Mystery test plug

[silver-S]

I was cleaning out the map pocket in the passenger door and found this in the bottom. It's clearly some sort of test plug, as it has loopback wires. But beyond that, I have no idea where it came from, how long it's been there or what it is.

The part number on it is BMW 1378121. It's 1.5 inches wide by 1.25 inches long.

Anyone have good guesses or even identification?

[steved0x]

When I put a daylight running module on my son's first Miata I had to remove a plug that was very similar to that one. Maybe it is a similar type thing?

[ルーカス]

Sort of looks like WTB connectors out of a BMW, from what I know they're used for heated seats. I'm confident that it's nothing out of the Porsche! Just my two cents !