Voltage Regulator
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CARQUEST by BWD Voltage Regulator

Part No. R400P Warranty Details  

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CARQUEST by BWD is an aftermarket leader, providing a premium line of engine management products. BWD manufactures and distributes high technology critical components for late model domestic and import vehicles. BWD is constantly evolving to give customers the competitive edge they need to compete in today’s ever-changing marketplace.

Product Features:
  • All products are tested and inspected in an ISO 9000-compliant environment
  • State-of-the-art designs that meet or exceed OE specifications
  • Top-of-the-line quality and performance
  • With industry leading expertise, when original equipment fails our products are designed to fix the inherent failure issues
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REVIEW SNAPSHOT®

by PowerReviews
CARQUEST by BWDVoltage Regulator
 
4.9

(based on 10 reviews)

Ratings Distribution

  • 5 Stars

     

    (9)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to use (9)
  • Lightweight (3)

Cons

No Cons

Best Uses

  • Trucks (6)
  • Large cars (5)
  • Small cars (4)
    • Reviewer Profile:
    • Auto enthusiast (5), Mechanic (3)
    • Was this a gift?:
    • No (9)

Reviewed by 10 customers

Displaying reviews 1-10

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5.0

good product

By 

from Cumberland, MD

About Me Auto Enthusiast

Verified Buyer

Pros

  • Easy To Use

Cons

    Best Uses

    • Large Cars

    Comments about CARQUEST by BWD Voltage Regulator:

    This was a perfect fir for my 65 mustang and was very easy to install.

    • Was this a gift?:
    • No

    Comment on this reviewHelp Icon(earn points)

    (3 of 8 customers found this review helpful)

     
    5.0

    BWD voltage regulator

    By 

    from St Charles, MO

    About Me Auto Enthusiast

    Verified Buyer
    3 or more reviews submitted

    Pros

    • Easy To Use

    Cons

      Best Uses

      • Large Cars
      • Small Cars
      • Trucks

      Comments about CARQUEST by BWD Voltage Regulator:

      Compact and easy to install.

      • Was this a gift?:
      • No

      Comment on this reviewHelp Icon(earn points)

      (8 of 14 customers found this review helpful)

       
      5.0

      Works Great

      By 

      from Rocky Point NC

      About Me Auto Enthusiast

      Pros

      • Easy To Use

      Cons

        Best Uses

        • Trucks

        Comments about CARQUEST by BWD Voltage Regulator:

        Works Great, Nice Price

        • Was this a gift?:
        • No

        Comment on this reviewHelp Icon(earn points)

        (4 of 13 customers found this review helpful)

         
        5.0

        worked well 1990 Merc Sable 3.0

        By 

        from State College, PA

        About Me Casual Driver

        Verified Buyer
        Level 2

        Pros

        • Easy To Use

        Cons

          Best Uses

            Comments about CARQUEST by BWD Voltage Regulator:

            Cleared up the problem. I had the original regulator from 1990 and was getting varying voltage and on / off charging.. seemed hesitant to start charging then kicked in at higher RPM's. The system was floating around about 12 to 14 volts varying with speed. My car now starts right up and shows immediate charging around 14 V and holds 1.5 to 13 running.. one day in so far

            • Was this a gift?:
            • No

            Comment on this reviewHelp Icon(earn points)

            (15 of 31 customers found this review helpful)

             
            5.0

            Just what the doctor ordered.......

            By 

            from Asheville, NC

            About Me Truck Enthusiast

            Verified Buyer
            Level 2

            Pros

            • Easy To Use
            • Exact fit
            • Lightweight

            Cons

              Best Uses

              • Large Truck

              Comments about CARQUEST by BWD Voltage Regulator:

              The battery light on my 1990 F Super Duty was on. After having the alternator checked I replaced the voltage regulator, problem solved. Took all of about 10 mins to replace, 2 bolts, 1 plug.

              • Was this a gift?:
              • No

              Comment on this reviewHelp Icon(earn points)

              (24 of 46 customers found this review helpful)

               
              4.0

              decent regulator

              By 

              from michigan

              About Me Mechanic

              Ask me a question

              Verified Buyer
              Level 3

              Pros

              • Easy To Use

              Cons

              • Flimsy

              Best Uses

              • Large Cars
              • Small Cars
              • Trucks

              Comments about CARQUEST by BWD Voltage Regulator:

              a nice replacement for the ford unit that always craps out. seems a little chintzy and light compared to the stock one but time will tell how it holds up.

