As per the subject, how does one remove the rearview mirror on Octavia mk3 (dimmable mirror, with light assist)?

 

Car started reporting "Fault: Light assist" and I want to replace the light assist sensor - which happens to be integrated into the mirror.

 

I assume I could just replace the entire mirror and the whole thing should just work? Would there be any coding required?

 

Thanks :)

Have you checked the coding to see if the issue is with the HBA camera? It might not be a camera replacement job yet. As for how to remove it. I don’t know sadly as I have the big A5 camera anyway so it’s probably different.

I have not "checked the coding".

 

I'm new to the whole 'connect-your-car-to-a-computer' thing. I have just ordered bluetooth OBD2 dongle to have a play with it.

 

Would I be able to "check the coding" with it? Or do I need to get a full blown VCDS cable and the app?

 

My thinking is: It worked fine up to few days ago. I have not made any changes to the car since few months ago. Ergo, it's probably the case of sensor going bad. I tried reseting the car settings (within the car infotainment system), but it made no difference. So my next step is to replace the sensor - or the mirror, since sensor is integrated. I found a used one for £100.

You’d be surprised how many times things like this are software issues. It’s not a guarantee, but it’s worth checking. A generic OBD scanner won’t be much help with this, but OBDEleven with PRO certainly would be. Alternatively if you don’t think you’ll have a use for it after this issue (I think having a good model specific scanner is always worth having on a modern car myself) then you could take it to Skoda for a read of the codes and let that inform your decision. It may be that a reset cures it, but it may just tell you that the sensor needs changing. It’s would be my first port of call before changing the sensor anyway

My dealer replaced my mirror (with HBA) because of the mirror's self dropping issue.

The first time I turned on HBA I got the same error message.

My first thought was a loose (or not connected) connector so I removed the plastic cover and checked it but it seemed fine.

When I got home I checked the fault codes with VCDS and the HBA module complained about incorrect coding. It turned out that stupid dealer forgot to code the new module.....

Fortunately I had a previously saved AutoScan so I managed to code the new module according to the old one. Voila, it started working again.

What I am trying to say that save your current coding and code your new module if neccessary. Probably it's a good idea to save an Adaptation map too and also check the channels.

Check for fault codes before you buy a new mirror with camera.

Edited 17 December, 20187 yr by aki78

Thanks for the advice people!

 

I think I'll order myself the OBDEleven package and scan the car before going to the dealers - or buying a new mirror

2 hours ago, milan_ns said:

Thanks for the advice people!

 

I think I'll order myself the OBDEleven package and scan the car before going to the dealers - or buying a new mirror

 

In my https://www.briskoda.net/forums/topic/450261-living-with-the-vrs-facelift-230/ thread there are some photos of the inside of the Windscreen with the covers removed when I had the Windscreen replaced earlier this year, if this helps?

 

I couldn't find the photos in your thread, however I figured out how to remove the mirror myself :-)

 

In mean time, my ODBEleven package arrived, so I now have the error code relating to light assist:

"B200047 - Ctrl. module faulty"

 

I guess I will open another thread since in relation to the error code

Solved!!