Thread: Chipbox for M5
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      01-18-2013, 06:24 PM   #7
ImpetuousRacer
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Drives: 2013 BMW M5
Join Date: Oct 2012
Location: Scottsdale, AZ

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May be dumb question. Buy new OEM ECU, tune it, replace your OEM with it. Warranty time, swap ECU?
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