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- เผยแพร่เมื่อ 11 ม.ค. 2025
- Today i am showing you how i replaced the voltage regulator on my 2009 bmw 135i with the N54 engine. Very simple fix and can solve lots of electrical issues. Save money by replacing just the regulator instead of a new alternator.
I thought I was the the only one who rebuilt my alternators without removing them drom the car. I just by the brushes for $5 and replace them.
The voltage regulators nowadays hardly ever go out. The diodes go out first. But great job anyway, you just gave my trade secret away.
The problem is this is a BMW. My friends 2012 528i with 100K is outputting 17v! Never seen that in any other car.
What are the symptoms when the diodes go?
@@drew2540 alternators generate AC output not DC the diodes turn the AC into DC so when they go out you'll end up with straight AC coming out of the alternator the same kind of current as in a house. The regulator simply takes the DC voltage and reduces it from around 80 volts down to 14.6v
How do you replace the brushes and where do you buy them from ?
Yes how @@claudiochairez8995
No way it is THIS EASY! Thank you so much for this!!
Cheap fix thanks, solved my voltage stability issue.
True that , some cars have a valeo 180 amp , and that has its own specific voltage regulator
Hello sir. First off ty for the video. Was helpful. Definitely replacing. Could the alt issue have anything to do w the water pump e2-85? I heard a few videos talking about how alt an wp are on some of the same circuits.
The beginning had me in tears 😂 (explosion) part
Nice job! 2014 x3 charging acting up.. new battery but i think voltage regualtor is issue 152k miles so oroginal has worked
Iam so pissed i have 4a07 code and was searching for a solution. I start this video and when u dropped regulator i bursted out laughing.
😂 good to know. Thanks 🙏
good afternoon BMW E70 35dx 2011 at first the left headlight blinked and there was an error about the generator failure, replaced it with a new one and after 2 weeks there were 5 errors on the left headlight and 2 errors 4A67 Power Management Vehicle Electrical System and BMW 4660 Power supply unit, after these errors the car through it stops for a while and to start you have to remove the key and insert it again, the error appears mainly on the road or when I stand for a long time at low revs, I check if everything is in order, the alternator gives 14.8 volts, but the errors say that gives 17 volts, where to look and what can be
Mine e90 328xi just stepped over 210k km and this part went out, seems like a lower brush gives up faster than the top one. So if you getting weird voltages like 11 -13v, it's most likely that the top brush trying to compensate for the lower one.. :/ after replacing battery i'm getting 14+v. I've noticed overcharging error and 15v coming from alternator, but not each time. So you have to track for couple of days or best is to use a secret menu and track voltage while driving :)
I have a 2010 328i xdrive hit 210k miles, now it’s almost 211k miles. Going strong 💪🏼
Hey great vid. ever have a smoking issue ? And can’t figure it out ? I have an 08 N54 .. thinkin turbos
Probably valve cover gasket leaking to turbos
My new battery keeps dying and now I have all these random lights/codes on my dash, idk if I should replace the regulator or the alternator
Yes, do
Is it important that regulator should be of exactly same part number?? Please reply
Hi by any chance would you get a P0625 code and or have engine power issues before this??
I have a bmw2006 325i could a bad one cause your distribution box and positive thermal to surge
My 2009 bmw 328xi has air intake duct blocking my hands to take off the black cover for accessibility need help 😭
What constitutes over charge? My alt is putting 14.5v to battery
Yes thats normal
Safe to just disconnect negative battery terminal before doing the work?
Yes
Absolutely I did this right before replacing my loud alternator
@@Raiugabe ended up doing mine a few weeks ago. The regulator wasn’t coming out without a fight so I ended up replacing the alternator. Pretty easy job as long as you have the tools
How many miles did that alternator have on it, for reference ?
Has 130k miles
@@menjicar I appreciate it, good to know
I have a 2008 bmw 335i e92 and I was wondering if this is going to fix my issue when I was driving my heater stopped working then the doors wouldn’t lock then after all that the trunk would not open the alarm and everything works the doors themselves do not lock tho I was thinking this would be my issue the door lock button and trunk button inside do not work so I have to use the key itself
Your issue is likely the FRM module (driver footwell module) starting to fail. It controls the windows, heating/cooling, interior/exterior lights and some more stuff. It is covered under a 15 year, 300k warranty/recall and is a known issue and is a free repair at the dealership. Give your local BMW dealership and see if you still make the cut since yours is a 2008. I just had this exact problem on my e91
Can this cause 4x4 light? Or abs brake lights?
Lots of electrical issues when voltage is not within specifications
What’s the function of the air filter on the valve cover ? Or is it just aesthetic
Can the voltage regulator cause no crank no start
No
How would you know what amp is your alternator????
I have no clue. But all I know is you can replace the voltage regulator that wears out
You open your hood and check if you have the Bosch or the Valeo alternator.
@@SDE90 it Bosch alternator
Did you have to disconnect the negative battery terminal too?
No
Im trying to figure out a sudden no crank no start on my 08 328i. Power thru out the cart but nothing when I press start. Anyone have any ideas code just read low voltage
I've never seen anyone replace such a part on an alternator. Can you please provide legitimate benefits for installing a baffled oil fill cap? For crank case pressue release?
You can google benefits of the the oil fil cap that’s baffled and it’s benefits or having a external catch can. Only necessary when raising boost
I changed my voltage regulator and than took my car to the car wash and than when I got back home I turned off the car and later on in the night when I tried to leave again my car started to throw every light and than the car just parked it self and turned off and also one headlight was very dim and I even changed the headlight but it was still dim anyone have any idea what is my problem
🔥🔥🔥
How do you determine the alternator amps? To buy the correct voltage regulator?
Can this be done on the bmw e92 335d? Surley it’s got to be the same set up? Looks different through
Probably can
Where you located
What’s the part number
Couldn’t you just disconnect the battery instead of chancing shorting something in the engine bay??
Good video but that explosion thing in the beginning is obnoxious hehe. Also, always good to state make, year and especially miles.
Explosion was a must. 2009 bmw 135i with 150k miles
@@menjicarThat shit was funny as hell
I have a 2011 528i BMW anyone know if mine is located in the same place?
Thank you
Everyone making TH-cam video’s about this Confusing everyone because this bosh part number is NOT compatible with a Valeo Brand Alternator Another OEM part that is made For BMW & not all 3 series are equipped with a bosh brand alternator!! SMH 🤦♂️
So tired of the clickbait...came here to see what issues it fixed, nothing mentioned
Hey. This being broken or worn down will cause your car to act crazy. Random lights, transmission malfunction, car “overheating”, 4x4 lights, etc..
@@j0siahwould I also get an abs and all the lights popping up
@@j0siahbecause I got a 5df4 and 5df7 which and my abs keep acting up also my car cranked and shut off happened second time and also not to mention my car stalled out lost power before the abs showed so you think this is something with the regulator please if you could answer this as fast possible that would be great
@@void1689 sorry didnt see this until now. I would say its possible. I dont know about stalling out, because even though all of those lights showed up on my car.. i could still start it up, but i couldnt drive it. i think you should replace the regulator anyways because itll eventually go out. its easy.
@@j0siah yea I replaced the regulator now I got to wait it was easy to replace for sure
Can this cause a positive terminal to overheat
I would like to know the answer to this question too.