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IMS Failure Probability

  • 2000
  • 911 Carrera
63 000

I recently purcahsed a 2000 Porsche 996 Carrera. The vehicle has 63,000 miles and has been garage kept for a great portion of its life. From the mileage we can tell it probably wasn't a daily driver. - Prior to purchasing the car, I had a professional Porsche mechanic perform a PPI and everything checked out OK. (Some minor issues, but nothing major.) We also preformed an engine oil test that was sent to a laboratory for inspection and the oil test came back with no (or very minimal) chemical readings for metals (copper, iron, etc.) - hence nothing abnormal. There are no abnormal engine, here's the magic quesiton - given that only about 1% of the IMS bearings in the 996s failed in model year 2000, what is the real likelyhood of mine may fail after 63000 miles?

The reason I ask the quesiton is that I've heard a lot of different schools of thought. Some people say - it was only 1% of the vehicles that failed (as listed on the LN Engineering website for model yeat 2000). Some people say - you'll hear abnormal engine noises. Some people say - you'll see a change in the oil's chemicals makeup. Some people say - most of the bearings that failed did so at low mileage. -- OK, I'm sure that may all be true, but at the end of the day, when I ask professional Porsche mechanics how many of IMS bearings they've seen fail in their careers (BTW, some of these folks have over 30 years of Porsche mechanical expericene) the average answer I've gotten is -- 2, yes two. So, if in 30 year of "professional Porsche mechanic experience", some of these guys have ony seen 2 IMS bearins fail...I have to ask (and I don't think it's a silly question) - what is the actual likelyhood that mine will fail after 63000 miles without any issues?

Does anyone here have any experience with multiple IMS bearing failures? Does anyone here have any experience with vehicles that have high milage and not had any issues? -- Although the IMS bearing issue is a real problem, could much of what we read about on the Internet be more "hype" and uninformed panic than real statistical metrics?

So, back to my question...and I know no one has a crystal ball...but how likely are ALL IMS bearings to fail, as opposed to some "did fail" on low milage vehicles, but even Porsche couldn't identify double digit percentage failure rates.

Insight from those that may have some experience in this subject would be greatly appreciated. -- And again, I know that no one can predict the future of any particular vehicle and that an IMS bearing failure is catistrophic, but how realistic is the chance that it WILL fail, as opposed to some did fail, but not all might fail, which based on statistics, and speaking to professional mechanics, is what its looking like to me.

Best Regards,








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