Thanks AWR, I tried soldering this time, and just laid a pretty good bead right where the bulb socket contacts the metal plate. I'll see how long that lasts. This last time it melted a bit of the metal plate (must have arced) and so I don't know if it will last. Looks like Pelican has the "ULO" brand replacements (OEM but not original BMW) for only $150, or the original BMW is about $200/ea, which isn't really that bad. They come with new gaskets too, and mine are definitely leaking on both sides. (I live in the desert which is the only reason I don't have water sloshing around in my quarter panels, that's how bad they are)

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2003 3.0 5MT Topasblau
Purchased in 2016 and sold in 2024
2012 35d Platingrau