It's usually a big metal box. I don't think the Toyota Casa will repair it. Mga a/c compressor at power steering pumps pa lang, ayaw na katayin, ECU pa kaya? It can be repaired if you are patient enough to 'read' the flow of conductors and other components. Baka nga may napatid or nasunog lang. Madali naman makita ang sunog. The surrounding area will usually be blackened.

Sa Club Mitsu dati parang may nag-rerepair ng ECU. Unfortunately I did not pay attention as my vehicle does not have an ECU.

Just make sure na ECU nga ang sira.