In automotive embedded systems, reliability ensures that critical functions such as engine control, braking, and airbag deployment operate consistently and predictably. Drivers rely on these systems to function correctly under various driving conditions to ensure vehicle safety and performance. The reliability of automobile engines differ extremely depending on certain factors. Namely, these factors are related to the vehicle's age, how often it's repaired along with whether it's had early failure or not (Wang et al., 2018) 

Many embedded systems in cars are safety-critical, meaning that failures could result in accidents or injuries. For example, the anti-lock braking system (ABS) system rely on reliable embedded systems to prevent skidding and maintain vehicle stability during braking and cornering manoeuvres. ABS has statistically been proven to reduce the amount of car crashes. Notably, there has been significant reduction in crashes involving pedestrians, cyclists and animals along with collisions involving turning vehicles (Anti-Lock Braking Systems in Cars (ABS), n.d.)

Cars are expected to provide reliable performance over their lifespan, which may span many years and thousands of miles of driving. Embedded systems must be designed to withstand the rigors of daily use and remain reliable over time, without succumbing to wear and tear or degradation.