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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHSecondary Air Injection Pump - Buy Chinese or (?)
Reported or suspected cause
lubrication in the two bearings
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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Discussions that report identifying a cause
1
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Reported cause
They are scttered so to help others I linked some of the better ones below.I found the issue is lubrication in the two bearings.
Leading evidence: 'lubrication in the two bearings' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'lubrication in the two bearings' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check 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.
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Use instead of the the very similar $200 porsche part
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Performed · outcome unconfirmed
The link above shows a $45 Mercedes change over valve being used instead of the the very similar $200 Porsche part
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
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Suspected cause
If the issue is just bearings ,it is easy but there are some difficulties in going further.
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Suggestion
If your pump blows, maybe check the sensor which causes the code to pop up?
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.
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Suggestion · Original poster
I removed the pump and cleaned/lubed it very well (I originally heard a squeaking noise from within AIP case - Rennlist posts suggested a good cleaning/lube first.).
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Suggestion · Original poster
I removed the pump and cleaned/lubed it very well (I originally heard a squeaking noise from within AIP case - Rennlist posts suggested a good cleaning/lube first.).
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
That entailed ordering a new $70 hose (which took a week to get here), draining all the coolant from the engine, replacing the hose that is a bear to get in there because it is a three-way coolant hose, and refilling the coolant.
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.
26 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: 20261026T124918Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Thanks, in advance, for your advice...
Question: Any experience/luck with the Chinese (eBay) AIPs?
Like:
https://www.ebay.com/itm/282332130476
[I would also note that the OEM (Almighty
, EXPENSIVE "BOSCH") looks/feels VERY cheap - mucho plastic (again, CHEAP!)...sad.]
Problem: Original AIP evidently causing CELs (two most commonly associated with AIP). I removed the pump and cleaned/lubed it very well (I originally heard a squeaking noise from within AIP case - Rennlist posts suggested a good cleaning/lube first.). It (seemingly) runs well - no noise. But, every few weeks or so, the same codes pop back up. I just clear them and move on. I do suspect the pump is just getting too old - worn (57,000 miles + years).
Thoughts?
Thanks -
Yeah - wish I could buy AMERICAN (make no doubt!) - can I?
No air flow test - stupid me. But, it does seem to run well to my ear - just no empirical data (like a "butt" dyno, I guess? : ) )
Codes: 1411, for sure - and 410?
You can just disconnect the air hose between the pump and the combo valve. Supply power to the pump and feel for air (make sure you get the polarity correct otherwise the pump will be sucking instead of blowing). If it's strong, you need to diagnose it further downstream. Could be the changeover valve or the vacuum valve.
See here for more info https://www.renntech.org/forums/topic/10184-cel-p0410-p1411/
Get a Bosch for around $200 with a little searching?
https://www.amazon.com/gp/offer-list...&condition=new
580 000 023
Listed as BOSCH Secondary Air Smog Pump Fits AUDI A6 C5 2.7L 2000-2005
Or in Porsche packaging for Your Special Price $ 1800.52
http://www.porscheatlantaperimeterpa...sche_StockCode
Ahsai,
Great ,simple testing suggestions.Thank you
Question - which component ,downstream of the SAI pump detects air flow created by the pump? The vacuum operated change over valve ?
I have my SAI pump dismantled now. There are some useful diy guides on the forums. They are scttered so to help others I linked some of the better ones below.I found the issue is lubrication in the two bearings. The motor face plate is 'staked' on to the body so separating it to access/replace the rear bearing is an issue.
You may recognize the this:
https://rennlist.com/forums/996-foru...not-ready.html
Here is a rebuild link for an Audi - same pump
http://www.audiworld.com/forums/a6-s...1727056/page2/
http://986forum.com/forums/performan...placement.html
Here is a system description:
https://www.renntech.org/forums/topi.../?_fromLogin=1
This may help?
http://p-car.com/996/diy/sai/mainpage.html
http://986forum.com/forums/general-d...ctor-pump.html
http://986forum.com/forums/performan...ns-needed.html
The Bosch motor is also found on Mazda:
https://rennlist.com/forums/993-foru...eck-valve.html
And Mercedes:
http://mbworld.org/forums/c32-amg-c5...-pump-fix.html
The link above shows a $45 Mercedes change over valve being used instead of the the very similar $200 Porsche part
The brutal approach:
https://rennlist.com/forums/993-foru...eck-valve.html
Great link to the Bosch -Amazon SAI for $200.Thank you fpb
https://www.amazon.com/gp/offer-list...iglink20410-20
Be aware that many Bosch products are made outside Germany.But at least you have a chance of recourse if there is a problem through Amazon. Ebay would be riskier in my experience.
I hope others will add helpful links to this Thread so that other SAI problem chasers in future will be assisted.
If you get Bosch or other you will probably have to save your Porsche mounting bracket and isolation mounts. The mounts have threads on both ends. Pretty easy swap.
Thanks guys. I'll pull the plug on the SAI later with cold start to confirm that's the source of the whining. I really hope it's not something else that'll require me to move the alternator.
Even better. The first time I heard it, I actually thought it was a saw going off at a neighbors house (though my guess was circular saw). Seemed very coincidental that they only used it when my car was cold starting.
It's a really easy part to replace. If I were you I would buy a quality used OEM part that comes with a warranty. They were used on the Boxster and 911 so are all over the internet at about 1/10th of the price of anything new... If it goes in a year or two, buy another one and you are still ahead. Try DCauto.com or ebay.
Is there a write up on how to remove/replace the pump? My new one is arriving today. Could not take the noise any longer and ordered a new Bosch unit for $297. Thx.
Two bolts hold the SAI pump on the bottom bracket and they are pretty obvious. Then there is a nut on the upper part of the bracket. Then lift the pump and undo the electrical connector. Good idea to have a towel in the engine bay to rest it on. Now for some advice, pull the SAI pump and then undo the clamp/hose that is connected to it. I thought it would be easier to undo the clamp/hose while it was still in place, and ended up breaking a plastic nipple on a coolant hose that is right underneath the SAI hose. That entailed ordering a new $70 hose (which took a week to get here), draining all the coolant from the engine, replacing the hose that is a bear to get in there because it is a three-way coolant hose, and refilling the coolant.
This is what I'm talking about. The SAI pump hose is on the top. And the black plastic part of the coolant hose has a nipple about 1.5 inches long (mine is broken off) and it is right under the SAI hose.
20 minute job and no longer sounds like a table saw! Cannot believe Porsche sells the Bosch pump for $1800 but you can buy the exact same Bosch pump elsewhere for $300!
But I don't feel like I saved $1500!
The other option may be to repair the SAI pump. There are a few DIY threads that cover this. If the issue is just bearings ,it is easy but there are some difficulties in going further.
This is a source reference. Confirm exact model applicability in the original material.
