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Used OEM Engine Computers for Sale: ECM, ECU and PCM
Solve stalling, no-start and false sensor codes with a used OEM engine computer that matches your vehicle. We match the ECM, ECU or PCM to your VIN and part number, explain what programming it needs, and show you photos before it ships.
Find Your Used ECM
Free matched quote from a parts specialist
Have your VIN ready. Your specialist uses it with the part number on your old module to confirm an exact match. It is on the dashboard, the door jamb and your registration.
Free quote. No obligation.
1-888-383-2439Outside business hours? Send your request anytime and we will get back to you as soon as possible.
- BBB AccreditedRated A by the BBB
- 5-star Google reviewsFrom real customers
- Part number matchedChecked against your VIN
- Tracked deliveryShipped to your address
- Secure paymentsVisa, Mastercard, Amex, PayPal
Used ECMs From FirstChoice at a Glance
FirstChoice Used Auto Parts sells used OEM engine control modules (ECM), engine control units (ECU) and powertrain control modules (PCM) to buyers across the United States. Every engine computer is matched to the customer’s VIN and part number, photographed for approval before shipping, and covered by a 30-day parts warranty.
- What we sell
- Used OEM engine control modules (ECM), engine control units (ECU) and powertrain control modules (PCM)
- Fitment
- Matched by VIN and part number
- Warranty
- 30 days, parts only
- Shipping
- Tracked parcel delivery to the billing address on your card, targeted within 5 business days of photo approval
- Savings
- Up to 70% less than a new dealer part, plus 10% off when you order by phone
- Support
- 1-888-383-2439, Mon to Fri, 9 AM to 6 PM EST. Enquire anytime
Signs of a Failing ECM or PCM
The engine computer rarely fails, so rule out wiring and sensors first. These symptoms point to the module itself.
Check engine light with no clear cause
Codes return after the sensors and wiring they point to have been tested and found good.
Scan tool cannot communicate
A no-communication fault with the engine module, with power and ground confirmed, suggests internal failure.
Stalling, misfires or no start
No injector pulse or no spark command, with good fuel pressure and a good crank signal.
Harsh or erratic shifting
On vehicles where the PCM also controls the transmission, shift problems can come from the module.
Signs of water or heat damage
Corrosion at the connector or a burned smell after a jump start or flood points to a damaged module.
Seeing These Signs? Get a Matched ECM Quote
Free quote, no obligation. A parts specialist checks fitment against your VIN before you pay.
Why Buy Your Used ECM From Us
Engine computers that look identical carry different hardware and software for each engine, transmission and emissions package. Our process is built to get the exact part number the first time.
Matched by part number and VIN
We match the hardware part number on your original module to your VIN before quoting, so the connectors, engine and transmission calibration family line up.
See your engine computer before it ships
After you order, the supplier photographs the actual engine computer once it is pulled. Nothing ships until you approve those photos.
Straight answers on programming
Most engine computers must be programmed to your VIN, and many need the immobilizer or keys relearned. We explain what your vehicle needs and what to ask your shop or locksmith.
30-day parts warranty
Every used engine computer includes a 30-day parts warranty. If it arrives damaged or incorrect, we replace it or refund you.
- Up to70%less than new dealer prices
- 30-dayparts warranty on every order
- 5 daysdelivery target after photo approval
- 70+vehicle makes in our finder
Used ECMs for Popular Makes
Choose your make to start a matched quote. We source engine computers for most domestic and import cars, SUVs and trucks.
Don’t see your make? The finder lists more than 70 makes. Browse all vehicle makes or call 1-888-383-2439.
How Buying a Used ECM Works
Four steps from your vehicle details to delivery, with nothing shipped until you approve it.
Tell us your vehicle
Enter your year, make and model, and have your VIN and the part number from your old module ready.
Get your matched quote
A parts specialist confirms fit by VIN and part number, then sends your price, warranty term and shipping details.
Approve real photos
Once you order, you review photos of your actual engine computer before it leaves the supplier.
ECM ships to you
We aim to deliver within 5 business days of photo approval, with tracking sent by email.
Quality, Warranty and Shipping You Can Check
Clear terms before you buy, so there are no surprises after.
