The phrase "centre tunnel" refers to a passage or space in the middle of a vehicle's interior. It usually runs between the front seats and is sometimes called a "center console." Full definition
The dashboard, centre console and centre tunnel remind of the CX - 9, while the steering wheel and instrument panel seem to have been borrowed from the CX - 3. (indianautosblog.com)
Three people can sit in comfort at the rear due to low centre tunnel. (motorbeam.com)
Though the cabin is wide enough to accommodate three passengers, a slightly raised centre tunnel and the rear AC vent console curb room for the centre passenger. (cardekho.com)