Julie was helpful at the front desk giving a specific time frame and held to it.
Super Friendly, Easy to work with, Accurate inventory, and great prices
Great place, have a wide selection of cars. They definitely will have what you need if not they will help a ton!
Great customer service and great prices!!! I purchased an engine that was in excellent condition and could not beat the price. The woman at the desk, Julie, was very helpful and knowledgeable. They put the engine on the back of the truck for me And secured it as well. I highly recommend this place. I will be coming here for any parts I need.
Eldy was awesome he helped load my car door and was informative. The lady Julie at the counter was super helpful and got back to me fast regarding the replacement door I needed. Highly recommended
Bought a seat belt from here and a seat great service very polite will recommend
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