When disabled, vehicle movement, weaponry, or other functions are unavailable for various reasons. Low-flying air vehicles that are disabled are likely to crash to the ground. However, limited use of a vehicle is available until it is actually destroyed.
Vehicles or emplacements with very low health (about 20%) will catch fire, eventually being destroyed and killing any occupants and nearby soldiers. The health loss caused by fire is usually more than can be regained using a repair tool. A klaxon will sound to urge occupants to bail out. Most or all vehicle functions are still available up to the point where the vehicle is destroyed. Air vehicles may have a higher tolerance for fire, losing health at a lower threshold.
The DysTek Repair v2.0 can provide enough additional repair rate to spare a vehicle from fire and recover it to an operational state.
In Battlefield 3, vehicles that are reduced to a certain percentage of health will become disabled, having compromised movement and control. They also catch fire and will burn until reaching 0% health and exploding, unless repaired by an Engineer or by specializations such as an Extinguisher. The disabled vehicle must be fully repaired, otherwise it will soon catch fire again.
For most land vehicles, this threshold is at 50%, while air vehicles will not catch fire until ~30% health remaining.
Disabling in Battlefield 4 works somewhat similarly to past titles, with a disabled vehicle losing power and burning out until it is destroyed. However, most vehicles will not catch fire until 10% health remaining, a drastic reduction from Battlefield 3.
The Disable concept is largely supplanted by the new Mobility Kill feature, in which damage to vehicles will impair its movement without catching it afire.
Disabling returns in Battlefield Hardline, similar to past titles. Any vehicle becomes disabled and will catch fire upon being reduced to ≤20% status. It will become immobile and its hit points will quickly drain. The vehicle can be saved by use of the Repair Tool, or by activating the optional Fire Extinguisher.