The M9R 2.0L diesel engine, as used by Nissan, Renault and Vauxhall, has deep seated injectors that are often difficult to remove. The Laser 8504 works in the same way as the original manufacturers tool using a small but robust threaded puller design. The kit includes 2 force screws with different threads, allowing the kit to work with both the piezo and solenoid style injectors used on these engines. Note: these injectors can be very tight and therefore require significant lubrication with a release agent to get them to move. Where possible run the engine up to temperature before attempting removal of injectors.