The part nobody explainsWhere to buy a donor ECM
A donor is a working engine computer that carries the same part number as yours. We copy your data onto it and it becomes your computer. Finding one is the step that stops most people — so here is where to look, what to check before you pay, and what to do when the search comes up empty.
Don’t want to hunt for one? We source it for you at $299, module included.
Three ways to get one
Your options, honestly ranked
All three end with a working module in your hands. They differ in how long it takes, how much can go wrong, and who carries the risk if the donor turns out to be dead.
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Salvage yard
Call yards near you with your part number. Some will pull it and let you inspect it. Prices are the lowest you will find.
- Time
- Hours to weeks, depending on luck
- Risk
- Usually sold as-is, no testing
- Watch
- Water damage and corroded pins
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Online marketplaces
Search the part number itself, not the year and model. Sellers who list the number usually know what they are selling.
- Time
- Days, plus shipping
- Risk
- Returns exist, but cost you time
- Watch
- Photos that never show the label
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We find it
Ship only your original. We source the part-number-matched donor, clone it and send both units back. For common families we usually have one in 2 to 5 days.
- Time
- 2 to 5 days for common families
- Risk
- Ours. Covered 6 months
- Price
- $299, module included
The one rule
The part number has to match
Not the year. Not the model. Not “the one the parts site says supersedes it.” The number on the label.
The trailing letters usually mark the software level, and those can differ, because the software is what we replace. Everything before them identifies the hardware, and that has to be identical.
A donor built close in date to yours is better than one years apart, even with a matching number. Hardware revisions happen quietly inside the same part number.
Automatic and manual are not the same
The same vehicle in the same year uses different computers depending on transmission. This catches people out constantly, and it is one more reason the model name is not enough.
Not sure where your part number is? Here is how to find it →
Same original: 68153864AH
68153864AK
Works
68153868AH
Will not work
- Different letters are fine. AK instead of AH is a different software level, and software is what we replace.
- One different digit is not. 68153868 is different hardware, no matter how close it looks.
Before you pay
What to check on a used module
You are buying hardware, not software. The things that make a donor useless are almost all physical, and almost all visible in a photo if you ask for the right one.
Ask the seller for
- A clear photo of the label, whole and readable
- A photo of the connector pins, straight on
- Whether the vehicle it came from was running
- Their return policy in writing
Walk away from
- Water lines, silt or rust inside the connector
- Bent, green or missing pins
- A cracked case or a bulged seam
- A listing that will not show the label
Send us the seller’s photos before you buy. We will tell you whether that module is worth your money — no charge, no obligation.
Call (404) 666-8211While you are hunting
Questions people ask us
Does the donor have to be from the same year?
The part number matters more than the year. A donor close in date is better, because hardware revisions happen quietly within one part number, but the number itself is the requirement.
Does the donor need to be from a running car?
It helps, because it tells you the module itself worked recently. But we bench-verify on a simulator before anything ships, so you find out here rather than in your driveway.
Can I use a remanufactured or already-programmed module?
Usually yes, as long as the part number matches. We overwrite whatever is on it with your data, so what it was programmed to before does not matter.
How long should I look before giving up?
If a week of calling yards and searching listings turns up nothing, the part is probably scarce enough that our sourcing is cheaper than your time. That is what the $299 path is for.
What if I buy one and it turns out to be dead?
We tell you before we charge you for cloning, and we go over the options. A donor you supplied yourself is not covered by our warranty, since we cannot vouch for where it came from — modules we source are covered for 6 months.
Or skip the hunt
Let us find it.
Ship only your original. We source the part-number-matched donor, clone your data onto it and send both units back. $299, module included, covered 6 months.