BMW dealer said found small oil leak that could short DME--Want $1500 to fix.

Hello, That is entirely possible. Oil leaks commonly occur at sensors or other wired components that contact oil, and the oil can wick up the wires into the DME (ECM/PCM) or other control module. once oil infiltrates the wiring connector at the DME or sensor, it can cause shorts to ground and faults for the DME 1500 to replace and reprogram a DME as well as repair an oil leak is reasonable, but you could and should have it done at an independent authorized BMW service center to save costs. Sometimes dramatically. .