VW Polo 9N AZQ 2003 Alternator Stopped Working - Diagnose not charging, Quick fix and permanent fix

Valeo alternator in VW Polo 9N stopped working. Diagnose alternator not charging the battery. Alternator not working WILL cause a car break down.
Showing a quick fix so you're not stuck on the road and a permanent fix by replacing the alternator voltage regulator brushes.
Also showing how to change the engine air filter and talk about changing spark plugs.
PLEASE NOTE: THE DRIVE BELT POSITION SHOWN AT THE BEGINNING OF THE VIDEO IS WRONG. PLEASE LOOK AT THE END, THAT IS THE CORRECT ARRANGEMENT OF THE BELT.
Sorry if I confused you.
Car is a VW Polo 9N 2003 model.
Engine is AZQ
Alternator brand: Valeo
Alternator model
Valeo part number code: SG9B048
VAG Part number / PN: 03D 903 025 E
Valeo VL2 90A 14V
Accessory belt is for AZQ/BME with Air conditioner.
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[@IONHowTo]

Amazon: Alternator VW Polo 9N rex.red/alternator-vw-polo-9n * Tools rex.red/car-tools-kit-mechanic * Cleaning rex.red/car-cleaning-supplies * WD-40 rex.red/wd40 * Torx socket set rex.red/torx-set-socket-45-55-60 * Jack rex.red/car-jack * Stands rex.red/car-jack-stands-heavy-duty * Gloves rex.red/car-gloves-mechanic * Safety glasses rex.red/safety-glasses-anti-fog * Spark plug removal tool rex.red/spark-plug-removal-tool * Spark plug Gap tool rex.red/spark-plug-gap-tool * Coil puller tool rex.red/coil-removal-tool * Car fuse set rex.red/car-fuse-kit * Battery tester rex.red/car-battery-tester * Maintenance kit rex.red/car-maintenance-kit * Subscribe and Ring the Bell to watch more videos. ION HowTo rex.red/ionhowto RedNumberONE rex.red/rno Buy merch store.ionhowto.com/ Check it, buy it, post it and tag it #ionhowto or #rednumberone Join this channel to get access to perks: kzbin.info/door/x4Qbp3iC97kQzj7e7g7slgjoin We earn money from qualifying purchases using our affiliate links. Affiliate links are marked with a star. * When you use our * links, you support this channel. As an Amazon Associate I earn from qualifying purchases.

[@nanthakrishnnan9617]

I did the same, now it's 100% work, thank you so much for your video, I saved my money

[@keystagewiki5320]

The one bit I needed - where all the bolts to remove the alternator are located - not even featured on the video.

[@Juan-pk1we]

Thanks from Belgium 👌

[@mrsteel9026]

Cheers. Very helpful.

[@luckyncube3913]

Thank you very much..👌

[@Alfacinhadesign]

Just fixed my problem ...i had to buy a new belt with 1880 mm thats the correct lenght for my polo.

[@IONHowTo]

Antonio A any parts store should give the correct belt based on the VIN of your car. Really glad you fixed it! 👻

[@samytm26]

Hello, could you tell me the brand of your belt tensioner ? Gates ? Thanks

[@IONHowTo]

I have no idea. Didn't looks at it so close

[@techgamer1597]

My battery voltage drops to below 12.5v when all accessories are on. Also the power steering is very stiff and the warning light is on. Do you reckon the alternator is causing the power steering to drop out/go stiff?

[@IONHowTo]

If the engine is on and voltage is under 13v I would have the alternator checked.

[@techgamer1597]

@@IONHowTo only with headlights, AC , stereo, foglights and heated window on though. When those are off, the alternator charges well.

[@IONHowTo]

Sounds ok, that's a lot of power to provide.

[@marcusshanad8563]

my alternator make noise and car did not start unless someone give me a jump then it started and i drove with it like 5 mile to get home ...any idea where is the problem??thanks

[@IONHowTo]

Start/jump start the car then disconnect from the good car. Check battery terminals voltage with multimeter like you see in the video.

[@KhaleyJo]

i had gasoline leaking (from a black rubber hose leading to the injector) and a shortly after, the battery signal was red, and the power steering stopped working. Is it possible that the leaking could have cause to alternator to fail? Or are those 2 incidents just a coincidence? other than that, everything is like your video. I'll fix the leaking first before starting my car to diagnose the alternator like you showed on the video. thank you

[@IONHowTo]

Fix it asap

[@PrAnG2000]

Excellent video. Just subscribed. What was the product code of the Regulator brushes you replaced?

[@IONHowTo]

I can’t remember if there was any. They changed them in a shop. The ones I had were not used eventually but were the right ones.

[@PrAnG2000]

Thanks for the reply,@@IONHowTo What is the actual name of the brushes product? I've been advised that I need to order a replacement brush for my 05 Polo 1.2 Twist's alternator.

[@PrAnG2000]

@@IONHowTo Also, that knocking trick on the alternator worked for me twice as a friend suggested it for me.

[@IONHowTo]

Best option is to look at the alternator name plate and record the exact model. I used a small mirror to find it. Then google alternator name + brushes set. You’ll find them easy like that. They don’t look black like regular brushes but have bits of metal in them - look like copper. The dimensions are the most important.

[@PrAnG2000]

Thanks@@IONHowTo, will do.

