Name:  Easy to Maintain
Type:     Positive
Cost:  One (1)
Available To:  BattleMechs
Reference:  BattleMech Manual (p. 83)

Description:
Some ’Mechs, such as the Thorn, are easier to maintain and repair. All maintenance, repair, and replacement rolls made for a ’Mech with this quirk receive a –1 Target Number modifier.

This is an innate quality to the ’Mech, regardless of whether enough spare parts are available to actually fix it. As such, the Vindicator doesn’t gain this quirk just because its spare parts are plentiful (and the Assassin has it despite the fact that its custom spare parts are rare).