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2013 Cayenne diesel
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That's pretty cool, now you need a picture at the equator.
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Poor planning on our part - intended to spend a couple of years driving in South America. Heck we can not even get ULSD diesel in all of North America. It is definitely not available in Central or South America.
That is why we have pre-ordered an Ineos Grenadier
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Tire Automotive parking light Vehicle Wheel Grille
Tire Wheel Vehicle Car Automotive parking light
 

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I've never heard of anyone replacing the compressor or the valve block on the 958s. I know the earlier cars had problems with the compressors wearing out. Subscribed.
 

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Hello, I’ve got a 2011 Cayenne Turbo with air suspension issues. The cold temperatures in the NE have triggered the Chassis Failure warning. The driver front and driver rear sags overnight. Driving the car and letting the compressor run usually clears the dash warning issue but it consistently sags on the driver side overnight.

I recently purchased a Foxwell NT530 to help troubleshoot. I’m still navigating through all the menus but can share the following:

000284 control position not adjustable, vehicle too high or too low
000312 battery positive voltage, below limit value
000257 pressure sensor, signal line short circuit to B+
000201 compressor relay, on time exceeded
000220 vent solenoid valve, on time exceeded

System pressure 2.8
System air quality 68
Front left spring strut pressure 12.50
Front right 2.91
Rear left 2.64
Rear right 2.91

Heights deviation from required level
Front left -39mm
Front right -33
Rear left -32
Rear right -27

It’s nearing 200k miles and I’m open to replacing the struts/bags, valve block, compressor and relay all at once but prefer to truly isolate the issue first.

Its supposed to be warm this weekend so I plan to spray soapy water around the components to check for leaks.

Based on the trouble codes, any pointers on what may be happening?
Sounds like everything i went through at the same mileage
At a glance you is the 2.8 in bar if seems fine
the heights listed if taken in normal mode is way off and you need a calibration.
PM if you need assistance.
Sagging corner would indicate a leak

Target rear height in normal mode is 457mm
Target front height in normal mode is 445mm
 

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One strut was replaced with OEM back in 2020. The other 3 are confirmed leaking now. Lines and valve block have no issues but the compressor will need replacement.

With that said, I will just install the Bilsteins all around, along with a new aftermarket compressor, valve block and relay.

I originally was going to tackle the install myself but due to my workload, I’ll have a local Porsche specialist tackle the project.

What is a fair labor time to install all the components, fill with Nitrogen and calibrate?
 

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1 of 4 shows expiration in 2021, the other 3 are fine. What is actually compromised with time where expiration dates are relevant?

My compressor definitely needs to be replaced.

Any guess on labor hours?
 

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1 of 4 shows expiration in 2021, the other 3 are fine. What is actually compromised with time where expiration dates are relevant?

My compressor definitely needs to be replaced.

Any guess on labor hours?
Its just a shelf life and perhaps not best to be stored on their sides?
Labor is 1 hour per corner
Compressor another hour
fill, test and calibrate 1-2 hours
I would say plan for 8 hours in total
That's $1600.00 I didn't want to throw at a 200k CTT.

If you choose DIY can offer some tips.

On the compressor I bough a rebuilt from RMT it kept blowing fuses the replacement did the same thing after 3 weeks.
buy new is my advise.
 

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I am in limbo with RMT, I just sent the 2nd unit back and they offered me a refund. I will take the money and haven't figured out what to do next if to buy an OEM or ??
I did buy a eBay unit last year installed it last week and its been working fine just a bit louder then the RMT or OE. It has a 2 year warranty.

Leaks, VB and calibration will cause most of the issues you have.

I purchased this unit they wont tell me what happened to it except they had a bad batch. 2nd unit (replacement) had the same fuse issue.

I am leaning towards this unit, with a 1 year warranty same as the OEM Warranty
 

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My CTT is at the indy specialist. I provided the Bilsteins but he preferred to source the compressor and valve body for warranty purposes on his work. I should be picking up my car over the weekend. Let’s see how it goes.
 

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My CTT is at the indy specialist. I provided the Bilsteins but he preferred to source the compressor and valve body for warranty purposes on his work. I should be picking up my car over the weekend. Let’s see how it goes.
Smart to have a shop do the entire thing, it was a painful learning experience but rides like a dream again.
Not a DIY i would recommend
 

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It’s definitely more than I wanted to spend but even with 200k miles on mine, it looks like one with half the mileage. I’m looking forward to the restored handling with the new parts.
I was fortunate finding my CTT the engine, transmission and transfer case, replaced by the dealer.
last year I did the front control arms and front sway way bar bushings, they were destroyed. and couldn't get the alignment done.
 

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The Porsche specialist installed the Bilsteins, new compressor and valve block. He filled the system with nitrogen and calibrated the system. All the faults cleared with the exception of:

Level Control/PASM (A2.3)
000133
Shock Absorber Valve RL, Open Circuit

He believes the rear, left Bilstein is defective with an issue in the wiring harness. Has anyone experienced this before?
 

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I brought the CTT home and did some testing on the harness. It turns out the OEM chassis-side connector is worn and does not stay clipped into the Bilstein connector. I taped them together for now. Anyone know the part number for the replacement connector?

All error codes have cleared and the handling is excellent again!
 
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