The First. The Original. The IMS Retrofit.

Free 30-day IMS tool rental including RMS rear main seal installation tool is now included with purchase of IMS Retrofit and IMS Solution kits from LN Engineering! Be sure to review the terms and conditions for IMS tool rental before placing your order.

The IMS Retrofit is a registered trademark of LN Engineering LLC and the original ceramic hybrid ball-bearing replacement for the M96/M97 engine.

Problem: IMS Failure. Solution: IMS Retrofit.

Why buy an IMS Retrofit from LN Engineering?

As of 2020, with 35,000 IMS Retrofit and 3000 IMS Solutions installed since 2008, our IMS bearing replacements are the most trusted and used by hundreds of independent mechanics and dealerships worldwide.

LN Engineering offers fast and free shipping and has industry leading technical support. We also an IMS bearing replacement tool rental program, available exclusively to retail customers who purchase their IMS Retrofit or IMS Solution from the LN Engineering website.

Why do IMS bearings fail?

• Lack of lubrication as a sealed bearing was used by the factory. The IMS is submerged in engine oil, so elimination of the grease seal allows proper lubrication of the new bearing. No forced oiling is required!
• Insufficient load capacity. The factory single row bearing had high failure rate of 8% according to the Eisen class action lawsuit compared to the factory dual row's 1% failure rate under warranty.
• The factory did not supply a service interval, replacement, or tools and procedure for changing the original bearing out. The original bearing should have had a service interval!
• The Classic Dual Row IMS Retrofit has a 6 year or 75,000 mile service interval, whichever comes first.

IMS Retrofit as a preventative maintenance:

• IMS replacement takes an average of 10-14 hours and requires the transmission to be removed. Tipronic 911 models require the engine and transmission to be removed as a complete unit to be able to separate engine and gearbox.
• Typically coupled with clutch and other maintenance such as replacement of RMS, AOS, Water Pump, Dual Mass Flywheel, etc.
• If an engine failure occurs, rebuilds take 60+ hours and can cost tens of thousands of dollars to fix. Once the IMS bearing has started to fail, it cannot be replaced safely as wear metal from the original bearing can damage the replacement bearing or other internal engine components.
• Engines must be pre-qualified prior to bearing replacement. To learn more about pre-qualification, visit https://lnengineering.com/products/ims-bearing-installation-tools/ims-pre-qualification.html

What is involved in replacing the intermediate shaft bearing?

In this video, Bentley Publishers technical editor Nick Czerula and Rick Mikhail from Callas Rennsport show how to replace the Intermediate shaft (IMS) bearing on a Porsche 911 (996) using an IMS Retrofit. Please refer to the instructions provided for the particlar kit to be installed for specifics. This video covering the removal and installation of the intermediate shaft (IMS) bearing is provided by Bentley Publishers. For more information on Bentley Publishers line of Porsche technical manuals, visit http://www.bentleypublishers.com/

Download Classic Dual Row IMS Retrofit Installation Instructions.

What factory bearing does my engine have?

• 1997-1999: This engine featured a dual row bearing IMS.
• 2000-2001: These engines came from the factory with either a dual row or a single row bearing IMS. A single row flange measures 19.27mm deep and a dual row flange measures 13.34mm deep.
• 2002-2005: This engine featured a single row bearing IMS. Some late production 2005 models will have a non-servicable IMS.
• 2006-2008: These engines were fitted with a larger bearing, readiliy identifiable by the 22mm center nut, that is not serviceable without a complete teardown of the engine. Removal of the IMS bearing grease seal will ensure proper lubrication of the original bearing.
• If the engine in your car has been replaced, it will have whatever IMS bearing was in production for that model year of manufacture for the replacement engine.

All other bearing replacements are just imitations.

All genuine LN IMS Retrofit kits come laser etched, engraved, and serial numbered to validate their authenticity and feature custom-made, ceramic hybrid ball bearings made exclusively for LN Engineering. When it comes time to buy or sell your Boxster or 911, buyers and sellers both recognize the LN Engineering IMS Retrofit and IMS Solution as the first and original IMS bearing replacement for Porsche 986 Boxster and 996 911 models. LN Engineering maintains a database of all bearings sold and installations that are registered. Verify your installation at https://imsretrofit.com/ims-check/.

2 YEAR / 24,000 MI LIMITED WARRANTY

Warranty requires registration and compliance with program requirements. For more information and application guidelines please visit IMS Retrofit website

Make sure you have proper tools for installation!

