Question about Garmin nuvi 255W GPS Receiver

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I attempted to download new maps for my 255W. The download speed to start was around 80 KB/sec. When I was aboutt 9% downloaded the speed dropped to 1KB/sec and I needed 500 hours to fininsh. I quit. Now my computer is so slow I am considering going back to the US Post Office. I want to get back to where I started. Can you help?

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firstly u delete Temporary Internet Files,temp and recent and logs by using given below steps-

C:\Documents and Settings\user\Local Settings\Temporary Internet Files
C:\Documents and Settings\user\Application Data\Microsoft\Office\Recent
My computer-right click-computer management-event viwer-delete application & security logs

Than restart the system and upgrade the anti virus.

check system its working fine or not if same issue occur ,its means some virus attack in ur system thgh sits.san virus and delete it.


Posted on Nov 18, 2009

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Posted on Jan 02, 2017

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I attached my Nuvi 255W gps to my computer to register it and purchase new maps since mine were out of date. I downloaded the new software update after which the unit upon booting up said "no detailed...

When you went to TOOLS did you press SETTINGS and then MAPS and at the bottom of the screen MAP INFO.

When you press map info if the maps are still installed they should appear there. If there's not a tick beside the map name then it's unselected. Pressing the map name gets it selected again and could solve the problelm.

If you do need to download the maps again it may be possible, depending on how long it's been since they were downloaded or updated. (Usually it's possible for around 6 months after they were originally downloaded.)

  • Go to and click the myGarmin tab at the top of the page. Log in using your username and password.
  • Click on the myMaps tab at the top of the screen and you should see your maps displayed.
  • Under your latest update you should see in blue writing a link called DETAILS
  • Click on the link and then at the next screen click on DOWNLOAD AGAIN
When you're following the prompts you'll come to one which gives you the option to download to the Satnav, Satnav and computer or Computer. Select Computer or satnav and computer. Then if you have a problem again with the map it will be easier to install it from your computer. You can find more details on installing from your computer and indeed all about updating your map at

If you find that your map cannot be downloaded again buying a new update, if there's one available should solve the problem.

If you find that your map is locked you can get information on unlocking it at

If you have favourites saved to your satnav it's a good idea to back them up to your computer just in case you lose them. Details of how to do this are at

Feb 26, 2011 | Garmin nuvi 255W GPS Receiver


How do I improve my broadband connection or download speed (aka Access Line...

The Access Line or Connection (download) speed is the speed of your Broadband connection between the local telephone exchange and the wireless router. This is the speed that Broadband is able to provide into your home rather than the actual speeds that you experience when using the internet.This download speed is typically twice the speed of your available upload speed.

Be careful all the major ISP's will test your line and come back to you will a max speed of about 3MB (3072 kbps OR 384 kB/sec) and sell you the product on this basis I have never got anywhere near this tested value. If you divide the tested value by 1/3 this would be a more reasonable speed.

For example if your ISP is able to provide you with a 1MB connection your maximum download speed will be 1024 kbps, in reality you will never reach this due to exchange limitations a connection (download) speed of 900 kbps (0.8MB OR 112 Kb/sec) would be more realistic and 350 kbps (0.35MB OR 44 kB/sec ) for uploading.

If you browse outside the peak period your speed will increase. However It will reduce significantly during the peak period from 5pm to 12am. If you want to download large programs or files, try doing this overnight or at a different time of the day.

Clearing your cache won't make you browse faster it is a collection of files which record your activity on the internet. These files are usually stored in your computer's Temporary Internet Files folder.
They can make browsing the web faster, as loading a page you've visited before is quicker if your computer has kept a record of images and other components within the web page. Clearing these files away can free up space on your hard drive and resolve certain problems you may experience while browsing like slow browser speeds !!

Tweaking your TCPIP can help here is a reg tweak that will optimize your registry WRT your TCP parameters; internet caching and simultaneous downloads.

