10 years ago I had a Saab 9-5 Aero with a faulty ABS unit, I sent it off to ECU repair and they sent it back saying it was unrepairable. When I rung they told me all they can do is resolder joints in the unit as they have no components to replace anything and would have charged £200.
From what I gather most of the time cracked solder is usually the problem.
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