Condition and fit
- We confirm the engine computer is in stock and in good condition with the supplier before your order ships
- VIN and part number matched to your vehicle
- Photos of your actual engine computer for you to approve
Warranty and returns
- 30-day parts warranty on every used engine computer
- Damaged or incorrect part: replaced, or refunded in full if no replacement is available
- Parts only. Labor, including any programming, is not covered
Tracked delivery
- Shipped by parcel carrier to the billing address on your card
- Tracking details emailed within 2 days of shipment
- We aim to deliver within 5 business days of photo approval
- Inspect the package on arrival and report any damage
Used ECM Buying Guide
Know which part you need before you buy.
| Module | What it controls | Common on | What to match |
|---|---|---|---|
| ECM or ECU | Fuel, spark, emissions and engine sensors | Most vehicles. The two names mean the same module | Hardware part number and VIN |
| PCM | The engine and the automatic transmission in one module | Many Ford, GM, Chrysler, Dodge and Jeep vehicles | Part number, engine and transmission type |
| TCM | The transmission only, as a separate module | Vehicles with a standalone transmission controller | Part number and transmission code |
Match the hardware number
Use the number on the module label, not only the year, make and model. How to decode your VIN
Plan the programming
Line up a shop or mobile programmer before the module arrives. Mistakes to avoid
Fix the root cause
A shorted coil, injector or wire can damage a replacement module too. How to check used part quality
Used ECM FAQs
Where can I buy a used engine computer online?
You can request a used engine computer quote from FirstChoice Used Auto Parts online or by calling 1-888-383-2439, Monday to Friday, 9 AM to 6 PM EST. Send a request anytime and we will get back to you as soon as possible. We are based in Louisville, Kentucky, match every engine computer to your VIN and part number, and ship across the United States.
How much does a used engine computer cost?
Used engine computer prices vary with the vehicle, engine, transmission and part number and availability. A used OEM engine computer usually costs up to 70% less than a new one from a dealer, and you get 10% off when you order by phone. The fastest way to an exact price is a free quote using your VIN.
What is the difference between an ECM, ECU and PCM?
ECM (engine control module) and ECU (engine control unit) are two names for the computer that runs the engine. A PCM (powertrain control module) controls both the engine and the automatic transmission in one unit. We source all three.
Does a used ECM need to be programmed?
In most cases, yes. The module usually needs your VIN and the correct calibration written to it, and many vehicles need the immobilizer or keys relearned so the engine will start. Some older vehicles are plug and play. We tell you what applies to yours.
What are the signs of a bad ECM?
A check engine light with codes that return after proper testing, no communication with the scan tool, stalling, misfires, a no-start with no injector or spark command, and erratic shifting on PCM-controlled transmissions are common signs.
How do I find the part number on my ECM?
It is printed on the label on the module case. The module is usually in the engine bay, behind the glove box, or under the dash or a seat. Send us that number with your VIN.
Can a bad sensor or wire damage a replacement ECM?
Yes. A shorted ignition coil, injector, solenoid or chafed wire can burn out the same driver circuit in the replacement. Have the original fault found and repaired before the new module goes in.
Do your used engine computers come with a warranty?
Yes. Every used engine computer comes with a 30-day parts-only warranty. Labor costs are not covered. Full terms are in our warranty policy.
Do you ship used engine computers across the United States?
Yes. Engine computers ship by parcel carrier to the billing address on your card, with tracking details emailed within 2 days of shipment. See the shipping policy for details.
What Our Customers Say
“Prompt delivery of the correct part. Been six months or more and still going strong. Will for sure use this business again in the future.”
“Knowledgeable staff. Mike handled everything and made this easy. Car’s fixed, customer is happy in half of the time I had already spent elsewhere. Thanks guys”
“First choice really came through for me. They’re rep, John Jacobs. Was very helpful. I received the part within 1 week of ordering. I will definitely make them my “First Choice” again.”
A Real Parts Team You Can Reach
About FirstChoice Used Auto Parts
FirstChoice Used Auto Parts is a used OEM parts seller based in Louisville, Kentucky, serving drivers and repair shops across the United States. Every quote is handled by a parts specialist who checks fitment against your VIN before you pay.
- Louisville, Kentucky. Shipping across the United States
- BBB Accredited Business, rated A
- 5-star Google reviews from real customers
- 1-888-383-2439, Mon to Fri, 9 AM to 6 PM EST
How This Page Was Written
Written and reviewed by the FirstChoice parts team, using the same checks we run every business day when we match engine computers to a VIN.
Repair and fitment notes are general guidance. Ask a qualified mechanic to confirm the diagnosis and the exact part before you order.
Last reviewed:
Related Electrical and Engine Parts
Ready to Find Your Replacement ECM?
Share your year, make and model, have your VIN and the part number from your old module ready for the best match, and get a free quote with your warranty term and shipping details.
- Free quote, no obligation
- Photos before it ships
- 30-day parts warranty
Mon to Fri, 9 AM to 6 PM EST. Outside business hours? Send your request anytime and we will get back to you as soon as possible.