This product requires: 106-08.13 IMS Pro Tool Kit

Visit IMS Retrofit Installation Tools for more information on the tools required to carry out the IMS Retrofit procedure.

Note: Free basic technical support is provided through our ticketing system. Assistance with the IMS procedure is not provided outside of directives and videos provided online. Advanced Technical Support (ATS) is a paid service where you can speak to an actual technician experienced with the IMS procedure and your vehicle to assist in case you run into a problem you cannot solve on your own.

Need to have someone install your IMS bearing?

If you aren't a do it yourselfer and are planning on having your IMS bearing changed professionally, we recommend checking out Certified Installers as your first resource for this work to be completed. We do not recommend purchasing an IMS Retrofit or IMS Solution intermediate shaft bearing kit from us unless you are doing the work yourself or the shop you are planning on using explicitly asks you to supply the parts. Most shops do not allow customers to bring in their own parts; shops need to make money on both the parts and labor to stay in business, so please purchase your LN products from the shop that is doing the work on your Boxster, Cayman, or 911 to support your local independent Porsche mechanic.

THE PATENTED IMS SOLUTION IS THE ONLY TRULY PERMANENT SOLUTION TO PORSCHE IMS BEARING FAILURES.

NO MOVING PARTS. NO BALL OR ROLLER BEARING. NO SERVICE INTERVAL. NO PROBLEM.
THE IMS SOLUTION IS DESIGNED FOR THE LIFE OF THE ENGINE WITH A 5 YEAR /UNLIMITED MILEAGE WARRANTY.

Free 30-day IMS tool rental including RMS rear main seal installation tool is now included with purchase of IMS Retrofit and IMS Solution kits from LN Engineering! Be sure to review the terms and conditions for IMS tool rental before placing your order.

Prevent costly engine failure by eliminating problematic ball-bearings or roller-bearings by backdating your IMS with a permanent, pressure fed oil lubricated plain bearing, just like in an aircooled Porsche. This patented design is the last IMS bearing you will ever need. Brought to you by the team that developed the original and often imitated IMS Retrofit™, the IMS Solution is the only permanent solution to catastrophic IMS bearing failures by complete omission of the problematic single row ball bearing and now the dual row ball bearing.

The IMS Solution became the first Patented IMS Retroit product on the market, granted US Patent 8,992,089 B2 on March 31, 2015. The IMS Solution is also protected by US Patent 9,416,697 B2 and US Patent 9,909,469.

Why buy an IMS Retrofit from LN Engineering?

As of 2020, with 35,000 IMS Retrofit and 3000 IMS Solutions installed since 2008, our IMS bearing replacements are the most trusted and used by hundreds of independent mechanics and dealerships worldwide.

LN Engineering offers fast and free shipping and has industry leading technical support. We also an IMS bearing replacement tool rental program, available exclusively to retail customers who purchase their IMS Retrofit or IMS Solution from the LN Engineering website.

IMS Solution as preventative maintenance:

• IMS replacement takes an average of 10-14 hours and requires the transmission to be removed. Tipronic 911 models require the engine and transmission to be removed as a complete unit to be able to separate engine and gearbox.
• Typically coupled with clutch and other maintenance such as replacement of RMS, AOS, Water Pump, Dual Mass Flywheel, etc.
• If an engine failure occurs, rebuilds take 60+ hours and can cost tens of thousands of dollars to fix. Once the IMS bearing has started to fail, it cannot be replaced safely as wear metal from the original bearing can damage the replacement bearing or other internal engine components.
• Engines must be pre-qualified prior to bearing replacement. To learn more about pre-qualification, visit https://lnengineering.com/products/ims-bearing-installation-tools/ims-pre-qualification.html

How do you install the IMS Solution?

 Download IMS Solution Installation Manual

What factory bearing does my engine have?

• 1997-1999: This engine featured a dual row bearing IMS.
• 2000-2001: These engines came from the factory with either a dual row or a single row bearing IMS. A single row flange measures 19.27mm deep and a dual row flange measures 13.34mm deep.
• 2002-2005: This engine featured a single row bearing IMS. Some late production 2005 models will have a non-servicable IMS.
• 2006-2008: These engines were fitted with a larger bearing, readiliy identifiable by the 22mm center nut, that is not serviceable without a complete teardown of the engine. Removal of the IMS bearing grease seal will ensure proper lubrication of the original bearing.
• If the engine in your car has been replaced, it will have whatever IMS bearing was in production for that model year of manufacture for the replacement engine.

