Abs control unit V70

HALLO nice community, I saw for the first time the Abs lamp light on my V70 Bj 98 2 liters. At the next Strart it went out again I read in the forum that it is mostly the Abs control unit which has error, soldering points which are broken. My questions: Where can I have the control unit repaired if necessary (experiences from your repair shops) What does such a device can be developed well or ? Maybe a link to it ? Or do I not have to worry yet make light for the first time ? Thanks again for your help.