Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

How do I check my model Boxster does not need IMS.

Recommended Posts

Hi to all


Spoke to Cath today in Wigan, North West Porsche ...

discussing my 987 2005 Boxster.


My concern is the IMS I am hoping that mine will not need to be repaired and that it is the model that is safe and will not fail.

there is no noise as some people say there is, apparently the IMS just fails.


Is there a way of checking for instance the VIN number, or is it in the shop to be checked over.


Hope someone can give some direction.


Mike ...

Edited by PB987
Link to comment
Share on other sites

  • Moderators

2005 was a transitional year for the M96/97 engine's IMS bearing.  Some of the cars carry the single row serviceable (read can be changed without disassembling the engine or even removing it from the car), while other carry the oversized non serviceable (read the engine must be disassembled to retrofit it) bearing.   The car's with the serviceable bearings carry the single row bearing, which has the highest failure rates percentage wise, cars with the non serviceable large bearing have a low failure rate, but are still known to fail.  In reality, any M96/97 engine with a factory IMS bearing has some probability of IMS failure, but some are more prone than others with the  2001-2005 single row's being the worst.


Unfortunately, the only proven method to know which bearing is in the engine it to pull the gear box, clutch, and flywheel, and look at the IMS bearing flange center bolt.  No other methods (VIN, build date, engine number, etc.) have proven even remotely reliable.  The oversized non serviceable bearing used a 22 MM center bolt and was the only one to use that size, so it is easily recognizable once it is uncovered.

Link to comment
Share on other sites

  • Moderators

Many Thanks for the prompt reply ... 

Mine is 55 plate auto/tiptronic 


looks like it needs to go in just to be certain ...


Thanks again ...


Mike ... UK ...


Just remember that if the car turns out to be the 22MM center bolt, you can still them remove the rear seal on the IMS bearing so that it is lubricated by the oil mist inside the engine.  While not a perfect solution, it does seem to improve the longevity of the oversized IMS bearings,

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.