Those are the relay flyback diodes, the data sheet on the G5LE-1-E relays state around about 33.3mA current is present in the continuous draw to hold the relay on.
As long as the replacement diode can handle that (when it releases the current flows away through the diode to save having a voltage spike) it should be fine.
I think I'll be swapping mine out while it is still working I'll do the same for all the relay diodes.
Cheers for the info.
Mark - driving
Archie the Old English Sheep Mog...........
2010 Roadster 3.0 V6 (S3)