              • Was this a gift?:
              • No

              Comment on this reviewHelp Icon(earn points)

              (23 of 40 customers found this review helpful)

               
              5.0

              Exact fit and good performance

              By 

              from Green Bay, WI

              About Me Mechanic

              Verified Buyer
              Level 2

              Pros

              • Durable
              • Easy To Use
              • High-Performance

              Cons

                Best Uses

                • Trucks

                Comments about CARQUEST by BWD Voltage Regulator:

                This regulator is used on a plow truck to maintain a 1350 amp battery and with solid state upgrade it charges consistanly. It takes alot of abuse and still works great. Exact mount and plugged right in!

                • Was this a gift?:
                • No

                Comment on this reviewHelp Icon(earn points)

                (18 of 38 customers found this review helpful)

                 
                5.0

                New replacement regulator

                By 

                from Minneapolis, Minnesota

                About Me Auto Enthusiast

                Verified Buyer
                Level 3

                Pros

                • Easy To Use
                • Lightweight

                Cons

                  Best Uses

                  • Large Cars
                  • Small Cars
                  • Trucks

                  Comments about CARQUEST by BWD Voltage Regulator:

                  Direct replacement voltage regulator. Fit perfectly, bolted into place and plugged in. Worked flawless.

                  • Was this a gift?:
                  • No

                  Comment on this reviewHelp Icon(earn points)

                  (22 of 40 customers found this review helpful)

                   
                  5.0

                  Alternator light staying on.

                  By 

                  from Aurora,Co

                  About Me Auto Enthusiast, Mechanic

                  Ask me a question

                  Verified Buyer
                  3 or more reviews submitted

                  Comments about CARQUEST by BWD Voltage Regulator:

                  Even though my charging voltage was 13.8 volts,my alternator light would stay on.I replaced the voltage regulator,the light went off and my charging voltage is 14.2 volts!

                  • Was this a gift?:
                  • No

                  Comment on this reviewHelp Icon(earn points)

                  (22 of 44 customers found this review helpful)

                   
                  5.0

                  BWD VOLTAGE REGULATOR

                  Profile Image

                  By 

                  from near charlotte, nc

                  Verified Buyer
                  Level 4

                  Pros

                  • Durable
                  • Easy To Use
                  • High-Performance
                  • Lightweight
                  • Versatile

                  Cons

                    Best Uses

                    • Large Cars
                    • Small Cars
                    • Trucks

                    Comments about CARQUEST by BWD Voltage Regulator:

                    I REPLACED THE OLD VOLTAGE REGULATOR WITH THIS ONE AND CHARGING SYSTEM WORKED FINE. TAKES ABOUT 5 MIN. TO CHANGE. HAVE DRIVEN THE TRUCK SEVERAL TIMES SINCE, STILL WORKING. ADVANCE DISCOUNTS AND LIFETIME WARRANTIES CAN'T BE BEAT!

                    • Car & Truck:
                    • Auto Enthusiast

                    Comment on this reviewHelp Icon(earn points)

                    Displaying reviews 1-10

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                    Do you have questions about this product?(earn points for answers!)

                     

                    Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

                    15 Questions | 17 Answers
                    Displaying questions 1-10Previous | Next »
                    • Q:

                      Is this comparable with Fords P/N D4TZ-10316-A? For a 1969 Thunderbird with heated rear window
                      Asked on 9/13/2016 by Mike from Oklahoma

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Hi Mike, glad to assist you! This CARQUEST by BWD Voltage Regulator (Part No. R400P) is an exact fit for your 1969 Ford Thunderbird. However, this is not a cross reference for the Ford part number D4TZ-10316-A.

                        Answered on 9/14/2016 by Steve from AAP
                    • Q:

                      old one has a condensor do i need that?
                      Asked on 9/4/2016 by red from new castle pa

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Hi Red, I'm glad to assist you! It is for radio noise suppression. You can re-use the old one. It is not needed for the regulator to operate.

                        Answered on 9/6/2016 by Solomon from AAP
                    • Q:

                      I have a 62 vw beetle, it had been converted to a 12volt system. My battery is showing a 16v charge with the engine off. Will this regulator fit my modified VW and is it a 12v?
                      Asked on 9/25/2015 by josh from Adairsville, ga

                      2 answers

                      • CUSTOMER CARE

                        A:

                        Hi Josh! Happy to help you with your question! Because your VW has been modified this voltage regulator would likely need to be modified as well. It is rated at 12Volts with a female connector and male terminals with 4 blade terminals. When dealing with electrical components be sure to exercise EXTREME care.