Test your actual connection OR download speed here and e-mail it to yourself you can also set it to create a graph of your download times it will also show you a comparison of you and a typical value from your actual service provider, you will never get any where near this I use Sky Mid at the moment and I max out at on a 1MB line about 900kbps (112kB/sec) they say sky should offer you 2827kbps (354 kB/sec) which would be 80% of a 3MB line.

Smart test based on your connection speed =>

If you start the automatic test and leave your PC on for 24 hours you will see at what time your connection will max out, the results are stored if you become a regsitered user, this link will test upload and donwload ( this is your line speed) in kbps (kilobits per second)

when finished to you can download the results to a csv (comma separated value) and import into Excel to see a pretty graph if you like.!!!!

N.B.> Make sure you close down VoiPs and Torrents and anything else that will sap you download speed before you do this test also I recommend rebooting your router to gain the optimum results

on Jan 08, 2010 | Microsoft Windows XP Professional for PC

1 Answer

I need to update car garmin 255w navigator

Thank you for your question.

If you need to update the maps in your Garmin, go to the following URL and download the update.

This does cost $79.99, but it's cheaper than getting a new Garmin.

You just hook your Garmin up to the USB of your PC and download the maps update for your geographic area.

Please note: You may want to start your download and plan on doing something else for an hour or two. When we did the download, we clicked the "download" button and went to bed for the night.

The next morning, the download was complete. That was a while back, but it probably still takes a long time.

If this helps, please give me a positive rating.

Thank you.

Feb 26, 2011 | Garmin nuvi 255W GPS Receiver

1 Answer

Sd card lost frm 255w nuvi

I'm assuming your referring to the map upgrade card. If that's what you need, you will, unfortunately need to buy a new one. If that's what you need to do I'd suggest you get the lifetime map upgrade package instead. It's increased cost is modest and allows you to upgrade your maps a few times a year for the life of the unit. On the downside the upgraded map downloads take over an hour to complete with a high speed Internet connection.

Dec 29, 2010 | Garmin GPS

2 Answers

Tell me , what type software use to increase downloading speed up to 200 k b/sec . connection speed 921 k b/sec


With 921 kb/sec(which means kilobits per second) connection, the maximum download speed you would get is 921/8 = 115 kilobyte per second (kB/sec). Even to attain this much speed, you will have to use some download accelerators like Free download manager. You can download that and use it for free at


Aug 08, 2010 | Computers & Internet

1 Answer

In attempting to unsuccessfully download maps on Garmin for a NUVI 255W, I am now receiving an error screen on my Garmin: No detailed maps found that support routing. The nuvi cannot be used without them....

Ok I had same problem. Copy the mapupdater .exe file to another computer with internet access. Connect your GPS and then run the updater file. This worked for me. Good luck

Apr 29, 2010 | Garmin nuvi 255W GPS Receiver

1 Answer

Why does my nuvi 255w not find any roads. I took

you may have to connect it to your computer to reset it. Sometimes when they get a little goofy like not finding roads, characters missing from the keyboard, and crazy stuff. Sometimes connecting it to your computer via the USB cable will reset the unit. Depending on it's age, you can download new maps every year. I just downloaded the 2010 maps.

Feb 22, 2010 | Garmin nuvi 255W GPS Receiver

1 Answer

2GB High Speed SD Card for Nuvi 255W

Yeah you can use any of the Ultra High speed SD cards usually around $25.00 on-line for a 2gig. High speed has a transfer rate of about 2MG/Sec The Ultra's are around 15MB/sec transfer rate so make sure that you get a high speed one and you'll be fine. The $6.00 ones are not what you need too slow for map displays.

May 10, 2009 | Garmin nuvi 255W GPS Receiver

1 Answer

Wireless downloads at very low transmit rate

Could it be the website that is hosting the file?  Have you tried to download it with a different computer?

Apr 21, 2008 | Apple MacBook Pro Notebook

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