'84-'89 Porsche 911 has a DME relay that looks nearly identical. It controls power to the engine computer and also fuel pump. It also suffers from cracked solder joints, and car stops stone dead when it fails.

A common problem, and reflowing the solder joints makes for a permanent fix. No need to purchase a new one if you've repaired the broken joints. Although keeping a spare in a glove box is always a good idea.

__________________
'98 E300 turbodiesel