Replacement roof wiring

flybobbie said:
I have fibre optic Christmas decoration, can bend the fibre to about 10mm radius.
Don't know long term life being bent back and forth.
Built a small test machine and let it bend 24/7 for the next year. Should be sufficient. :rofl:
 
End of the day decent cable would have lasted the life of the car.
Too much of these cars designed for recycling.
Had the dash off, so many attach points broken that i had to glue back together.
Vehicles are decomposing as we drive them.
 
flybobbie said:
Vehicles are decomposing as we drive them.
This will be even more fun in the future:
Modern G-series models do have rear and front electronic modules - REM & FEM

The latter has 8 connectors with up to 54 wires, in total >>400 wires into one Single Box.

Which ordinary mechanic will be able to correctly diagnose problems with these concentrated electronic components in the future?

Cars for car graveyards.
 
Hey guys,

These sensors are operating with 4 milliamperes! There is no reason to double each wire.
Many thanks for huge volume of info.
I am about to rewire my E89 roof weak points.
Can you advise on wire colours please, I'm collecting everything I need before unlocking the roof.
Kind regards Steve.
 
Would be very interested in seeing how this all turns out. Every time a wire breaks its a £800 repair job at BMW. The lead tech at my local BMW said its a £10k+ job to replace the roof loom. There must be a lower cost way to do this.
 
The lead tech at my local BMW said its a £10k+ job to replace the roof loom.
This is complete nonsense coming from someone who has no idea what he is talking about.

There are a total of 6 sensor cables in the rear roof shell that must be replaced in a timely manner.

Can you advise on wire colours please, I'm collecting everything I need before unlocking the roof.
2 left (white & brown), 2x2 right (yellow & brown, green & brown).

These wires break due to their limited quality for use where they are bent over 180° every time the roof is opened or closed.

On each side of the roof there are 3 arches over 180° where the wires in 2 arches are overloaded.


Have you ever heard of a workshop that only replaces a single brake pad if the brake sensor fails? Hopefully not.

But when it comes to roof repairs, every repair shop will make this attempt to get your money for the same problem multiple times.

Btw, a complete loom replacement takes about 6 hours plus ~ 1.000€ for parts. That's way apart of 10k regardless of currency.
 
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I am about to rewire my E89 roof weak points.
Hope you already read @LordLolzeye's "harness replacing" thread before starting to dismantle the rear roof shell:
old screws are glued and have to be warmed up before opening, shims have to be collected in a documented way per screw and so on and so on ... !

New screws are required for re-mounting.
 
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This is complete nonsense coming from someone who has no idea what he is talking about.

There are a total of 6 sensor cables in the rear roof shell that must be replaced in a timely manner.


2 left (white & brown), 2x2 right (yellow & brown, green & brown).

These wires break due to their limited quality for use where they are bent over 180° every time the roof is opened or closed.

On each side of the roof there are 3 arches over 180° where the wires in 2 arches are overloaded.


Have you ever heard of a workshop that only replaces a single brake pad if the brake sensor fails? Hopefully not.

But when it comes to roof repairs, every repair shop will make this attempt to get your money for the same problem multiple times.

Btw, a complete loom replacement takes about 6 hours plus ~ 1.000€ for parts. That's way apart of 10k regardless of currency.


It's up to you who you believe.
I’m just sharing what I was told. No need to get snippy. I didn’t say that **I** made that up.
 
It's not against you personally, but rather the nonsense that the workshops regularly spout, whether BMW or independent.

Just got the same info minutes ago from a German E89 driver: 11.000€ were estimated by a BMW garage.

I will continue to clearly warn against accepting such cost estimates. It is fraud.

The more often we publicly denounce something like this here, the fewer those affected accepted it.
 
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Well, yeah it is ridiculous and I didn’t believe him. My guess is they're not up to the job and don’t want to do it so just threw an insane figure at me. It worked cos I walked out and won’t be taking the car back to them again.

The difficulty is finding a decent reputable garage in the UK to do it. The indies near me have said they won’t touch convertible roofs as its too advanced for them. Maybe I should drive over to Germany and get it done there 🤔.
 
There are several places that repair the roofs. I have used Cayman Autis in Redhill, south London..
They take care of electric roofs from Alfa, Bentley, BMW, VW, RollsRoyce etc…. A lot cheaper than the dealers. And they repair wiring rather than replacing everything.
 
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