BMW's have a beautiful wiring loom.
All the plug connections are easy to work with, most have a little lever thing to push them out & they slide out easily.
On Jap cars they use different plastics, some soft, some hard, they 'weld' themselves together too
The plastics solid but thin & when you break it it turns into flakes.
Jap plastics hard but pliable, hard to break & too pliable to cut
The wires don't have little brass clips on them as they use each wire for its own job.
Where in the Jap cars theres hundreds of them, they keep connecting extra wires onto the main wires.
The main connections, theres one on each side of the dash, under it. All wires go from one side of the dash to the other, or from that connector to the 'job'.
Makes it easy to change from a 'left hand drive' to a 'right hand drive' in the factory.
You can isolate each part of the cars (job) operation. Or add a extra wire by just plugging it into the main connectors
Jap cars, OMG! theres sub wires everywhere, you can't isolate anything, or add to it
The dash, hell, in a accident you just remove the dash, they no braces that go thru the dash to hold it in place, just remove the F window, pop out the dash, slide a hammer down there & swing it & all the plastic just turns into large slidey flakes taking up almost no volume.
The steering colums is just a small setup of small but strong metal parts, connected to a diecast Ali bracket.
The heater core & the aircon core are the same size, both Ali, take up little room & don't use much extra padding or insulation. They have small electrical controls (solenoids or electric motors) that are controlled by switches on the dash.
Jap cars, hundreds of bolts holding the dash on, lots of metal braces going thru the dash, holding it & the heater cores & under steering wheel parts in place.
Theres lotsa of plastic insulation around the aircon (which is 3 times the size of the heater core) & heater cores, which have huge dia hoses going to them.
They are bolted to just about everything else in the dashboard & theres a 30mm dia tube running from one side of the inner dash to the other.
Same with the heater controls, all uncuttable Bowden cables & stringy wires, all attached to metal braces under the dash, fixing the lot together
Hell, if I was in a accident & had to be cut out of the car, I'd much rather be in a BMW...
Pop the window out, bash the dash off, smash the under dash into flakes & 100% access.
Jap car, it'd be easyer to cut the car in 1/2 first
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