[@DAVESPOTNICK]

thanks

[@farkhodkh7926]

Hello mate, Great educational video, thanks for that. Just quick question. I'm having almost same problem: In cold day started the car drove very little journey 3 mins, stopped in very at shop, then tried to start wouldn't start at all. Called breakdown Engineer, who came and jumpstarted the car, tested and turned out the alternator wasn't charging hence drained the Battery, but when he put rev up little higher something around 1500rmp or above and let it go on idle running it started charging. he told me there's intermittent alternator problem and left. I have tested since then few days with multi meter and every time before starting Battery read at 12.6v (which is perfect), when started and engine running 11.5-12.6v (wasn't charging) but I rev up and let it go starts charging at 13.5-14.2v. My question is: How do i identify where is the problem? Whether Alternator brushes or there's any cable connection problem such as break between battery and alternator? I'd like to avoid removing whole Alternator as I don't have much knowledge ( first timer) and tools, also in case problem is with cable or anything else. Any suggestion or advice much appreciated. Many thanks indeed and sorry for long comment.

[@IONHowTo]

Farkhod Kh when its not charging, the battery dash warning shoud stay on. Without tools, you won’t fix it because it’s not gonna be just a loose cable. 99% its the brushes, The alternator needs to be removed from the car to change those brushes.

[@farkhodkh7926]

Hi Dragos Ion, Thanks for your reply. The battery dash warning light doesn't come on at all. hence never knew there was a problem and ended up draining the battery initially. So 99% problem with brushed in Alternator? no cable issues? Thanks.

[@IONHowTo]

Battery light should come on when you turn on the engine and then turn off after 1-2 seconds unless the led light is burnt. Because it’s getting better after a while, its very very likely its the brushes or the voltage regulator on the alternator. The brushes are part of the vreg. circuit. Best is to take ot to an electrician and ask to check the brushes. The regulator might need to be changed but it shouldn’t cost a fortune.

[@farkhodkh7926]

Battery light never comes on even on turning the key on off, probably LED burnt. Will test and take to electrician. Didn't know brushes located in Vreg. which save some money rathen than changing whole Alternator. Thanks for info.

[@IONHowTo]

Changing the alternator is needed only if it doesn’t sping due to bad bearing problems. Or if the windings are damaged. Even then, the bearings can be replaced. The copper track where the brushes touch the rotor can also be replaced.

[@MrDannyzwo]

Bun tutorialul , ar trebui sa inceri si in romana , Like & Subscribe

[@IONHowTo]

Multumesc 👻 In engleza e audienta mai mare. Sper sa faca KZbin coloane sonore alternative si atunci incarc si audio in romana. 😅

[@V2rocket87]

Did you notice that your belt was not fitted properly in the first place. Check the belt that goes around the pulleys before you went to the mechanics and check it later after he mount it properly. :) Great video by the way.

[@IONHowTo]

Yes, you’re right. I removed the belt without filming then put it back to take it to the electrician to fix the alternator and messed it up. Will check if the belt was like that before I messed with it. I remember even drawing how the thing goes thru all rollers. 😅

[@Kitebiggles]

Thank you

[@RandomClips27.]

When starting the car the voltage should be 14.4v and about 14v with things turned on its you voltage regulator you should change really easy to do i had a problem it wouldn't start 1st time in the morning as the voltage regulator was bad changed it and was working before it was 13.7 v but still wasn't enough to charge my battery properly

[@IONHowTo]

Car is ok since then but your're right, the voltage with engine running should be higher.

[@Schumaher7305]

Nu este putin sub 14v incarcarea? Dupa cate stiu ar trebuii sa fie vreo 14,4v

[@IONHowTo]

Nu stiu cat e ideal / normal. Asta de atunci merge fara probleme.

[@uhneon8507]

I get a lower reading on the 1st wire on the battery so the “alternator fuse”

[@IONHowTo]

Fuses are easy to check with a multimeter

[@uhneon8507]

@@IONHowTo I have but still don’t know if it’s my fuse or not 😂😂

[@IONHowTo]

@@uhneon8507 I had a broken fuse once in the battery case. You can't tell by looking at it. If there is continuity and even if you remove it carefully and it's still in one piece, it's not the fuse. Best is to check battery voltage while engine is running. If it doesn't reach 13-14V the alternator is your problem. They fixed it for me, brushes were cheap but it's not easy to open it without proper tools. Still drives great! never touched it since.

[@uhneon8507]

@@IONHowTo yeah I’ll get a new alternator, my battery is reading 12

[@IONHowTo]

You could try to get it repaired, brushes are usually the problem or bearings + brushes. Depends if it's not too expensive compared to new.

[@palakattv3633]

bk po my reserve kayo alternator.

[@deepakgautam2910]

Wow 🥺

[@mikivojinov6381]

This is an example how u should not test the alternator pulley!

[@TheAzachiel]

You didn't actually show how to replace it.

[@CycloneCyd]

You might find mine helpful then: kzbin.info/www/bejne/rIramp6Xqdd_otE

[@GodsBattleAx]

Dont take your car to an electrician..

[@IONHowTo]

Sometimes its better like that. I had to take it because buying the tools would cost me more than taking it to the guy.

[@johnnymotors2023]

@@IONHowTo Karl is right because an electrician deals with electrical parts only not mechanical stuff. So you took the car to a mechanic not an electrician. Întelegi?

[@IONHowTo]

@@johnnymotors2023 Ok I guess my guy is a jack of all trades but he fixed it.

[@TheArhangel1985]

Nemaš ti pojma. Ko zna ko je sve to radio. Amaterizam.