1.3L i-DSI lean-burn internal-combustion engine with VTEC Cylinder Cut-off System, which allows up to three cylinders to cease operation during deceleration. This decreases friction losses generated by engine aspiration and allows more effective renegeneration of energy.
15 kW (13.4 hp) brushless, permanent magnet assist motor, which functions as a generator during deceleration and loads batteries
The Civic Hybrid's engine won the International Engine of the Year "1 liter to 1.4 liter" size category award for three years straight from 2002 through 2004 as well as the "Best Fuel Economy" category for 2003 and 2004.