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Sorting out Ignition Switch and Lock issues
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vwwestyman
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PostPosted: Thu Oct 02, 2025 6:37 am    Post subject: Sorting out Ignition Switch and Lock issues Reply with quote

I think the issue has gone beyond the scope of the thread I originally posted in, as I'm having all kinds of difficulties now.

The tab part that engages the electrical portion of the ignition broke out of the lock portion,
as described in this thread.

I bought the part and swapped the end over as described there. That went overall smoothly... Until I went to install it in the Van.

I have two issues:

First, the button doesn't want to pop out when the key is removed. It was very tight so I sanded all the way around the perimeter, as well as the tab itself to smooth it out. Also sprayed in some Super Lube. That has improved the issue but not fully resolved it. It still doesn't want to pop out fully when inserted into the steering column, though most of the time it is enough to stop the door chime and turn off the radio so whatever...

The second issue is that sometimes when starting, the slide lever that moves the shift lock cable gets jammed up.

Instead of sliding to the left and staying there, unlocking the shift cable, it will sometimes slide back to the right and jam things up, so the key is stuck barely in the run position. (i.e. just to the left of "start" but barely, and it can still be turned toward start and cause the starter to hit the running flywheel if you try to wiggle the key to loosen it.)

When this happens, the only way to get the key to return fully to the run position or turn off the engine is by taking a screw driver and manually pushing that tab over.

It *seems* like if I push in on the collar of the lock, it keeps this from happening; the lock is slightly loose and wants to pop out slightly. I think that is probably because the lock spring was damaged when I drilled the housing.

Unfortunately, when I was frustrated at the button not popping back out, I tried the new URO Parts cylinder in there, and it's spring tab didn't line up with the hole as well, and when I tried to drill the hole slightly larger, it's spring also got damaged!

Ugh.

Finally, before I went to put all this together the first time yesterday evening, I spotted a tiny spring and little brassy stepped "button" laying in the bottom of the opening for the lock. The spring seems to fit inside the "button" but I'm not 100% sure where it is supposed to go. There is a hole in the column lock that is about the size of the diameter of the button, so on a guess I inserted the spring into the button, and inserted that assembly into the hole (spring in first) and tried to get the lock in. I don't know if that was a bad guess or the spring popped the button out, but it had not stayed in place when I removed the lock after that (to try to sort out the issue with the button not popping out.) I was able to recover the spring, but the brassy "button" has now fallen back in there somewhere and I can't find it.

Ideas on where to go from here?

Was my guess on where the button is supposed to go correct? What is it's function?

The worst part of a 10 minute job is when you've been working on it for 3 hours!

Video shows how the shift cable lock gets jammed up, and then a small pin in the lock that may or may not have something to do with the shift cable lock... I couldn't decide for sure.

Arrow in the pic shows the hole I guessed the button was supposed to go into.


Link


Image may have been reduced in size. Click image to view fullscreen.

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Tom Clark
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PostPosted: Thu Oct 02, 2025 8:33 am    Post subject: Re: Sorting out Ignition Switch and Lock issues Reply with quote

Can you tell exactly what “part” you bought?
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vwwestyman
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PostPosted: Thu Oct 02, 2025 9:28 am    Post subject: Re: Sorting out Ignition Switch and Lock issues Reply with quote

I linked the thread I followed but maybe that wasn't obvious.

I did the same thing described here, including ordering the part through Amazon even.

vanaaron wrote:
This group has helped me multiple times over the years, so I'm hoping to give a little back.

The ignition system on my van died, and at first I thought the issue was the ignition switch. But after taking it apart, the switch wasn't the issue. Thanks to another post here (I'll see if I can link to it) I learned how to drill a hole in the ignition body to pull out the lock cylinder and located the issue. The far end of the lock cylinder has a thin tab that engages with the switch, and the tab broke. There is such small contact area with the tab that I'm surprised it hasn't failed before. This is what it should look like:

Image may have been reduced in size. Click image to view fullscreen.


