Join Date: Sep 2009
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I had the exact same problem when trying to fit my sub to a 99 megane, I couldn't locate any sort of grommit.
In the end I had to drill a hole through from behind the dashboard. If you remove the dash and remove the speedo facia (you can't actually remove it, just move it to one side) they should be a flat grey plate behind it.
If I remember correctly you'll have to drill through this and it'll bring you out right behind the battery in the engine compartment. Good luck!
(Ironically, I just signed up to these forums to see if anyone can tell me where the grommit is for an 03 Laguna as Im getting one next week and want to transfer my sub to it. Maybe I need to find a new place to drill!)