Purpose of car maintenance
A car has thousands of moving parts. They rub, heat up and get dirty. Maintenance has four goals:
- Safety: brakes, tyres and steering must work every time.
- Reliability: the car should not break down on the way.
- Low cost: small care now avoids big repairs later.
- Clean air: a well-tuned engine gives less harmful exhaust.
What maintenance includes
There are three kinds of work:
- Daily (pre-trip) check: done by the driver. Look at tyres, lights, oil, coolant and warning lamps.
- Periodic service (preventive): done at fixed distance or time. Change oil and filters, check brakes, belts, battery and fluids.
- Repair (corrective): done after something fails or a fault is found. Replace the broken part.
A service record book lists what was done and when. A periodic inspection is a legal test by an approved centre, which checks brakes, lights, steering, tyres, body and exhaust.
Laws about car maintenance
Rules differ from country to country, but the ideas are very similar:
- The owner must keep the car roadworthy: safe parts, working lights, legal tyres.
- The car must have a valid registration, insurance and, where required, a pollution certificate.
- It must pass a periodic inspection; new cars often get a few years before the first test.
- Changes to the car (bigger engine, louder exhaust, extra lights) are allowed only within rules and may need approval.
- Used oil, batteries, tyres and coolant are waste. Laws say they must go to approved recyclers, not drains or open ground.
- Driving an unfit car can bring a fine, a ban on use, and blame in an accident.
Check your own country's transport office for exact periods and fees.
Garages and mechanics
A maintenance business (garage or workshop) must usually be approved or registered. It needs a safe building, a lift or pit, correct tools and test equipment, waste storage, and qualified staff. Types: a main dealer, an independent garage, a fast-fit centre (tyres, oil) and an inspection centre.
A mechanic learns by training and practice and often takes an exam to get a grade or licence. Higher grades may sign inspection results. Good mechanics also follow safety rules: wheel chocks, jack stands, eye protection and no smoking near fuel. They give the customer a job card and bill that list the parts and work done.
Try it: make a check list
Use the 3D to find at what distance the first bar turns red. Then write a 6-line daily check list for a family car. Ask an adult where the registration, insurance and inspection dates are written, and note the next due date.
Key formulas and definitions
- Services due = distance driven ÷ service interval (round down)
- Next service at = last service km + interval
- Three kinds: daily check, periodic service, repair
- Key terms: roadworthy, inspection, preventive, corrective, licence
Worked examples
1. A car is serviced every 10,000 km. It has done 35,000 km. How many services are due so far?
35,000 ÷ 10,000 = 3.5, so 3 full services have come due. The 4th is due at 40,000 km.
2. Last service was at 24,500 km and the interval is 5,000 km. When is the next one?
24,500 + 5,000 = 29,500 km.
3. A car has 1.2 mm of brake pad left. The minimum is 3 mm. Is it safe?
No. 1.2 mm is below 3 mm, so the pads must be changed now.
4. Sort these: puncture mend, oil change, checking tyre pressure.
Puncture mend = repair. Oil change = periodic service. Checking tyre pressure = daily check.
5. A garage has a lift, tools and a licensed mechanic but stores used oil in an open drain. Is it following the law?
No. Used oil is waste and must go to an approved recycler, so the garage breaks the waste rule.
Common mistakes
- Waiting for a part to fail. Preventive service is cheaper and safer.
- Thinking only the mechanic is responsible. The owner must keep the car roadworthy by law.
- Pouring used oil down a drain. It poisons water and breaks waste laws.
- