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

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.