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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHNeed DIY Instructions To Replace Lumbar Support
Leading reported evidence
Run piwis
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
I ran a PIWIS test of the lumbar system, which tests the 4-way valve and compressor motor and the components passed.
Leading evidence: 'Run piwis' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check leaks in the bladder and supply lines' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
I am trying to avoid removing the seat to get to the lumbar bladder to test the compressor and to check for leaks in the bladder and supply lines.
Check whether there is air coming out of the compressor
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
I think the only way to find the failure is visually check whether there is air coming out of the compressor to eliminate that component, then if it is working, find the leak!
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
I saw other posts that say disconnecting the bottom isn�t necessary.
Check whether there is air coming out of the compressor
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
I think the only way to find the failure is visually check whether there is air coming out of the compressor to eliminate that component, then if it is working, find the leak!
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
13 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T201111Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I ran a PIWIS test of the lumbar system, which tests the 4-way valve and compressor motor and the components passed. So, I probably have bad compressor, bladder or supply lines.
I think the only way to find the failure is visually check whether there is air coming out of the compressor to eliminate that component, then if it is working, find the leak! The lower lumbar support use to work, but the upper never worked.
My problem is that I can’t pull-off the center seat back cushion to test the pump, bladder and lines. There are 3 clips at the top of the cushion that hook to the yellow metal grill at the top.
Supposedly, you pull-up on the cushion so the clips release from the metal grill bar that runs horizontally. I have pulled up on the cushion very hard, but the clips won’t release.
Could you help me figure out what I am doing wrong? I am afraid if I pull harder the center cushion might tear.
Thanks!
Here is a picture of the 3 clips circled in blue.
No, I didn�t. Would that help? How do you disconnect the bottom? I saw other posts that say disconnecting the bottom isn�t necessary.
Thanks for your help!
from the back of the seat at the lower part, it is attached with a plastic channel. It is kind off a tongue and groove system.
it�s described in the beginning of the video attached by �just one more�
It looks like I will need to remove the seat in order to unhook the bottom of the cushion. I have seen a couple of threads where some claim you can unhook the top of the cushion without unhooking the bottom first.
I have tried several times to unhook just the top, but was unsuccessful. I am trying to avoid removing the seat to get to the lumbar bladder to test the compressor and to check for leaks in the bladder and supply lines.
Any other ideas?
Thanks!
move the seat all the way forward, and recline it. You should be able to get to it from the back seat.
this is what you are looking for.
I don�t see how you can lift the cushion up without releasing it from the bottom first. It�s pretty tight.
There is a wire connected to the bottom cushion heating pad that snakes out the back, close to the hinge. The bottom side of the frame has a connector located towards the front of the seat that is easy to disconnect. You can unfasten the four bolts holding the seat in place and then just tilt it back towards the rear without taking the seat out of the car. Raise the seat up first before you do this. This will allow easy access to all the connectors. Also, I have all the motors and a bladder available just sitting in storage. If you need any parts, let me know and you can have them for free.
Thanks everyone for your help. After I figured out what had to be done, it only took a couple of minutes to remove the center cushion. Here is a video that is very helpful:
https://m.youtube.com/watch?v=Ev4m5cZf5S0
I determined that my bladder leaks and the compressor isn’t supplying air. Has anybody ever replace the compressor? It looks like it’s a real PITA to change, as it’s hidden behind the seat bolster.
This is a source reference. Confirm exact model applicability in the original material.
