[] Dont listen to him man if you dont disconnect your battery you will just have to check your blinker fluid. Not disconnecting your battery can cause the blinker fluid to build up and clog your blinkers along with making the fluid leak all over the front of yoru car.[xx(] some nasty shit!
HAHA no man if you dont nothin bad happens the ecu might just not pick up the new item and adjust the car to it. And if your doing electrical well you might end up with a few blown fuses...
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