De ce que j'ai compris, seul l'échec au Bog Check met fin à la MPH :
D8.21 BOG CHECK: If a Final Bog Check DR is ≥ 12, the vehicle bogs, is marked with a Bog counter, and must end its MPh immediately
Sinon :
D5.5 IMMOBILIZATION TC: An immediate TC is required of the non-Shocked, non-Stunned Inherent crew of a vehicle [...] that becomes immobilized by any non-CC attack [...].
If the TC is passed, the crew may continue to Inherently man it or may abandon it voluntarily (5.41) during its MPh.