                        Answered on 9/26/2015 by Panda from AAP
                      • CUSTOMER CARE

                        A:

                        Hi Josh! Happy to help you with your question! Because your VW has been modified this voltage regulator would likely need to be modified as well. It is rated at 12Volts with a female connector and male terminals with 4 blade terminals. When dealing with electrical components be sure to exercise EXTREME care.

                        Answered on 9/26/2015 by Panda from AAP
                    • Q:

                      89 F150 with 4.9 L6. Voltage while running is 14.6V on batery terminal. Stays same on idle at 750 through 1500RPM.
                      Is this normal or will it kill my new battery?
                      Thanks!
                      Asked on 3/14/2015 by Igor

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Hi Igor, it's sounds normal! A typical specification for this system is approximately 2 volts above the battery "base voltage" at key on, engine off. For an exact specification, see the your vehicle service manual.

                        Answered on 3/16/2015 by Solomon
                    • Q:

                      where is volt regulator located on a 68 f-350 2/w dr? is it in the alternator
                      Asked on 9/1/2014 by gonebiking from sussex NJ

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Hi Gonebiking, For help with your project, I recommend purchasing a Haynes or Chilton repair manual specifically for your vehicle. This should be able to assist you further into detail on how to repair or replace specific parts.

                        Answered on 9/2/2014 by Steve from AAP
                    • Q:

                      on a 1988 ford bronco where is the voltage reg. located at ?
                      Asked on 11/13/2013 by John

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Hi John, great question! The voltage regulator on your Ford Bronco would be located inside the alternator.

                        Answered on 11/13/2013 by Vincent from AAP
                    • Q:

                      If a voltage regulator is bad on a vehicle, will it cause it to overcharge a battery, and cause the battery to explode?
                      Asked on 2/25/2013 by Kimmyco from Kentucky

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Symptoms of a bad voltage regulator: Dimming or Pulsing Lights :A damaged or failed voltage regulator can rapidly diminish the alternator's ability to cycle power from the battery. This may cause the vehicle to experience dimming or pulsating external systems, such as headlights and dashboard elements. In addition, the "check engine" or "battery" light may appear on the dashboard when the initial failure is detected by the vehicle's on-board computer. Dead Battery: A burned-out voltage regulator will diminish the vehicle battery's ability to charge or stop it altogether. You will quickly find the vehicle unable to start due to a dead battery. If the battery is recharged, the vehicle will start, although the faulty voltage regulator will only cause the battery to lose power rapidly. In this case, the vehicle should immediately be taken to a mechanic once the battery has been recharged or the car has been jump-started to have the voltage regulator replaced. Unpredictable Engine Performance: Some aftermarket voltage regulators have experienced problems working in factory-built systems. Engine stalling, sputtering and intermittent acceleration will occur when the vehicle's voltage regulator is unable to handle the power put out by the vehicle's stock (and faster-moving) alternator. This causes the regulator to burn out quickly because it was overworked. Have either a certified mechanic or someone with extensive knowledge of the vehicle being modified look at the aftermarket parts. For any further assistance, please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

                        Answered on 2/25/2013 by Steve from AAP
                    • Q:

                      ON A 1987 FORD F150 IT IS SQUEEKING AND THE VOLTAGE DOES NOT STAY HIGH AND THE LIGHTS ARE VERY DIM DO I NEED A BELT OR REGULATOR OR BOTH
                      Asked on 5/19/2012 by Anonymous

                      1 answer

                      • CUSTOMER CARE

                        A:

                        The voltage regulator should be the possible cause of the problem. However, I would suggest taking your vehicle to a certified mechanic for a proper diagnosis before buying and having parts installed that may not (solve/be) the problem.

                        Answered on 5/19/2012 by Vincent from AAP
                    • Q:

                      this vehicle is a late 1988/1989 model,do all parts interchange?
                      where is the voltage located?
                      Asked on 12/23/2011 by al from nashua,n.n.

                      1 answer

                      • CUSTOMER CARE

                        A:

                        For assisting you further on the location of voltage regulator on your vehicle, please provide the year, make, model and engine size of the vehicle.

                        Answered on 12/23/2011 by Vincent from AAP
                    • Q:

                      where is the voltage regulator located on a 1977 ford f150?
                      Asked on 11/3/2011 by junk box king from forked river, nj

                      1 answer

                      • CUSTOMER CARE

                        A:

                        The voltage regulator in your f150 should be a silver box 3 to 4 inches square with a wide flat plug either bolted to the firewall or one of the fenders.

                        Answered on 11/3/2011 by Vincent from AAP
                    Displaying questions 1-10Previous | Next »

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