Toyota 2009 4runner Owner's Manual page 233

Seating configuration variation
If removing the third seat, it is possible to load extra cargo equal to
the weight of the removed seats.
(Cargo capacity) = (Total load capacity) − (Total weight of occupants)
+ (Weight of the removed third seats)
Third seat weight:
Each seat 24 lb. (11 kg)
2-5. Driving information
Cargo capacity
Weight of removed third seat
2
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