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Spark Plug Replacement

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6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHSpark Plug Replacement

Leading reported evidence

Use vehicle i buy

Performed · outcome unconfirmed

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Unsuccessful attempts: 1
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Discussions that performed work without a confirmed outcome: 1

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Performed · outcome unconfirmed
Any used vehicle I buy, when changing fluids, I will usually pull the plugs to look at them.
Original post Read captured discussion
Spark Plug Replacement

Frequently discussed work

Replace by swapping those plugs out

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Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion
You probably won�t notice any change by swapping those plugs out.
Original post Read captured discussion
Spark Plug Replacement

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Leading evidence: 'Use vehicle i buy' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace by swapping those plugs out' (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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Replace by swapping those plugs out

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion
You probably won�t notice any change by swapping those plugs out.
Original post Read captured discussion
Spark Plug Replacement

Replace fluids, i will usually pull the plugs

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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

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Suggestion
Any used vehicle I buy, when changing fluids, I will usually pull the plugs to look at them.
Original post Read captured discussion
Spark Plug Replacement

Replace plugs

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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 read a lot of different things about the frequency at which one should change the plugs.
Original post Read captured discussion
Spark Plug Replacement

Replace they will likely have some cracks in the cases

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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

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Suggestion
If they haven't been replaced they will likely have some cracks in the cases, which will create problems at some point.
Original post Read captured discussion
Spark Plug Replacement

Frequently discussed actions (6)

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

Replace by swapping those plugs out

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
You probably won�t notice any change by swapping those plugs out.
Original post Read captured discussion
Spark Plug Replacement

Replace fluids, i will usually pull the plugs

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
Any used vehicle I buy, when changing fluids, I will usually pull the plugs to look at them.
Original post Read captured discussion
Spark Plug Replacement

Replace plugs

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 read a lot of different things about the frequency at which one should change the plugs.
Original post Read captured discussion
Spark Plug Replacement

Replace they will likely have some cracks in the cases

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
If they haven't been replaced they will likely have some cracks in the cases, which will create problems at some point.
Original post Read captured discussion
Spark Plug Replacement

Run same

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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
You can still do it, but just saying, the car probably will run the same.
Original post Read captured discussion
Spark Plug Replacement

Use vehicle i buy

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
Any used vehicle I buy, when changing fluids, I will usually pull the plugs to look at them.
Original post Read captured discussion
Spark Plug Replacement

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.

6 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: 20261027T000231Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi, I have a C4S where according to its history, the previous owner had new spark plugs installed at 140 000 KM. This was done about 7 years ago. The car has been driven 25 000 KM since then. I haven't had any misfires, engine light coming up or any errors in the diagnositics. It is a bit sluggish when I kickdown (I have a tiptronic) but then again I am not sure if its normal that there is a slight lag. I read a lot of different things about the frequency at which one should change the plugs. Curious to know what your experiences are and general practice. Thanks!

POST 2Original post

Here you go. Old 2006 996 service schedule says every 30k miles. While you are in their consider doing the ignition coils and fuel injectors as well.

POST 3Original post

My planned change out is 50K miles. 80K km. This is if everything is running well. Any used vehicle I buy, when changing fluids, I will usually pull the plugs to look at them. The burn pattern will tell you many things. Uniformity, rich, lean, oil consumption. Also, look at the coils. If they haven't been replaced they will likely have some cracks in the cases, which will create problems at some point. No comments on sluggishness.

POST 4Original post

You probably won�t notice any change by swapping those plugs out. You can still do it, but just saying, the car probably will run the same.

POST 5 / ORIGINAL POSTEROriginal post

Thanks for the info folks! Very helpful!

POST 6Original post

I replaced mine at 40k (miles) but only as a "while in there" for a coil pack/tube replacement. As Mike Murphy mentioned, you probably won't see a big difference. What my 40k factory Bosch plugs looked like before their Beru replacements.

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