Variable Cylinder Management (VCM) is Honda's term for its variable displacement technology, which saves fuel by deactivating the rear bank of 3 cylinders during specific driving conditions—for example, highway driving. It was first introduced in the 2005 Honda Odyssey minivan. The second version of VCM (VCM-2) took this a step further, allowing the engine to go from 6 cylinders, down to 4 or 3 during cruising and deceleration. This version had an "ECO" indicator light on the dashboard. The most recent version of VCM (VCM-3) reverted to the previous 3- and 6-cylinder operation.