This is what it looks like broken:

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.


To buy the whole cylinder assembly online is at least $200, and the local VW dealer wanted almost $350 for it. And that doesn't even include the cost/time to rekey a new cylinder.

Fortunately, the tab that broke is part of a small end piece that's designed to be separated from the rest of the cylinder (probably designed to fail for some reason). There is a small pin connecting the end piece to the cylinder, and it can be tapped out with a small nail or punch.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.



But not even the dealer was able to find just the end piece for me. So in my online searching I was using the part number that's stamped on the end piece, and full lock cylinders were coming up. The part number from the end piece is 357905855B

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.


So I took a chance and bought a lock cylinder assembly that referenced this part number, but was really meant for an earlier model EV. The cost was less than $20 on Amazon:

Image may have been reduced in size. Click image to view fullscreen.


Here are the two cylinders next to each other:

Image may have been reduced in size. Click image to view fullscreen.


As far as I could tell, the end piece was an exact match. But I later found that the machining was slightly off.

First, there was a very small misalignment with the holes so the little black pin wouldn't sit all the way in. I gently ran a drill bit thru the holes and then the pin went back in nicely. Here's the new end piece installed on my old lock cylinder:

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.


Then I had to grind down a couple spots on the new end piece to match the old one. I only realized this after reinstalling the lock cylinder assembly into the van twice and having it stick when removing the key. The engine started and stopped just fine, and it allowed me to remove the key, but the internals were sticking which caused the van to think that the key was still in the ignition. So I made several passes at grinding with a Dremel tool to make the new end piece match the wear marks on the old one. Here are the two end pieces before I did any grinding:

Image may have been reduced in size. Click image to view fullscreen.


I didn't get a photo after grinding but you get the idea. So with everything reinstalled and functioning properly, I paid less than $20 to fix the problem. I didn't have to dig thru the junk yard. I didn't even have to rekey.

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vwwestyman
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PostPosted: Thu Oct 02, 2025 10:44 am    Post subject: Re: Sorting out Ignition Switch and Lock issues Reply with quote

The pop-out function does seem to be getting better as I've driven the van a couple times now today. Maybe it is "wearing in" a little bit or something.

I ordered another URO lock from Amazon to steal the spring from. If that holds the cylinder in place more securely, it may fix the problem altogether.

I am still anxious to know about that tiny spring and the "button" it seems to do something with.
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vwwestyman
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PostPosted: Tue Dec 09, 2025 9:51 am    Post subject: Re: Sorting out Ignition Switch and Lock issues Reply with quote

I'm getting tired of how I have to drive the Eurovan... Not to mention that when someone else has to drive it (e.g. a month ago, my sister had to drive it to pick us up from the airport) I worry about things jamming up and them getting stuck.

Image may have been reduced in size. Click image to view fullscreen.


Currently, you have to put the key in the replacement cylinder, turn the key carefully while being mindful to push inwardly on it, while making sure that the original key is placed in the immobilizer reader loop for it to start and run.

If you don't push inwardly enough, the key will turn and the engine will start, but the shifter unlock lever won't slide to the left; it'll jam up. When that happens, the engine is running but the key is stuck in between "start" and "run" and the shifter won't move. You cannot jiggle the key to unjam it; that doesn't work and you risk hitting the "start" position while the engine is running, making the starter hit the spinning flywheel. (It also doesn't turn far enough back to lock that out.)

Then you have to manually force the lever to the left with something like a tiny screw driver, just pushing on it. (You can see the scratches where that has happened and the screwdriver slipped or whatever.)

Image may have been reduced in size. Click image to view fullscreen.


Now, when I originally got it all pulled apart, I found this very small spring and little brass button. It was as if they'd just sprung out of wherever they live when the cylinder was removed. They were just laying there in the housing. The button is hollow and the spring fits inside the opening pretty closely, so I believe they go together.

I'm wondering if maybe they are the "key" (pun intended) to prevent this jamming up of the shift lever.

