Have doubts about rebuilding your alternator?


Not sure if your alternator is bad?


Check out some important tips from the PROS!!!


At rebuilderinabox, NOTHING is more important than quality assurance. For decades, we have dedicated ourselves to the the acquisition of superior quality starter and alternator components. And this is no easy task, as a result of our years of rebuilding experience, we have conquered the true significance of reliability and longevity. We will warranty all of our parts for the period of 1 year. But this is not an issue. If you follow our program, you will NOT have a warranty. You will NOT have to worry about it.

SKU: 4GWB Categories: , ,



The 4G white with blue voltage regulator kit is used in many of Ford’s late model applications. The on board computer controls the output voltage of the regulator. Sometimes the decision is made for short periods of abnormally low voltage (12.5-13.5VDC). This would be considered normal.  Unfortunately, many 4GWB’s are mounted in a labor intensive location. When you put a 4GWB kit on your vehicle, you should never allow a battery over 4 years of age to be used in the system. As the battery goes through a failure period, you may never know by starter draw abnormality. However, the computer controlled voltage regulator will suffer drastically depreciated life expectancy as a battery goes bad.

You know you have a 4G by the black metal cover on the back of the alternator as shown in pics 2 and 3.

Kit includes : High quality voltage regulator, new rotor, DE bearing, rear bearing with tolerance rings. 

Vehicle Fits

Make Model Engine Begin year End Year
FORD ESCAPE 2.3L L4 2005 2007
FORD ESCAPE 3.0L V6 2006 2005
FORD FIVE HUNDRED 3.0L V6 2005 2007
FORD FOCUS 2.0L L4 2005 2006
FORD FOCUS 2.3L L4 2005 2007
FORD FREESTYLE 3.0L V6 2005 2007
FORD TAURUS 3.0L V6 DOHC 2002 2005
MERCURY MARINER 2.3L V8 2005 2007
MERCURY MARINER 3.0L V6 2005 2006
MERCURY MARQUIS 4.6L V8 2003 2006
MERCURY MONTEGO 3.0L V6 2005 2007
MERCURY SABLE 3.0L V6 2002 2005

help & warranty

The parent company : Performance Starter & Alternator, Inc. has been in business since 1985.  “Help” is what we’re all about. You don’t have to have any concerns whatsoever that your rebuild may not succeed. If you need help or have a question, e mail us. If you can’t understand the email, call us or leave a voice mail with your name and number. An actual starter alternator rebuilder will call you back.

If you STILL can’t get your rebuild to work, put it in a box and send it to us with your email, phone number and return adress. We will diagnose the problem for you, free of charge. Then, we will will contact you, and tell you what the problem is. At this point, you can make a choice of the following
1. We can fix the problem for you, test the unit to insure operation according to manufacturer’s spec’s, then send it back to you for a nominal fee. Of course, this price will be discussed before we do anything. And if if it’s something minor, we’ll probably fix it for free labor.
2. We can send it back to you, as is, for only the shipping charges, and you can have the satisfaction of  doing the job right for yourself.
3. You can choose to bail and ask for a refund for the cost of the parts.
                                                                               PLEASE BE ADVISED
We at Rebuilder in a Box are accustomed to happy customers. Your successful rebuild  is our success. All through the one year period of beta testing and interviews we maintained a 100% success rate and we have full intentions of maintaining that goal. So if you tend to be a little nervous…you don’t have to be. Our movies are so up close and thorough, our biggest criticizm is that we did “Too good of a job”.


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.