Abstract: A seat mounting system for a removable motor vehicle seat. The mounting system incorporates a pair of seat mounting latch assemblies laterally displaced at the rear of the vehicle seat and which engage with mounting bars secured to the motor vehicle structure. One of the seat mounting latches features a manually actuated mechanism for engaging the mounting bar. On the opposite lateral side of the seat, an inertia sensitive seat mounting latch is provided which engages the locking bar when a forward deceleration force is applied onto the vehicle as in the case of vehicle impact. By providing one of the latching mechanisms with an automatically operating inertia mechanism, only one of the latch mounts needs to have a manually actuated release. In addition, this configuration avoids the requirement of remote actuation of a pair of separated latches. The manual actuated mechanism of this invention also has means for cinching against the mounting bar to reduce seat rattling.