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What are the side effects of replacing the MS43 DME ECM? What are the side effects of replacing the MS43 DME ECM?
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Old 03-05-2020, 04:36 PM
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What are the side effects of replacing the MS43 DME ECM?
My 2006 X5 is a Canadian vehicle that we imported to the US.

I reprogrammed the ECU to switch everything to Miles/Fahrenheit, as well as enabling some conveniences like auto-lock door locks when driving.

I have a persistent O2 sensor error, and while I'm hoping it's a wiring problem, I know it could potentially indicate a problem with the MS43 DME ECM.

If I grab a used one off eBay, can I just plug it in and everything is the way it was? Or do I lose some of the programming I did? Or does the replacement need to be somehow matched to the vehicle?

Thanks!
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2006 BMW X5, 3.0i - 161,000 miles
2003 Ford Mustang GT - because having Two cars that keep dying seemed more exciting.
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