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Crank noise when closing sunroof

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7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHCrank noise when closing sunroof

Reported or suspected cause

window regulator

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
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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 suspect a cause
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.

Suspected cause

That's more than likely the window regulator.

Crank noise when closing sunroof
Read full discussion summary

Leading evidence: 'window regulator' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'window regulator' (1 discussions; 0 report identifying it and 1 suggest it). 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.

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1 matching discussions · 7 captured posts examined · 0 partial discussions

Reported and suspected causes (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

window regulator

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
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.

Suspected cause

That's more than likely the window regulator.

Crank noise when closing sunroof
Coverage and how to read this overview

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.

7 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: 20261027T192637Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hello everybody I am wondering if someone here has experienced the same problem The sunroof on my C4S works well. It tilts, and it slides opening and closing well. The only problem is, than it finish the slide to close, after being oppened, it sound a strong "CLANK" on the roof, like metal noise. All the guides and springs look well and greasy. The noise comes from the back of the sunroof Any clue about what can be the problem?

POST 2 / ORIGINAL POSTEROriginal post

Nobody with similar problem?

POST 3Original post

I seem to remember reading somewhere that there is a flat piece of felt along the back side of the sunroof opening. Open the sunroof and look carefully at the back of the opening. Other than that, I've got nothing. Maybe post a sound clip of the clank?

POST 4Original post

Personally, I wouldn't sweat it. Just keep a close eye (and ear) on it. I've had many cars with sunroofs and they all make unique sounds when opening and closing. Most of the problems occur with poor lubrication and dry rotted weather seals that end of leaking water into the car's interior. Currently, my 996's sunroof doesn't make a loud clank when it closes, but does make noises as any mechanical device would when it's going through set of mechanical steps. .

POST 5 / ORIGINAL POSTEROriginal post

Many thanks to both for the quick answers. I have read old posts and I have confirmed that the plastic leap on the back piece is there (what seems to be a common problem loosing it). Actually the soonroof slides smoothly and without any noise, but it is when it comes from open to close, and it reach the final position, that something seems to hit hard, just behind the sunroof against the metal body of the roof. I will try to upload a video

POST 6Original post

Can't comment on the sunroof (yet) but my passenger window does make a horrific noise when it tops out. Sounds like the glass is going to break.

POST 7Original post

Quotes source post: 15378250

That's more than likely the window regulator. Make sure you replace it with a OEM, aftermarket regulators are known to be trash.

This is a source reference. Confirm exact model applicability in the original material.