Image may have been reduced in size. Click image to view fullscreen.


There is a hole in the part that slides to the left when the steering column locks that the brass button fits pretty correctly, but that also means it would be sliding along a twisting part of the lock cylinder, so I'm not sure if that is correct. When I tried that once, it seemed to jam up and I was afraid I'd break them. It is hard to know for sure if perhaps it tried to pop out when I was going to insert the lock.

Here you can see the hole in the column lock that the diameter of the button does fit, but again I'm not totally sure if that is correct, and/or which direction it would go-- i.e. spring in first with button facing out, or button in with spring facing out. Or, I suppose, if I'm maybe even missing another piece of some kind?

Anyone have any idea? I'm having a hard time finding any pics of the lock housing at a similar angle, so I can't see if there is supposed to be anything in that hole.

Image may have been reduced in size. Click image to view fullscreen.

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vwwestyman
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PostPosted: Tue Dec 09, 2025 12:39 pm    Post subject: Re: Sorting out Ignition Switch and Lock issues Reply with quote

After making that post, I went and watched several youtube videos, and saw a couple quick frames that very briefly (and grainy-ily) the inside of the housing, and it sure looked like the little button was in that hole.

So I tried it, and when I pulled the lock out, I noted that there were some contact marks on the lock that were similar to wear marks on the old lock, and determined that was from the button rubbing on it. No idea what purpose it actually serves, but it is back in place.

Image may have been reduced in size. Click image to view fullscreen.


The problem is, that didn't fix the issue of the shift lock jamming up. Fiddling around with it, I realized that the problem is the whole lock wanting to push out of the housing a little bit, and if it does, it won't properly contact the internal lever for the shift lock. That's why you have/had to apply good inward pressure to keep it from jamming.

It happened while I was running the replacement lock, and was more likely to happen with the original lock... I presume the original is a little more worn in or whatever.

So, I drilled and tapped the housing for two set screws! This was necessary because only one (the bottom one) cocked it just enough in the housing that the button wouldn't return when the key was removed. The second helps center the lock. Upon a quick test (driving to work) it seems like this may keep it from jamming up as easily.


Image may have been reduced in size. Click image to view fullscreen.



I'll try driving it like this for a while, and see if it continues to work before I consider reinstalling the plastic column trim.
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Joshwa
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PostPosted: Tue Dec 09, 2025 1:56 pm    Post subject: Re: Sorting out Ignition Switch and Lock issues Reply with quote

Good troubleshooting. I leaned towards the side of the new cylinder binding up due to slightly different tolerances. I had a cylinder bind up on a later model due to a little bit of oversizing.

Did you try just swapping out the lower piece of the replacement cylinder onto your original? Then you would not have to have two keys and the body of the cylinder would likely fit better, since it is the original.
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vwwestyman
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PostPosted: Wed Dec 10, 2025 8:36 am    Post subject: Re: Sorting out Ignition Switch and Lock issues Reply with quote

Joshwa wrote:
Good troubleshooting. I leaned towards the side of the new cylinder binding up due to slightly different tolerances. I had a cylinder bind up on a later model due to a little bit of oversizing.

Did you try just swapping out the lower piece of the replacement cylinder onto your original? Then you would not have to have two keys and the body of the cylinder would likely fit better, since it is the original.


Yes, that was the original attempt. (And a replacement tailpiece is on the original cylinder.)

Problem continued to be the shift cable lever piece binding up, I think due to the cylinder wanting to back out slightly.

The new lock cylinder I used for a couple months, simply didn't try to back out *as much* as the original. (It did some, and would occasionally bind too.) But overall, it was less prone to backing out and binding with some careful inward force being applied when turning the key. That's why I just used it like I did for a couple months.

But I was tired of the bulk of the two keys, the finagling required to get the engine to run, and all that.

I can't really decide what the little spring and button's real purpose is, other than maybe to help the key button pop out when the key is removed.
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