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2 pointsYou should not have to - unless you hooked up the new battery backwards. If the polarity was hooked up correctly then you need to start looking for poor grounds. Starting with the battery cable then chassis grounds.
1 point14Nm or 10.5 ft lbs.
1 pointThese cars (specifically Cayenne) seem very sensitive to weak a battery and poor grounds. Whenever I see multiple electrical issues on a Cayenne - that is where I start.