Reviews of Bosch voltage regulator

I had this happen on my alternator recently. Was in the shop for 2 months trying to figure out the issue. Bosch alternator. Original voltage regulator had gone bad. Loss of charge after initial load.

The best voltage regulator is the Bosch solid state:

https://www2.cip1.com/bos-30019/

In my personal experience new built generators, including Bosch, are of very low quality. I haven’t had one make it past a year.

Make sure to use the Bosch part, not a cheap alternative, bad voltage regulators will ruin perfectly good batteries.

Did some digging and noticed that there is a crack on the voltage regulator on the back of the alternator - which is the original alternator that came from the factory in 1992. The fluctuation is not massive on the volt gauge. However, I have noticed that the volt meter does not read as high as I am used to. It's in the green - probably 13v. My previous car was always closer to 14. Also, even though the car starts on the first crank, you have to blip the throttle to get the alt light to turn off. I am thinking this fluctuation - even if it is just slight - could be a foundational gremlin to a plethora of potential CIS issues. Thoughts?

Installed a new Bosch voltage regulator (VR) on the fire wall and had the following problem: the 61 terminal does not have ground so the warning lite does not go on. Also there is battery voltage at the D+ terminal and causing the generator to get hot. I just installed another new VR and have the same problem.

I ordered a replacement Bosch regulator F-00M-A45-303 from ebay and while it was being shipped to me decided to pull the alternator out and take a look at its general condition.

i previously replaced the voltage regulator and it charges fine the commutator rings were in good condition and i cleaned and serviced the bearings the best i could soo... should i just give up and replace this with a new bosch 65 amp unit?

It's usually just the brushes. On a Bosch unit, under $25 gets you the voltage regulator with the brushes, and we're talking 2 screws and 5 minutes to swap it out...without even removing the alternator. If you want to replace the bearings, less than $20 gets you both bearings and takes about 15 minutes with the alternator off the car. Life expectancy? My 1.6 diesel alternator went dead at 1:00 a.m. about an hour north of Las Vegas. 289,000 miles at the time.

I charged the battery and started the car, then drove to Autozone where their tester said that the voltage regulator was bad. Installation took less than an hour. Once up and running everything worked well and I even took it back to Autozone and had it rechecked.

thanks this worked out great, i just did it and it couldn't have been easier. i was tired of the alt barely charging the battery. i know have 14.8 volts and with everything on its 14 instead of 13.2. no more reving the engine after start up to extinguish the light. thanks for the tip!:thumbup: