Answer:
1. Perform regular based-on-time or based-on-use inspections and adjustments.
2. Perform regular good quality replacements according to use or/and environment conditions
Explanation:
The best approach to keeping a car in a <em>safe working order</em> is to perform <em>preventive maintenance activities</em> to avoid unexpected failures that could put at risk people in a car. These preventive maintenance activities could be categorized into two groups:
- Regular based-on-time or based-on-use inspections and adjustments.
- Regular good quality replacements.
Those maintenance activities <em>based-on-time</em> (generally, based on days) or<em> based-on-use</em> (according to miles or kilometers) <em>inspections and adjustments</em> include those performed, at least, on main components fluids levels and working conditions of:
- <em>Motor oil</em> level and oil quality conditions.
- <em>Motor coolant system</em> level.
- <em>Braking system</em> liquid level.
- <em>Steering system</em> liquid level.
- Tires pneumatic pressure.
- <em>Oil leakage</em> presence below motor, gears box (manual transmission) or automatic transmission or in front or/and rear axles.
- Condition of <em>shock absorbers</em> (suspension system).
Those maintenance activities based on regular <em>good quality replacements</em> depend on the evaluation of the previous ones and include main components such as:
- Motor oil.
- Spark plugs.
- Oil/Air/Gas filters.
- Headlights and stop lights.
- Battery.
- Tires.
- Brake's pads and brake rotor rectification.
Good quality means replacements that meet <em>quality norms</em> and well-performed maintenance activities.
Again, these are activities that are performed in main and critical components, that is, a failure on them may have a high impact with high consequences (including loss of life) for those inside the car.