fullymatted.
Back to search
Rennlist

MAS and filter replacement

Add to repair workspace
Open repair workspace
Original source
6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHMAS and filter replacement

Leading reported evidence

Use carb cleaner, gunk, alcohol and electrtonic spray cleaner

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

I have used carb cleaner, GUNK, alcohol and electrtonic spray cleaner.

MAS and filter replacement
Frequently discussed work

Clean mass air flow sensor

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

I remember you posted something on Renntech about how to clean it...but I couldn't find it when I did a search...whats the best way to clean the MAF sensor?

MAS and filter replacement
Read full discussion summary

Leading evidence: 'Use carb cleaner, gunk, alcohol and electrtonic spray cleaner' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean mass air flow sensor' (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.

Read captured replies

1 matching discussions · 6 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Use just about everything and they all seem

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

I have used just about everything and they all seem to work.

MAS and filter replacement

Clean mass air flow sensor

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

I remember you posted something on Renntech about how to clean it...but I couldn't find it when I did a search...whats the best way to clean the MAF sensor?

MAS and filter replacement

Replace air filter now

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

Do I really need to change the MAS and air filter at the same time, according to the dealer, or can I change the air filter now?

MAS and filter replacement

Replace maf sensor and oil all is well since

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

After replacing MAF sensor and oil all is well since.

MAS and filter replacement
Frequently discussed actions (10)

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

Clean mass air flow sensor

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

I remember you posted something on Renntech about how to clean it...but I couldn't find it when I did a search...whats the best way to clean the MAF sensor?

MAS and filter replacement

Replace air filter now

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

Do I really need to change the MAS and air filter at the same time, according to the dealer, or can I change the air filter now?

MAS and filter replacement

Replace maf sensor and oil all is well since

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

After replacing MAF sensor and oil all is well since.

MAS and filter replacement

Replace maf'

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

'oh, you need to replace the MAF'

MAS and filter replacement

Replace mas and air filter at the same time, according

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

Do I really need to change the MAS and air filter at the same time, according to the dealer, or can I change the air filter now?

MAS and filter replacement

Replace mas covered--i can't seem

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

Where in the service manual is changing the MAS covered--I can't seem to find it anywhere?

MAS and filter replacement

Replace oil and normally

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

I clean it everytime I change the oil and normally use the electronic cleaner.

MAS and filter replacement

Reset cel and so far

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

They reset the CEL and so far, it made the trip home without going on again.

MAS and filter replacement

Use carb cleaner, gunk, alcohol and electrtonic spray cleaner

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

I have used carb cleaner, GUNK, alcohol and electrtonic spray cleaner.

MAS and filter replacement

Use electronic cleaner

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

I clean it everytime I change the oil and normally use the electronic cleaner.

MAS and filter 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: 20261027T053112Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Ever the optimist, I took my 2001 996 cab with 17K miles to my local dealer for it's "low mileage annual." Which is a way to sell you an oil change and inspection for $349. My main motivation was the fact the CEL was on. Dealer said it needed a new Mass Air Sensor and air filter, for over $400 dollars in parts and another hour of labor which is another $120. I said thanks but no thanks. They reset the CEL and so far, it made the trip home without going on again. I read the Rennlists posts and now feel comfortable driving the car as is. But in the long run, if the MAS is bad, I would like to know: Is this as simple a replacement as I think it is? Anything I need to know? Do I really need to change the MAS and air filter at the same time, according to the dealer, or can I change the air filter now? Where in the service manual is changing the MAS covered--I can't seem to find it anywhere? Any advice on buying the MAS without having to pay full Porsche list price? Thanks. Rennlist is the next best thing to driving a Porsche!

POST 3Original post

Jim... I remember you posted something on Renntech about how to clean it...but I couldn't find it when I did a search...whats the best way to clean the MAF sensor? Is it something that should be done routinely?

POST 4Original post

I have used just about everything and they all seem to work. I have used carb cleaner, GUNK, alcohol and electrtonic spray cleaner. I clean it everytime I change the oil and normally use the electronic cleaner. I also clean it after a few days of oiling my K&N filter.

POST 5Original post

After a major service on my boxster the CEL came on a week later. Took it back to the dealer 'oh, you need to replace the MAF' got them to put an air hose in there and half a tree's worth of leaves came out job done

POST 6Original post

When my MAF sensor went bad under warrenty it caused car to run rich. Later oil analysys showed fuel in the oil. After replacing MAF sensor and oil all is well since. If I ever have another problem I will defineatly try cleaning it since car is now well out of warrenty.

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