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Discussion Starter · #1 ·
cut a port in my rear deck because of the fumes from the lead-acid battery in my trunk. I brought up the ski pass through, and the guy said that maybe those that had this were running gel type batterys. Any input would be appreciated.
 

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Discussion Starter · #3 ·
BMW has a breather hose attached to each battery at the bottom edge that exits out of the car.
Thanks Ron. I spoke with you on the phone friday about the Alumapro sub. I appreciate the help. Maybe you can help me on another issue. I am looking to putting a port from my trunk to my cabin and I saw a DIY where a guy cut out an existing perforated templat for the ski pass thru on a car that did not have this option. Do all BMWs have this pre-existing spot in the metal for a cut out. I seems like it would be a good place to do this. Here is the DIY link.
A/D/S upgrades
 
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