The phrase "rear footwell" refers to the space on the floor of a vehicle located behind the back seats where passengers can place their feet. Full definition
These include even softer Napa leather upholstery, power - adjustable front seats, a 12.3 - inch «virtual» display (instead of the traditional dials), 18 - inch alloy wheels, keyless entry, walnut interior trim and rear footwell illumination. (carbuyer.co.uk)
With an added 5.9 inches in the wheelbase, the Porsche Panamera Turbo S Executive adds plenty more space and comfort for rear passengers, including 4.7 more inches in the rear footwell. (automobilemag.com)
My roll - on bag was relegated to the rear seat, and the rear footwells were filled with briefcases, backpacks, and the like. (automobilemag.com)