17 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH2002 996 AOS problems
Leading reported evidence
Install ones
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
The factory AOS & the �ro AOS are known to fail, even recently installed ones.
Leading evidence: 'Install ones' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check into it' (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.
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
It is a well tested OEM diaphragm used by VW/Audi.
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.
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
It is a well tested OEM diaphragm used by VW/Audi.
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.
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.
17 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: 20261026T200546Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I have replaced my air/oil separator twice so far and the new one just went bad again both times the replacement part lasted only a week
I used an aftermarket URO brand part! How is this possible my car just passed CA smog test the other day so I don't think I have an engine problem
or do I however this time I'm using an OEM part! Does anyone know why it's doing this or is the URO brand just plain crap?
The factory AOS & the �ro AOS are known to fail, even recently installed ones.
Go with the UAOS, and never spend time/money replacing it again!
The part that fails(diaphragm) is located in an easily accessible location on the UAOS.
Buy a UAOS here:
https://rennlist.com/forums/market/1...highlight=UAOS
are they still in business? The link for UAOS in the rennlist thread is dead (404). I also can't find them by doing a search.
Seems like the stock one is a possibility. How long can one expect a stock AOS to last after installing? Mine doesn't smoke at this time, but I know it's in my future. Hoping I can wait until I need to drop the engine for a IMS and do everything at once.
Thx!
Yes,
@Porschetech3
is definitely still in business.
The link in the ad is broken, use this one:
https://ultimateaos.com/
The diaphragm(flow control) has about the same life expectancy of (or better than) a Porsche\Uro unit.
It is a well tested OEM diaphragm used by VW/Audi.
The first difference is that when a Porsche or Uro unit fails, the entire AOS has to be replaced.
This is VERY labor intensive.
When a UAOS diaphragm fails, it takes about 5 minutes or less to replace.
The second difference is that when a Porsche or Uro unit fails, there is no warning, and an engine is in danger of hydro locking., which can cause catastrophic engine failure.
When a UAOS diaphragm fails, there is an accumulator to prevent hydro locking, and a warning light on the dash to let you know it has failed and the diaphragm needs to be replaced.
The UAOS costs more than a Porsche or Uro AOS, but change it once and never worry about the AOS again.
Hi guys, we sell just over 200 of
URO Parts Oil Separator 996 107 026 51
annually, and have had only two returned as defective in the last 12 months (and those could be a couple years old). Regardless, we asked our engineers to check into it. According to the engineering documents, we're using a silicone diaphragm just like OEM.
If anyone bought one of our units within the last two years and it failed, just send an email with your order confirmation and details to "sales at uro parts dot com" and we'll be happy to set up a warranty exchange.
Thanks guys for helping in the quest to make the m96 a more bullet-proof engine. Scott has reached out to me and I have built him a UAOS kit for his 2002 MT6 car.The UAOS is coming up on its Aniversary and I'm wanting to do something special for the "Rennlisters" to help celebrate the Invention.
Thanks for tuning in, but this issue has been better resolved by a Technically Advanced Re-design of the crankcase system by the UAOS. This issue has plagued the m96 engine for two decades and the OEM and URO alternatives are just not adequate. The UAOS still uses the 996 107 026 51 Polymaide 66 /35% Glass Fiber housing, but eliminates the rubber diaphragm to make it a "lifetime" part, and incorporates an accumulator with Infra-red sensor warning system to stop the threat of Hydrolock, and moves the diaphragm to an easy to access location (but still retains all emission compliance)..
Sorry but I find that hard to believe given I've gone through 2 of them in a month thank God for Skip and his UAOS because the labor involved in replacing
it is such a PITA I would never trust a URO AOS again warranty or not, my money back would be the only warranty I'd be interested in!
I agree that the sub-$200 part that requires $1,500 of labor needs to be more than 99.99% reliable for 20,000+ miles. Money back for the defective part won�t cover the cost of labor, or replace the down time, or compensate the owner for the lost peace of mind. My Porsche boxed AOS p.o.s. (whoever makes OE now) lasted less than 500 miles. For a 996 owner, that is a huge dealbreaker and giant buzz kill. Almost as bad as a 500 mile water pump.
I just sold my boxster the AOS went out when the new owner was driving it home so I gave his money back and had it towed home
the very next day the AOS went out in the 996 the Boxster took a half hour to fix the 996 took like 10hrs both times and now I have
to do it one more time with Skip's UAOS so yeah the warranty on a part like this is useless the 3rd time it fails cause who in their right mind would
use the same brand part.
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