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Discussion Starter · #1 ·
Hello all,

My 2016 740i just started having issues where the right side of the car drops down when the car sits overnight. After the car starts and I start to move, it raises back to the normal height. Wondering if anyone could give me an idea on how to troubleshoot this issue?

Thanks for any help.

-David
 

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Discussion Starter · #3 ·
Does both the front and rear of the right side go down, or just one corner? If it's only one corner, see if the strut or air line is leaking. If it's the entire side, the chance that both struts failed together is low, so the issue is more likely to be with the valve block. Leaks can often be identified by spraying soapy water and looking for bubbles.

BMW does not sell the valve block separately from the compressor, but you may be able to get an aftermarket replacement.

It's both front and rear.

I'll try the soapy water but I agree, it's unlikely that both front and rear fail at the same time. It appears the compressor is $1000+.
 

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Discussion Starter · #22 ·
I'm about to attempt this repair. Going to replace the right rear air strut. Can someone tell me if there are instructions on ISTA+ that will give me some sort of guidance? If not, does anyone have any information they can share on how to do it?
 

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Discussion Starter · #24 ·
ISTA should have everything you need. It looks like the rear seat needs to come out to remove the parcel shelf and get access to the strut tower screws, so it's going to be rather involved.
I watched a few videos and they access the strut tower screws through the rear speaker area. I was hoping I could do that in this case. Since I'm really new to ISTA, could you track me on how to find the repair info in the software?
 

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Discussion Starter · #26 ·
Thank you for everyone who helped me with this. I successfully changed out the right rear air shock on my 740. It was a very lengthy and slow process, mainly because I was worried that I would damage some of the interior during disassembly/reassembly. Luckily, that did not happen :)

A few issues I ran into:
1. The rear seat comes out very easily, but the back seat rest required 2 people. It sits on 3 hangers and is cumbersome to do it along. All the other interior parts came out and installed easily. I was very happy for this.
2. Installing the new air strut took 2-3 alone. You need a hydraulic jack to lift the new air strut into place. Some of the time was because I was being extra cautious and at that point I was tired. Also because the lower connection on the strut didn't line up perfectly with the wheel body (spindle?) fitting or was pushing up against it. I had to remove 1 bolt from the trailing arm to allow the wheel body to move out a tad.
3. The rear trailing arm did not align up on the wheel body. I had to twist the whole wheel body while someone else inserted the bolt.
4. Torqueing the strut to 240nm was a task. There wasn't much room and my torque wrench only goes to 204 nm. I did the best I could and plan on checking it in a month. If necessary, I was try and find a mechanic to check the torque as well.

Overall I am happy that I was able to complete the repair. It did take me 4 days (2 hrs, 5 hrs, 6 hrs, 8 hrs each day) but I saved roughly $2700 doing it myself. When the left side decides to go, then my time will hopefully be half.

:)
 

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Discussion Starter · #28 ·
Awesome!
So there was no way to get to the the strut studs by just removing the speaker and cutting through the sound proofing?
Honestly once I decided to follow the ISTA steps, I never really checked. The speaker cover on my car is narrow and there could be an issue getting a wrench to the strut nuts. It might be possible but probably higher chance of damaging the speaker molding. If I ever need to do this again, I could have the interior removed in 1 hr. It's really simple, minus needing help getting the back seat rest out, but worth it in not damaging the car.

Oh, one thing I noticed that was different than in the ISTA steps was it said remove the rear side airbags.. I never found those, even though there was "airbag" written on the C-pillar trim panel
 

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Discussion Starter · #33 ·
BMW has extended the warranty on the front/rear struts for the G11/G12 models for cars under 8 years/80k miles. I had my right rear done recently under this extended warranty. I haven't received a letter in the mail, but I showed my service advisor the letter someone else posted on a different forum. She looked it up and said I was covered.

Little backstory - I was having the same issues that you were having @Plasma . I have an extended warranty, so I took it in for service. At first they said it was one of the solenoids on the compressor were faulty, so they replaced the compressor (covered under my warranty) All good, but my car was still not level and would give me a chassis error when I tried to use the self leveling, so I took the car back. That's when they found a small leak in the right rear strut, but it was high in the bag, so when the car would try to self level it would never reach that point, and give me a chassis error. My extended warranty does not cover struts. I was able to find an aftermarket strut on Amazon. They allowed me to bring my own aftermarket strut and charged $500.00 for labor. I brought the strut, they did the job, and then I found out about the extended warranty on the struts. To my surprise, they honored the extended warranty on the struts, and removed the aftermarket and installed the OEM strut.



BMW extending warranty for front/rear air suspension strut assemblies ~ 8 years / 80K
View attachment 1061252
Unfortunately my car is slightly over the mileage. I glad your issues were figured out.

So BMW allowed you to bring in a non OEM part, and the installed it?
 

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Discussion Starter · #41 ·
Wow, that is a huge relief! I wasn't ready to spend the money on repair. I just threw it in comfort plus (that way it just kept filling the air while driving)

Another question I have is... Would I have to be the first/ Original owner to use the warranty or does it follow the car?
I'm the 2nd owner and got the letter. Do you should be good.
 
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