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YOUR RESEARCHK&N / oil filters and MAF sensor - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Install by the dealer

Performed · outcome unconfirmed

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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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 performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Performed · outcome unconfirmed · Original poster
My BoxsterS is equipped with a K&N replacement filter, fitted by the dealer.
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K&N / oil filters and MAF sensor - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Leading evidence: 'Install by the dealer' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install by the dealer' (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.

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1 matching discussions · 2 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

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Install by the dealer

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
My BoxsterS is equipped with a K&N replacement filter, fitted by the dealer.
Original post Read captured discussion
K&N / oil filters and MAF sensor - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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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.

2 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

986Forum: 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: 20261026T100758Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Recently I blew my Impreza engine because of a faulty MAF (Main AirFlow) sensor. The sensor gave a low voltage, so the ECU sees less air than actually comes in, so the ECU provides less fuel, result is a lean mixture, result is knock, result is a hole in piston (turbo engines are very sensitive to knock and air/fuel mixture) Subaru says the K&N 57i (cone style) filter is the reason why the MAF failed. Oil from the filter polluted the MAF sensor. No warrenty whatsoever. My BoxsterS is equipped with a K&N replacement filter, fitted by the dealer. He wouldn't fit a open style (57i) filter / induction kit in the warrenty period. I'm a bit worried now, any suggestions / experiences ? Mark.

POST 2Original post

Wow, I would get it in writing from your dealer that any engine failures resulting from the use of the installed filter will be covered by Porsche warranty. If not, I would take the filter out until your existing warranty expires. my 2 cents

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