MkIV not reading disks
 

I've just fitted a secondhand MkIV sat nav module to replace my broken MkIII. I put it in and turned it on, all seemed fine on the monitor but when I selected navigation a message came up insert CD/DVD even though I had already put one in. I changed the CD to a different one I had and that didn't work either. I left it a while and then a message came up saying "error reading disk"


The unit seems to take the disk ok, it spins up and it ejects ok, just can't read them.

Any suggestions?

use a different brand

i usually use dvd rw=+ or-

I was using the original BMW disks that came with the car

You could try a Laser cleaning disc.

I've tried that and it doesn't seem to help either.

I decided I might try to find an original copy of a BMW nav disk on DVD, mine are on CD and maybe just the CD laser part of the mechanism is faulty. So far I haven't got one, a friend has a range rover with DVD nav, that disk didn't work but I'm not sure if that was incompatible disk or faulty drive.

I'm not sure I'm following all your steps - replaced bad Mk3 with Mk4, but then did you attempt to load the software to update the system, before attempting to read a nav disc??? I don't know if the Mk3 CDs will work in a Mk4 DVD. You may need to get the DVD version of you area.

You can use the CDs in the DVD Player, but better with the Proper DVD Map disc of course.
Your MK4 is sounding faulty though, possibly Laser US?
If stuck I have 07-01 DVD Europe High Disc Genuine Boxed. PM me if you cannot source one.

I'm thinking the laser myself, I presumed the computer part is ok because the software is still on the unit and seems to be working ok

i've just tried a genuine bmw dvd and it still comes up with the error reading message. I'm going to see if I can get my money back, otherwise I have to change the laser mechanism.

I'm still confused with this thread? unless Mk3 software will recognize Mk4 nav dvd?

I'd concurr with worn/weak/old/faulty laser.

Replace entire DVD mech (easy), or ask seller to give you your money back.

X5flyboy, my Mk3 was faulty so I replaced it with a Mk4. The Mk4 was secondhand and already had the mk4 software loaded on. The software is stored on the GPS/DVD/computer and by replacing the unit I automatically upgraded to mk4 software.

So the system I am running is now on Mk4 software but the drive will not read cd/dvd's so I can't use the navigation because the maps won't load. Hope this explains it.

Okay..., I still learning this stuff, but how do you know what's loaded in the Mk4? does it display the version? (4-????) Please forgive me if these appear to be too simple (dumb) questions. Am finally understanding MY nav (after owning it for 3yrs) and am just starting to update it from the original 3-1/20 version. I also am scheduled to install a Mk4 in a few weeks. So please forgive this "ol' dog" trying to learn new tricks.

Look on the top right corner of the settings screen

Yes, that part I've learned. I assume (something I really hate to do) when replacing a nav unit (Mk3 or Mk4) that the "new" unit has software already loaded?

If so, I understand it may need to have the software updated. I've learned (thanks to this website, and NOT from any dealers I've asked) that the latest version is V32, AND you also need V17 or a key CD to finish the install.

Only if purchased 2nd hand.
if purchased brand new from a dealer, it will not have the OS software loaded.

The latest version OS for the Mk4 is 4-1/100

This is available on OS disv v32 and on OS disc v31.
Remember, the OS disc contains software for 7 different nav computers

But generally, you always use the mosrt recent release OS disc (v32) to load the current software version(4-1/100) onto the nav.

The key CD is only needed for the Mk3 nav when changing from non-aplit screen to split-screen software versions.