The reservoir has a sight glass for filling it, and a level sensor for monitoring the level. I plan to put a warning light somewhere in the car. If I need to service it, I remove the front tire, and the lower flap on the inner wheelwell. Access should take a few minutes and once the flap is off it's easy to get to.
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I've owned my truck for 12 years and 190,000 miles an have never touched the brake system. Same with my Porsche (15 years, 35K miles) and they all work just fine.
The radiator overflow tank is similar and in about the same location on the passenger side of the car. It also has a sight glass for filling, and a level sensor. I just didn't want to clutter up the firewall with tanks or anything else.
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