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  #11  
Old 05-21-2024, 07:47 AM
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Originally Posted by andrewwynn View Post
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 I never updated this particular thread on this topic but I ended up abandoning this project. The bigger roadblock I run into is that cars are not prewired for it: this doesn't mean it can't be done but it would require a lot more work that I'm willing to spend on this.

You'd basically have to recreate the whole wiring: based on WDS there are some connection in the front of the car, some in the trunk, then run the wire to the pump under the car... Way too much work for me. And after is all done the unknown of the coding remains...
Found this in e70 thread. This is my prime concern. I searched a bit for a thread where somebody did this and had no luck.

I've seen in the past where somebody reverse an air spring delete.

If you find that thread you'd find most of what you need to know if you find that e53 unlike e70 were prewired for air possible. (I think the odds are fair this is the case. I used to find capped off wiring quite regulatory on my e53s).

For inspiration;

https://xoutpost.com/bmw-sav-forums/...uspension.html
interesting, so coding is possibly the only concern which can be taken care of fairly easily i assume. hopefully thursday i'll finally be able to dig more into it
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  #12  
Old 05-21-2024, 05:31 PM
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It's worth noting that the coil spring suspension actually holds cargo and/or tows quite well.

I'd say that the primary benefit on the E53 is probably actually ride quality, and you really want the 4-wheel air for that. (I've considered it, but haven't been sufficiently motivated.)
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  #13  
Old 05-21-2024, 10:28 PM
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I too tow with a four-wheel-coil car and I haven't experienced any sagging in the rear. It's the most stable car I have ever towed with, in fact. I do use a WDH though.
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  #14  
Old 05-21-2024, 10:53 PM
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new to me 05 6spd got some questions

When I'm loaded and towing my coil car is pretty sagged but toughed it out.

The one time I really really missed the air was when I put 500# on my tail rack and still had maybe 700# inside! That was a slow ride home from home Depot!

Other than the 3-4 times when really loaded the springs have been perfectly fine and the car rides nicer than my wife's old X5 that had rear air front spring.

I think what I need is just a preload shock or something to give some extra support just when loaded down.
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