BMW N47 / N57 Alternator Removal & Replacement 

You’re welcome!

Well worth replacing the alternator if you’re still on the original👍🏻

Did you code the new battery to the car (assuming it’s a similar generation BMW)

@@jimtaylor431 yes i did, coded and registered with ista

Thanks

You’re welcome!

Thanks mate, much appreciated!

That's interesting. I have large sun roof and sometimes I cannot close it when car is not moving. But when I drive even 5kmh I can close it with no issue? No voltage drop occurred while I tested it. What do you think?.....alternator is 15 years old 😬🤔

@@kardan1984 that sounds more like the battery I think? I also cleaned the rubber seals to reduce friction it been great since. Just need to do the Velcro to get rid of little creaky noise with shade closed.

@@FiscalWoofer Thank you reply. Battery is one year old, registered via Ista so baterry should not be issue...hope so 🤞😊

@@kardan1984 yeah that should give plenty of service. Does your roof kind of try to shut then bounce back? As if something is stuck in the way but obviously nothing is there!

@@FiscalWoofer exactly, its trying to close then bounce back but havent find anything there 🤷‍♂️

You’re welcome!

Yep very satisfying!

@@GeorgeAusters today i replaced the fuel lines from the pump to fuel filter on the merc slk. Easy enough but i got some drips of petrol in my eye !!! Ehhh geezzzz had to run to the tap !!!

Good work, damn always wear goggles when working under the car👍🏻

you really need to change that soundtrack good grief reminds me of the old top gear tapes i used get for xmas in the late 80s 90s 🤣 or some alan partridge sketch 🤦‍♂️😂

Thanks man!

Thanks mate👌🏼

This isn't an efficient dynamics model

Exactly that

@@AlexGnok No it’s not

I think that only came on f10/11 models? So after these.

Thank you Marin for this comment, I've got same 'issue' with voltage drops but I do have brake energy recuperation (efficient dynamics model, bmw e90 2009), should I be worried? Sometimes it's ~14.7 and sometimes ~12.6 while the car is running.

Definitely not mate, this needed replacing. You’ll see why in a video soon too👍🏻

I’d recommend replacing it if your car is 10 years old or so and you’ll see why in a video coming soon👍🏻

Cheers Cookie lad

Thanks man and its all good!

It's not, this is not an efficient dynamics model. The alternator needed replacing because the issue is now fixed

@@GeorgeAusters Did you get the alternator tested to see if it was actually going bad?

@@GeorgeAusters mine is not efficient dynamics as well, it's m sport highline but when you put you vin into the vin decoder it shows you that it has that "feature". Did you check yours?

@@GeorgeAusters Because just like you said in the video mine behaves exactly the same - variable charging voltage and etc but nothing is wrong actually

@@GeorgeAusters look for "S1CD Brake Energy Regeneration"

You're welcome!

Yes definitely!

@@GeorgeAusters 😂great vid👍

🤣 really heavy? In your hands it looks like child stuff 😅

@@kardan1984 These things are quite dense ;)

This engine in general is very easy to work on!

e46 M47 layout is a joke, so many parts have to be removed to access the rear bolts for the air filter housing.

Yep N47 is much better

Loved working on my E39 530d… thought that was well designed for working on!

You are most welcome

Legend cheers mate, another job ticked off!

Give it a few taps

Thank you.

Cheers Gary, appreciate it!

No need👍🏻

what code does the pulley have?

Not quite Jon, a couple more videos coming soon regarding the matter👍🏻

Don’t imagine there should be any difference mate

Yep

Check realoem.com for part numbers👍🏻

Nope👍🏻

How long did it take you mate?

@@hman05 around 30mins you will need a special socket to undo the alternator pully

DO NOT remove an AC pipe.. It will need draining and filling again if you do

@@GeorgeAusters Cheers for the response George

I've replaced all 4 glow plugs and the glow plug relay already

@@GeorgeAusters Ok Il'll have a look for the video

@@GeorgeAusters Another question mate, my exhaust tips are completely blacked out in a day after cleaning it up, does this mean someone's gutted the dpf already(I've got some backpressure after checking on Carly). Or have I got other issues?

Yes mate exactly the same👍🏻

Yes

Upto you!

@@GeorgeAusters thanks for quik reply mate

Thanks again!

Haven't noticed really

@@GeorgeAustersplease, can you check after a short drive and let me know cuz I am scared to drive like this. I just want to know if is something normal o I have a electrical problem. the thing is that I never checked before if is getting hot or not, even the belt is getting hot. thank you ✌️

There was mate, I have another video coming soon👍🏻

the computer adjust voltage around 13V when alternator is very hot,but if goes under 13V is not ok

These cars do usually have an IBS sensor which in conjunction with CAS and battery registration regulates the charging of the battery (smart charging as some call it) based on age, health of the battery and so forth which is why battery registration is so important. If the alternator regulator fails however it may behave in a similar way but not intentionally and may cause random electrical issues, overcharging, voltage spikes, burning and other unwanted problems. It is obvious that George's alternator regulator had probably failed or the regulator brushes had worn out and putting a new unit in solved the issue (you can replace the regulators easily enough and more cheaply). Our 2005 320d has just had multiple electrical issues as the alternator was overcharging and needed replacing / repair. All sorts of ABS DSC faults, yellow battery and other warning lights just because BMW modules don't like excess voltage (and can be fried).

Nope, no issues👍🏻

It wasn’t fitted backwards

DOUBLE SIDED BELT

@@raheelosman7523 thanks alot, i was about to lose my mind 😅

Yeah I usually top up as soon as I hit a quarter. Needs to be half full+ if you have DPF in place though👍🏻

May have to knock in the dowel

@@GeorgeAusters i did. But no way josé

It's sometimes how youtube works mate. If you have a boring title then nobody watches

@@GeorgeAusters haha you're the youtuber so you probably know best ;) Keep up the good work!

@@evertdekwant1163 Thanks man!

It’s definitely not.. This belt has grooves on both sides👍🏻

You'll see in a video soon why it's best to just replace the whole alternator!

@@GeorgeAusters I know its only a long shot if its just the brushes that are worn and nothing else? but if that's all that's worn and there's still enough copper above the ceramics it can be a really cheap fix that'll get ya out of a hole! Alternators are crazy money here!