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IMS bearing failure for your 996, Y or N? tell us (yr, 996 Mk1 or MK2 failure mode)

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IMS bearing failure for your 996, Y or N? tell us (yr, 996 Mk1 or MK2 failure mode)

Old 02-06-2013, 12:33 AM
MiamiC70's Avatar
Join Date: Jul 2010
Location: Miami, FL
Posts: 1,817

2004 40th Anniversary Edition purchased July 2010 with no issues. I proactively installed an LN bearing at 34k miles pre-delivery and car now has 59k and has been problem free.
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Old 02-06-2013, 06:24 AM
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Join Date: May 2012
Location: United Kingdom
Posts: 97

99 C2 6sp Manual
107k Original Engine and all original components within.
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Old 02-06-2013, 01:31 PM
b's 911
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02 C2, 106,000 miles. Replace IMSB with LN Engineering bearing. Original bearing looked OK but didn't want to take the chance.
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Old 02-06-2013, 04:27 PM
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Location: Kittery, Maine
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MY99, 63k miles, no replacement bearing at this time.
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Old 02-06-2013, 04:34 PM
rpm's S2
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Location: Apex, NC
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NO, and with my shiny LN bearing I no longer worry about it!
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Old 02-06-2013, 04:40 PM
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Location: Spring, Texas (The Woodlands)
Posts: 5,129

1999 C2 purchased in 2005 with 55,000 miles, currently has 111,000 miles.
I have no idea if the IMS has ever been changed.
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Old 02-06-2013, 06:35 PM
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Location: SoCal
Posts: 13

2002 MK2. IMSB failed at 80k miles. Replaced with Porsche crate engine. Paid out of pocket.
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Old 02-06-2013, 08:59 PM
Join Date: Feb 2008
Posts: 26

2002 cabrio with 49,959 miles, original engine. hope i don't jinks it!
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Old 02-07-2013, 04:04 PM
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Location: Mayo, Md
Posts: 2
Default 1999 C2

1999 C2 996 with 111,000 miles. Motor replaced at 90k due to cracked cylinder. Porsche Crate motor installed in 2008, 20k miles ago. No problems since.

Mayo, Md
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Old 02-07-2013, 05:33 PM
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Location: Melbourne, Australia
Posts: 4

1998 Coupe DD with almost 189K klm. I'm the third owner, full service history and to my knowledge, IMSB has not been changed.
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Old 02-07-2013, 07:57 PM
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Location: Glendale CA
Posts: 962

2003 C2 996 with 62K miles on original bearing and still no issues. Hope to keep it that way
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Old 02-08-2013, 02:25 AM
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Join Date: May 2012
Location: Vancouver Island, BC
Posts: 483

2000 C2 with 142k kms, New RMS & clutch et al, in 2010 but left IMSB as is then, as it was not believed to be an issue by previous owner/well-reputed Indy at the time.
Assumed to be a dual row IMSB (early 99 fall production: # ...0220) and still doing well w/out leaks (fingers crossed).
No immediate plan to replace with LN.
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Old 02-08-2013, 01:30 PM
fanny bay r1
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Join Date: Jan 2012
Location: Fanny Bay, BC, Canada
Posts: 1,038

02 C2 Cab - 62K kms still with original IMSB (no issues to date knock on wood) - plan to install the LN bearing (not the permanent solution - too pricey) at the first opportune moment (clutch, RMS leaking or whatever might come up). Until that point I'm not remotely concerned as the failure rate is far too low to be concerned!!

I also have to comment on statement on page one that due to data corrupting these types of ad hoc surveys that perhaps these types of surveys should be restricted to "renlist members". I have no idea why so many guys on this forum feel that is someone pays $18 his or her opinion is that much better than a "user". Absolute rubbish and you continually commenting "members" need to get over yourselves!!!

Last edited by fanny bay r1; 02-08-2013 at 02:47 PM.
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Old 02-08-2013, 01:57 PM
Dennis C
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Location: Evergreen, Colorado
Posts: 14,393

~121K miles on my C4S on my original bearing. I had my RMS and my intermediate shaft seal replaced at ~74K miles.
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Old 02-08-2013, 04:20 PM
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Join Date: Nov 2010
Location: Spring TX
Posts: 675

2001, Dual row IMSB, but preemptively replaced with LN ceramic at 49,500 miles.

Original motor, not a replacement.
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