i also thought i needed a new alternator last year - battery would die if i didn't start it every week - needle would bounce around at speed - i replaced the voltage regulator - once with a cheap one (around $30) i found online somewhere - didn't help - then i got the better one (around $70) - it seems to have fixed my problem - this is the first winter i haven't had to put a charger on it in many years - and my battery is old - might that be your problem? - seems like you are not sure you actually need a new alternator
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84 928 S - SOLD
2012 Cayenne S
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