The phrase "reliability record" refers to the history or track record of how dependable or trustworthy something or someone has been. It indicates how consistently they have performed without failing or causing problems. Full definition
The flat - plane V8 shows an impressive reliability record and is wholly issue free. (evo.co.uk)
Plus, it has a great reliability record and holds its value better than most rivals. (drivemag.com)
«We've had a remarkable reliability record in endurance races and the engine guys have no reason to hang their heads,» said Fellows. (corvetteracing.com)