How to downgrade to an older map version?

When you say the lane assist is screwed up, what do you mean? That the information is wrong or that it's not there anymore? Where do you live?

I live in Phoenix area. On one of the freeways (Loop 101) we had additional lane(s) (HOV) added recently. The map 2013.30 includes those changes but Garmin messed up big time on those updates.

I think that the only way to go back to an earlier map on your own is to have backed it up to a computer when it was the map on your GPS, then to restore all the needed filed from the backup to the nuvi overwriting the nuvi's files of the same name.

It looks like that's the case.

I clicked on the download button next to 2013.20 under installed maps on my.garmin.com but the Map Updater installed 2013.30 instead.

I'm wondering why Garmin offers download button next to "installed maps" on my.garmin site?

I used to save at least one older version of the map, but stopped a few updates ago because I had impression I could download them any time I needed them.

Just the opposite here in Tucson. The latest map update has increased both the number of exits and intersections covered plus excellent lane coverage for both lane assist and junction view. I have yet to find any freeway junctions that are not available for junction view and even found where there are multiple lanes available after exiting the freeway where the ramp intersects the road crossing over the freeway there is lane assist info shown.

I too have problems with some of recent garmin updates and would like to go back. There really isn't a convenient way to do it that I've found.

It's one of those lessons we learn the hard way sometimes. It doesn't take up much h/d space. I have complete back-ups of both mine since day 1. No matter what I do or Garmin does I can always go back.
I do not have the new maps installed to the computer,
rather I put them straight onto the unit. I don't find any value in that option, since the unit gets backed up before i update anyways.

Junction view is great. Almost every exit ramp is covered.

Lane assist is there, but wrong. Instead adding just one new lane, they have 2 extra lanes on the right that don't exist. When you approach I-17 from Loop 101 (both directions) instead showing 5 lanes they have 7. When you need to stay in 2 right lanes, their lane assist is suggesting to stay in 3rd and 4th from right. Similar situation is when you approach SR-51.

Navigation is messed up too.

I have a back-up. But the map is 2012.10. I tried to put that one on the unit and see if garmin lets me choose any of the available maps. No luck. Although I tried to download 2013.20 it redirected me to 2013.30.

Depending on the unit. It used to be that saving your gmapprom.img was all you needed to do. With new units and many new features there are 7/8 files updated with every map update.

Since I haven't updated yet, I thought I'd try to get some specifics.

What issues are you experiencing that make you feel the need to revert back to an earlier version?

While the carpool lane on the 101/202 interchange isn't on my current map, it doesn't prevent me from using it. While I admit the GPS may be "lost", I'm not.

I have come to the conclusion that if I get to my destination when in unfamiliar territory, the GPS served its purpose. Don't really care that it took the perfect route, just that I arrived.

Any input to the actual issue would be useful.

Thanks

The problems I'm referring to are with lane assist feature that are part of the map.

MapSource crashes frequently with 2013.30. Unfortunately, since I can't roll back the GPS to 2013.20, I'm stuck with it as is.

Open a mapsource file.
Just below the tool bar reads
City Navigator North America NT 2013.3
Click on the down arrow.
All the previous versions are there.
Edit: I have no problem when my GPS is not using the same map version as Mapsource

On a motorcycle route, there are frequently a lot of shaping points, via points placed on intersections to shap a route to certain roads without making a waypoint. Shaping points are not flagged or announced on the Zumo models. There is a serious problem when different map versions are used. Routes get miscalculated and send the rider in all sorts of misdirections.

Although you probably wouldn't want Prefer Highways for a motorcycle trip, using it solved a crash someone else was having with 2013.30. With your shaping points, it might just work though...

See http://www.poi-factory.com/comment/reply/38056/307753 for instructions how to set it.

Unlike maps on Garmin GPS devices, maps on a computer accessed with Mapsource will let you remove versions and keep your older versions.

If your Mapsource is on a Windows PC, just go to Control Panel, then either Add/Remove Programs or Programs & Features, then uninstall 2013.30. I assume there's also a way to do this with a Mac.

Unless you uninstalled your previous map version on the computer, it will be there for you inside Mapsource.

I will say, though, that I haven't experienced any problems with Mapsource and the current map--and my Mapsource can access 19 different maps including 14 versions (current plus the previous 13) of City Navigator.

Last week I noticed four lane assist errors in the Toronto GTA area. At first I thought the problem was with the new 7.50 2xx5/3xxx firmware, but it turned out to be the 2013.30 map.

Here's a funny example of an upcoming right turn that the lane assist shows as all lanes proceeding straight ahead. In the 2013.20 maps, the LA shows the correct right turn arrow for the curb lane - http://goo.gl/tFiiB

Don't think it can be downgraded easily once it's updated.

@777ER: If you're referring to the maps, its straightforward if you have a backup of the previous maps to restore from.

...NOT

If you have your GPS at your computer - back it up right now.

If you do not have it with you, go get it and back it up before going to the next post.

If your GPS is out and about right now, get a piece of paper and a big marker and make a note to back it up. Go put the note by the door so you won't forget it.

It will save you from having to ask the question that starts this thread. As WAASup says, some solutions will be straightforward.

Unless I am reading the OP and a Cdn poster wrong, these L.A problems are in their own home area. Me thinks in a case of it being in your home area do you need the GPS to tell you where to go?

I drive 3000 miles every fall to Mexico and then return in the spring and my Garmin serves me well. Though I have to admit the 2013.2 version did me wrong in several states and I am hoping the 2013.3 will be better and without those errors I experienced.

Do we have a list of all the files needed to do a restore? Thinking ahead in case I want to go back. I can't imagine needing to restore every single folder from the unit but then again I'm not sure.

Hard to give a list since different models have different features and file systems. Those with voice command will have an ASR folder that gets updated with the maps. Those without Voice Command will not have that folder.

I suppose you could look at the date and time stamp of the gmapprom.img, gmapprom.unl, and (newer units) gmapprom.gma files. Then look for files for same date and times within a few hours depending how long the update took.
That would be a start but I'm unsure it would be conclusive.