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Discussion Starter · #1 · (Edited)
Symptoms
All car electronics would flicker and the car would come close to shutting off. Idle would severely dip, dash lights would flash, and radio would restart.

Procedure
Checked battery, and alternator. All was fine. Did a little searching on Vortex and found that the MKII's and MKIII's have this same issue. With a few MKIV's.
Went to the dealership and bought a new one. Part # 4B0905849 for a list amount of $84.87 and out the door for $91.62. Argued with the guy at the counter that it's not my alternator but my ignition switch. I told him that when I move my key in the ignition it will also cause the issue. After hearing that he gave in and agreed.

Replacement
Ok, I left out some pictures of removing the lower dash because if you are not comfortable removing the lower dash without assistance, then I would recommend leaving this to the dealer. As the replacement is pretty easy and shouldn't take more than 45 mins.
Tools Used:

I used just two Torx bits (not sure on the sizes) and a SKINNY flat/philips head screwdriver that I picked up at Pepboys in the dollar bin a while ago. You will need a small long philips head screwdriver to access four screws.

**Disconnect the negative terminal from the battery first as a safety precaution***
Start by removing the panel that covers the fuses:


Then remove the left panel; it pops right off. When you pull it off you can see the screws that you will need to remove the metal panel underneth both plastic pieces.


Remove the right panel now. There is a small screw at the bottom/middle holding this panel to the metal piece. Remove that screw and the rest pops off:


Now turn the steering wheel as far right as you can. Exposing a small port for a deepset screw. Be careful removing this screw! It can be stripped easy, as I did just that. This is where that long small philips head screwdriver comes in handy!


Then move the steering wheel all the way to the left, doing the same:


Now look underneth, there are two more deepset screws that you will have to remove:

After you have done this it will be a good idea now to remove the lever so you can pull off the bottom plate fully. There are only two torx screws:


Now you can pull off the bottom plastic piece:


On the left you can see the harness and the ignition switch:


Gently pull off the harness on the ignition swich. Its a bit annoying to pull it off all the way as the wire bundle is in the way, but it will give:


Here you can see fully the ignition switch with the harness removed:


**Before pulling switch out make sure your ignition is off, and the key is removed from it***
Now, this part is what made my replacement of the switch take forever!! I could not for the life of me pull out the switch. I was looking all around for some hidden screws holding the piece in, and playing with different key positions thinking it was locked in. Nada.
If you look closely you can see VW painted these screws red!!! Remove these and the switch will easily pull out. You will need a tiny flathead screwdriver for this:


I took a look at the old switch and it looked perfectly normal.
I pulled it apart further and again it looked fine! But concidering VW's electronics, this doesn't surprise me.


Now for installation Just pop in the new switch and reconnect the harness and screws!

Double check the harness, switch, etc. Make sure everything looks good. Just install the metal panel, then the three plastic pieces in reverse order and you are all set!! Reconnect the battery and don't forget to recalibrate the throttle body! You're all set!!

 

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Discussion Starter · #2 ·
Re: **Ignition Switch Replacement DIY** (Seanathan)

And yes the car is dirty!! i don't want to hear it
 

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Re: **Ignition Switch Replacement DIY** (VgRt6)

I believe this is the solution to my issues! Cluster lights flickering, DVD player turning on and off by itself, headlights dimming, idles like crap. And then i would have to get a jump after it dies. Thanks http://****************.com/smile/emthup.gif
 

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Discussion Starter · #5 ·
Re: **Ignition Switch Replacement DIY** (Detachable1)

If you replace it let me know how it goes!!! Check your alternator and battery first like I did. Then if they both read fine, this is most likely it!!
Also- wiggle your key, if it does it when you wiggle then its this thing!

Mine did it ALL the time at idle!
 

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just an off track Q. would you be able to "hot wire" it
 

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Re: (vrsixt9)

Nice! I am glad to see that you don't have to remove the steering wheel do change the ignition switch, like it is on older cavaliers

Let me guess, BOSCH makes the switch, correct?
 