Take advantage of free tool rental when purchasing your IMS Solution from LN Engineering

Note: Free basic technical support is provided through our ticketing system. Assistance with the IMS procedure is not provided outside of directives and videos provided online. Advanced Technical Support (ATS) is a paid service where you can speak to an actual technician experienced with the IMS procedure and your vehicle to assist in case you run into a problem you cannot solve on your own.

Need to have someone install your IMS bearing?

If you aren't a do it yourselfer and are planning on having your IMS bearing changed professionally, we recommend checking out Certified Installers as your first resource for this work to be completed. We do not recommend purchasing an IMS Retrofit or IMS Solution intermediate shaft bearing kit from us unless you are doing the work yourself or the shop you are planning on using explicitly asks you to supply the parts. Most shops do not allow customers to bring in their own parts; shops need to make money on both the parts and labor to stay in business, so please purchase your LN products from the shop that is doing the work on your Boxster, Cayman, or 911 to support your local independent Porsche mechanic.

The RND RS Roller IMS Retrofit is the only IMS bearing replacement kit featuring a cylindrical roller bearing with true integral thrust control.

Cylindrical roller bearings provide great lateral load capacity, sacrificing their maximum load cap in thrust (axial movement). That’s why precise thrust control is crucial for bearing’s longevity and reliability. RND Roller Bearing IMS Retrofit kit is the only solution on the market that uses proper heat treated, 52100 bearing steel thrust surfaces on both sides. Features a genuine Koyo NUP204E or equivalent Genuine FAG, SKF, or NSK bearing. Only the best cylindrical roller bearing we could source for our RS Roller IMS Retrofit Kit. Kit includes the required spacer for installation.

Manufactured by LN Engineering LLC for RND Engines, The RND RS Roller IMS Bearing Replacement sports a 2-year/24,000 miles limited parts warranty with professional installation, proper IMS procedure pre-qualification, and qualifying bearing registration. The RND RS Roller IMS Bearing Replacement has a recommended service interval 6 years or 75,000 miles, whichever comes first.

Why do IMS bearings fail?

• Lack of lubrication (sealed bearing was used)
• Insufficient load capacity (factory single row bearing had high failure rate of 8% according to the Eisen class action lawsuit)
• The factory did not supply a service interval, replacement, or tools for changing the original bearing out – bearing should have had a service interval!

IMS Retrofit as a preventative maintenance:

• IMS replacement takes an average of 10-14 hours.
• Typically coupled with clutch and other maintenance.
• Engine rebuilds take 60+ hours and can cost tens of thousands of dollars.
• Engines must be pre-qualified prior to bearing replacement.

What factory bearing does my engine have?

• 1997-1999: This engine featured a dual row bearing IMS
• 2000-2001: These engines came from the factory with either a dual row or a single row bearing IMS
• 2002-2005: This engine featured a single row bearing IMS. Some late production 2005 models will have a non-servicable IMS.
• 2006-2008: These engines were fitted with a larger bearing that is not serviceable without a complete teardown of the engine.
• If the engine in your car has been replaced, it will have whatever IMS bearing was in production for that model year of manufacture for the replacement engine.

Use IMS Pro Toolkit part number 106-08.13 for installation. No oil system modifications required!

Download Instructions and Warranty form (150kB). If your browser doesn't support online form filling, please right click this link and save the form to your computer as a PDF file.

Download Installation Manual from RND Engines website.

Note: Free basic technical support is provided through our ticketing system. Assistance with the IMS procedure is not provided outside of directives and videos provided online. Advanced Technical Support (ATS) is a paid service where you can speak to an actual technician experienced with the IMS procedure and your vehicle to assist in case you run into a problem you cannot solve on your own.

Need to have someone install your IMS bearing?

If you aren't a do it yourselfer and are planning on having your IMS bearing changed professionally, we recommend checking out Certified Installers as your first resource for this work to be completed. We do not recommend purchasing an IMS Retrofit or IMS Solution intermediate shaft bearing kit from us unless you are doing the work yourself or the shop you are planning on using explicitly asks you to supply the parts. Most shops do not allow customers to bring in their own parts; shops need to make money on both the parts and labor to stay in business, so please purchase your LN products from the shop that is doing the work on your Boxster, Cayman, or 911 to support your local independent Porsche mechanic.