U.S. Toll-Free Call Center   Hours
888-844-3393
Espanol: 866-401-3393


Highest Ratings

Quality: We've got the awards to prove it!

We've won the Bizrate Circle of Excellence award,
7 years in a row. Rated outstanding for quality, satisfaction, service, and on time delivery. 1A Auto selects the highest quality parts from the best manufacturers. Check our excellent ratings.
Fastest Shipping
No-Hassle Returns
USA Support Techs
Best Value
Our Guarantee

Customer Feedback


I bought a set of door weather...
Chevrolet Camaro IROC-Z
Kyle, Royal Oaks, MI



Home > Mercury > Voltage Regulator

Mercury Voltage Regulator

Bizrate Circle of Excellence Platinum - See 1A Auto Reviews at Bizrate.com
Choose Your Mercury Model


Voltage Regulator

Mercury Voltage Regulator

The voltage regulator controls the amount of voltage being output by the alternator based on the vehicles demand on the electrical system. While typically built into the alternator on newer cars, this was not always the case. When the voltage fails, it can result in an output that is too low to charge the battery or too high to safely run the electrical system.

At 1A Auto, we make shopping for a replacement automotive voltage regulator for your car, truck, SUV, or van easy - we're here to help you select the right part for your vehicle! Call our customer service toll free at 888-844-3393 if you have any questions about our aftermarket voltage regulators, warranty, compatibility or to purchase, or you can buy online.


Welcome to 1A Auto....
For more than 50 years, the Green family has been installing and using the same high quality auto parts that you'll find on our website. We actually use the parts we sell, and we've been selling online since 1999. Our company's mission is to make your car projects go smoothly, and to become your trusted source for auto parts. To this end, we treat our customers like family.

We employ USA based, knowledgeable support technicians. They'll help you through your project. We always make sure you get the right part. And we boast the industry's most generous returns policy. You won't find a company more passionate about auto parts than 1A Auto.
See 1A Auto on Facebook Watch our auto parts installation videos on Youtube Nutts and Bolts Blog Google Plus
Free Shipping