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Discussion Starter · #9 ·
Re: (vrsixt9)

Quote, originally posted by vrsixt9 »
just an off track Q. would you be able to "hot wire" it

lol I was thinking about that when I was underthere. damn immobilizers
Quote, originally posted by vasillalov »
Nice! I am glad to see that you don't have to remove the steering wheel do change the ignition switch, like it is on older cavaliers
Let me guess, BOSCH makes the switch, correct?

Yup. Its Bosch made. Of course. In the Mkiii's you have to remove the steering wheel to access this, so I see VW predicted this issue
Quote, originally posted by abydielsgli »
good work man.
this is what this site is all about

Thank you!!!
 

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Discussion Starter · #10 ·
Re: (Seanathan)

*update* haven't experienced the problem lately so I assume this fixed it

Also- on the manufacturer, I believe the original part was Bosch, not too sure though. But world Impex.com says the manufacturer of the new part is FEBI.
 

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Re: (vasillalov)

Quote, originally posted by vasillalov »
Nice! I am glad to see that you don't have to remove the steering wheel do change the ignition switch, like it is on older cavaliers


ever change one on older VW's? same thing, steering wheel removal.
Another thing, the new ignition switch costs $90??
mk2 ign. switches are like $7...
 

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Re: **Ignition Switch Replacement DIY** (Seanathan)

what about the throtle body. is something that needs to be done when the battery is disconnected? if so , how?
 

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Re: **Ignition Switch Replacement DIY** (siriusjay)

The car will perform the throttle body adaptation on its own. You can speed up the process by doing it manually, but there's no need to.
Gary
 

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Re: **Ignition Switch Replacement DIY** (VgRt6)

Two quick things.
1. The left lower dash panel doesn't need to be removed. You can change the switch without removing it.
2. The battery doesn't need to be disconnected.

EDIT: Nor does the right lower panel, or the steering wheel height adjustment handle need to be removed. You'll get pelnty of room to access the switch with it on.


Modified by SeaBiskit at 11:40 PM 3-1-2006
 

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Re: **Ignition Switch Replacement DIY** (SeaBiskit)

^^^Makes it easier for the Dummies<<< http://****************.com/smile/emthup.gif
 

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Re: **Ignition Switch Replacement DIY** (Detachable1)

Quote, originally posted by SeaBiskit »
Two quick things.
2. The battery doesn't need to be disconnected.
Modified by SeaBiskit at 11:40 PM 3-1-2006

In a sense you are right, it is all low voltage. Regardless, there is some current running through those contacts, and it is probably best to disconnect the battery. Excellent DIY.
Mike
 

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Re: **Ignition Switch Replacement DIY** (SeaBiskit)

excellent DIY. http://****************.com/smile/emthup.gif
 

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Discussion Starter · #19 ·
Re: **Ignition Switch Replacement DIY** (SeaBiskit)

Quote, originally posted by SeaBiskit »
Two quick things.
1. The left lower dash panel doesn't need to be removed. You can change the switch without removing it.
2. The battery doesn't need to be disconnected.

EDIT: Nor does the right lower panel, or the steering wheel height adjustment handle need to be removed. You'll get pelnty of room to access the switch with it on.

In my experience of working on things its easier to take the time to remove things that allow easier access to parts being worked on, than trying to save time by working around things

And the battery is just a precaution. I didn't disconnect the battery when I did it, but when posting on Vortex its a standard precaution
 

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Discussion Starter · #20 ·
Re: **Ignition Switch Replacement DIY** (bhb399mm)

Quote, originally posted by bhb399mm »
excellent DIY. http://****************.com/smile/emthup.gif

thanks

Btw for everyone disconnecting the battery to recalibrate the throttle body, first hook up the negative terminal again, then turn the key in the igntion to the "on" position, but DO NOT start the car. Wait until you hear the throttle body stop clicking. Now you can start the car http://****************.com/smile/emthup.gif
 
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