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Q: i drive screen has lines on 2005 BMW 525i

My i drive screen was blurry-- now it just has vertical lines-- am I going to have to replace it? How expensive is it?
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It's part of a fiber-optic ring, called the MOST network. Any faulty module on the MOST ring can shut down other controllers, displays, etc...
It needs to be diagnosed with an OE or equivalent diagnostic computer and a fiber optic by-pass loop. If you can't find a good independent shop you need to take it to the dealership. It requires special training to understand the system and lots of precautions to handle fiber optic components.
The MOST components are expensive, since they have light pulse generator converting digital signals to light source and because of this it's better to know exactly what causing the problem.

Thanks for the insight-- how much do you think the average repair will run-- thousands? I will take it to the dealership.
I'd get a diagnostic, it might be $100-300 - depends how many components they need to bypass with the loop. Than you can get an estimate - it's usually free. After knowing what's the problem you can search for the part (sometimes you can find a good replacement on the internet for a lot lower price than a new) When you have the part installed, it needs to be coded -again with a diagnostic tool - to the car. It should be around $ 100.
If you post the last 7 digit of your VIN#, I can tell you the prices of the new components.
The problem usually caused by 1 component, however dealerships try to sell a lot more than it really needs. We had a 740L client a while ago with a $4600 estimate from a dealer and the repair cost was only about $1000.

Based on the VIN you gave me the car is a 2007 ( Nov.-2006) E60 body with N52 engine, manufacturer production code: NE53
11/2006 E60 525i Sedan N52 USA Left hand drive

These parts are on the network so you can have an idea about the prices.
They don't include any labor. These are MSRP prices, and can be a slight difference between dealerships.

AT-On-board monitor 6,5" FA. ALPINE 1 09/2004 03/2007 65826981559 $1,523.46
Or For vehicles with
TV function
Navigation system Professional
AT-On-board monitor 8,8" 1 09/2004 11/2008 65829193757 $1,828.14

TOP-HIFI SYSTEM AMPLIFIER 1 65129181743 $1,232.18

Rmfd CD changer 1 03/2006 65126983338 $520.33

For vehicles with
Preparation CCC = No
01 Controller 1 09/2008 65826944884 $246.12 +core
For vehicles with
TV function
Navigation system Professional
Head-up display


01 Controller 1 09/2005 03/2007 65826963051 $444.57 +core

1 AT-CCC CD 1 03/2007 03/2009 65839156237 $845.05

01 CD player 1 03/2005 65839182158 $304.70 +core
only suitable for CCC hardware versions
9.x and higher
Hi Zee, could you provide me with what I would need for parts? I have a 2006 where the Navigation screen reboots about every 2-5 minutes and then I also lost my sound. BMW quoted that I would need a new CCC component and then also probably a new amplifier.

Thanks for your help!
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