How much does it cost to fix a voltage regulator?

Between $345 and $386 is the average cost for a voltage regulator replacement. Labor costs are between $155 and $196 and parts are priced at $190.

Can you replace just the voltage regulator?

If it registers battery voltage only, the fault is in the alternator or its wiring, or in a field isolating relay if fitted. If it registers an excessive charge (15 volts or more) the regulator is faulty and you should replace it.

How long do voltage regulators last?

For the most part, the instrument voltage regulator is supposed to last for the life of the car. Like with any other electrical component of a car, eventually this voltage regulator will begin to show signs of damage.