Watch your speed sensors realtime and see if you get incorrect wheel speeds.
The abs module has a design flaw that will cause a break in the electric path from the connector to the mother board. Cheapabs.com charges $150 to refurbish your unit so no recoding needed.
If you can reset errors and it works a bit and quickly malfunctions with multiple errors like both front sensors no speed etc it's likely the module.
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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