Posted by: Amr on: October 13, 2007
After Buying my lovely 740IL with many complaints from my friends regarding the maintenance and consumption rate troubles, I decided to fix it and try things before getting it into any garage here in Amman.
Wondering if the 30,000 or more will stop me from damaging things in order to try to fix them, or will encourge me not to pay another 30,000 or so for parts and maintenance! as what I paid for my ex-BMW 520 last summer :S
Yep, you’ve got em and you’re gonna lose em. It seems that BMW left it out of the user manual, but our pixels are prone to disappearing. It’s true, if you haven’t experienced it yet, you’re bound to find your pixels one day have left your MID and have wound up on a milk carton. This leaves you with one of two options:
1) Replace the speedo unit for 350JDs (or hopefully under CPO warranty); or 2) Try the alternative “cheaper” method – Contact Cleaner.
Since I’d rather the 350JDs be a last resort, I opted to give the contact cleaner a shot. Below, I have illustrated the procedure with my photos. I am hopeful that this will make it easier for you and help you decide which route you’ll take in your quest to become un-pixellated.
The beginning – the missing pixels…


Not unbearable, but I’d prefer to have them at 100%. So, this attempt at restoring the pixels is not guaranteed, but has worked for others, so here we go…
1. At the top of the speedometer unit you notice 2 screws. Remove the 2 screws with a T10 torx screwdriver.
2. Using a flat head screwdriver, wedge in the screwdriver between the dash and the speedo unit. See pic below…

See how easily the entire unit comes out…

3. Disconnect the 3 wiring harness connections – just push down on the center of the connector and flip up the locking lever.4. Once totally free from the wiring harnesses, disconnect the wired ribbon that plugs into the speedo/tach from the module. (sorry, I couldnt put good photo for this here!)
5. Now depress the button and slide the module to the right. It will easily slide right off…
6. Locate the 5 “X” type connectors. These hold the housing and the speedo/tach together. Twist the “X” connectors to line up with the holes on the housing. I don’t have a good pic, but you can see them in the pic above. I had to use needle-nose pliers. These were tough, but they will move. NOTE: Upon reassembly I left the connectors twisted, because the unit snaps back together and is still a very tight fit.
7. Once the “X” connectors are lined up, you will need to depress the 2 clips on the top of the unit, and then the 2 clips on the bottom. This will allow you to separate the the speedo/tach from the housing. See the result below…

8. Lay the speedo/tach face up on a soft surface and remove the 8 torx screws, using a T10 screwdriver. NOTE: This will not allow you to open the housing, but it will loosen it enough to allow you to spray the electrical components inside.

9. Looking at the bottom of the speedo/tach you’ll see the MID is held on by 2 clips. Use a flat head screwdriver to loosen the cover of the MID. This will allow you to spray underneath the cover onto the orange plastic – which is actually an electrical display board for the pixels.
10. Spray all holes and connectors with contact cleaner, including the ribbon connector. The contact cleaner should be “plastic safe” and residue free (5 JDs I bought it from Al-Bashiti – Amman). The stuff I used dried within 20 seconds of application. I drained any run off and let the unit dry for 15 minutes. You might want to spray the wiring harness connectors that are hanging from the exposed dash.

11. Reassemble and good luck!
Total time: Approximately 45 minutes
My pixels were partially restored (99%), and they seem to be “fading back” to full brightness. A couple of pixels are still missing entirely, but I think it was definitely worth the effort. I went back in and did it again.
Note: for the ones who read this post and wonder if I can afford its fuel; No worries, I own another BMW 3 series and Mitsubishi Lancer, so in congistion days I use small cars
Amr ,
Your information regarding the pixel issue has been very well received. I look forward to attempting the repair.
Thank you,
Steve
Thanks for this info! I have a 740IL and the pixels are jacked up! I’m going to try this! Thanks so much!
Spizy
150,000+ miles. LA california.
my pixels are 85% dead! i cannot read anything it says …so, i am trying this today. its 2:pm now 6/14/2009
i will let you know how it goes.
ok ..i am dumb. i broke the fuel gauge spring thing.
i did everything you said on here, which led me to NO problems, but no solution either. So, i wanted to really fix it, but, it is NOT worth trying to fix this pixel problem yourself if you do not want to pay for a new one in the first place. Since, this guide only takes you as far as spraying the cleaner on the orange plastic (which isn;t where the pixels are illuminated from, nor where the problem is) i tried to look into other guides to help me take the entire thing down to where the pixels plate connets to (big mistake)…i pulled out the fuel gauge meter just to find out that there are springs attached to those stupid things (i thought the back and forth action were in the motor) but no, stupid bmw attaches springs on the gauges itself. so when i try to pull it out the spring uncoiled and i had a very hard time winding it back to where the meter went back to E(empty)
i thought i was good with taking things apart, but this thing is too small and too many pieces and wayyy to expensive to play around with.
i will just drive around with the thing L E T H S = L I K E T H I S
lol..
ok bye
we just did it and it worked 50% after giving our spedometer a shower instead of just spraying the orange board
January 15, 2008 at 10:07 am
Thanks for the info.