Mobarez Main Battle Tank (Chieftain MBT Upgrade)
***The Following is a Modified Excerpt from "Iranian Military Capability 2011"***
While the Chieftain is theoretically one of Iran's more powerful tanks, it's reputation is far from perfect, particularly with regard to the power pack. The engine is notoriously underpowered and has a tendency to overheat in the hot desert air.
These issues were addressed in the Mobarez upgrade program. While specifics are not known, its features include a newer, more robust fuel tank, new gearbox, upgraded suspension, a new engine and increased armor. Upgrades to the 120 mm gun include night-vision and a laser range finder, complete with an electrical generator power supply.
Assessing these claims verifies most of them; the engine compartment is noticeably larger, though the armor appears to be largely unchanged, with a slightly redesigned hull due to the larger engine compartment. There is also a new laser range-finger located on the right hand side of the turret above the smoke discharger's.