• 12 volt to 6 volt  Gauge Reducer - SGR1
  • 12 volt to 6 volt  Gauge Reducer - SGR1
  • 12 volt to 6 volt  Gauge Reducer - SGR1
  • 12 volt to 6 volt  Gauge Reducer - SGR1
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12 volt to 6 volt Gauge Reducer - SGR1

Vintage Auto Garage
(18 reviews) Write a Review

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Product Description 12 volt to 6 volt Gauge Reducer - SGR1

12 volt to 6 volt Single Oil, Gas, Temp Gauge Reducer:

This reducer gives you an easy way to convert original 6 volt gauges to 12 volts negative ground after you have upgraded your car. It works with negative 12 volt systems only to reduce the voltage Without a reducer, the higher power of 12 volts could burn out or do other permanent damage to sensitive 6 volt gauges in your vehicle. The reducer works as a:

  • Oil Gauge Volt Reducer
  • Temperature Gauge Volt Reducer
  • Gas Gauge Volt Reducer

Each reducer provides conversion for one 6 volt gauge and each gauge in your car will need its own. The reducer is not suitable for converting radios, fans, heaters, or other elements to 12 volt power and should only be used for gauges.

Our Gauge Reducer for vintage cars is high quality with brass screw terminals to prevent corrosion and an internal heat sink to help keep the reducer cool. Dont trust your valuable gauges to reducers made off-shore like many of the reducers found on-line. 


Made in USA By Vintage Auto Garage Don't trust your valuable gauges to cheap imitation reducers

Overall Length:


Overall Width:


Overall Height:



4 amps


Use with gauges only not heater fans or radios.

MFG. Part #:



Transistorized 12v to 6v reducers allow you to use your original 6 volt Oil, Gas or Temperature gauges on a vehicle that has been converted to 12 volts. You will need one reducer for each 6 volt electric gauge on your vehicle.

Note: Do not use ceramic block style resistors/reducers for gauges, Resistors heat up and cause the gauge reading to be in correct, you may think your ending is running hotter or cooler or your gas is fuller than you think.


Questions about the 12 volt to 6 volt Gauge Reducer - SGR1?

Vintage Auto Garage is here to help you with all of your classic car auto parts. If you need help finding the products you need to complete the restoration or repair of your vintage American car or truck, our team can walk you through the parts that you need, help you install them, and more. Give us a call during normal business hours and one of our team members will be able to provide you with personalized assistance.

Warranty Information

Vintage Auto Garage LLC offers a one year [12 months] limited warranty on products sold to the original owner. The limited warranty applies to items sold to be free from defects in material and workmanship. Vintage Auto Garage LLC is not responsible for any consequential damages caused by items sold or installed. This warranty covers the replacement/repair of the product only and does not cover the cost of removal and installation. Light bulbs are not covered under any warranty, if your order arrives with damaged bulbs caused by shipping, Vintage Auto Garage LLC will replace the light bulb at no charge. There is no warranty on parts that have been modified, painted, altered or not correctly installed. Some parts carry a longer manufacture limited warranty, in this case Vintage Auto Garage LLC will cover the first year [12 months] warranty and the manufacture would cover the remaining warranty period. Battery cables manufactured by Vintage Auto Garage LLC have a lifetime limited warranty to the original buyer. Extended warranty coverage can be purchased separately for some products that would extend the normal warranty by [12 months], [24 months] or [36 months]. Contact us if you would like more information on extended warranty or add to cart when making your purchase.

Product Reviews

Write a Review

18 Reviews

  • 5

    Posted by Ron on Mar 12th 2024

    It was exactly what I needed.

  • 5

    Posted by Guy Monroe on May 12th 2023

    This little puppy works like a charm on the fuel gauge. I’m ordering two more for the oil pressure and the water temperature.

  • 5
    12 to 6 volt reducer for gauges

    Posted by Cody on Dec 14th 2021

    Worked exactly as advertised

  • 5
    Volt reducer in T -Bird

    Posted by larry claypool on Nov 21st 2021

    used this on '55 T-bird gas gauge that was converted to 12V. by somebody else. customer stated gas gauge never worked afterward. i added the volt reducer and now readings are accurate. on this install i wrapped the reducer with shrink wrap to make sure the power in screw did not contact the surrounding metal dash cluster.

  • 5
    best ever for reducing 12 volt to 6 volt guages

    Posted by robert F on Aug 19th 2021

    I have bought many of the old runtz reducers on-line and find they fail. now i only use this reducer from these guys at vintage for my hard to find 6 volt guage when i convert to 12 volts,

  • 5
    Excellent part

    Posted by Alan Schmitt on Jun 3rd 2021

    Good company to do business with

  • 5
    Excellent product

    Posted by Garrett Warren on May 25th 2021

    Worked perfectly. Just what I needed for my fuel gauge. Made in USA!

  • 5
    made in USA incredible

    Posted by Van on May 6th 2021

    Wow, ordered came much faster than i thought it would, was not sure if much different than the old runtz reducers, but way nicer made with dual circuit board guessing better cooling and awesome instructions, USA, USA!

  • 5
    Oil, gas, temp

    Posted by Nathaniel Guary on May 6th 2021

    Perfect fit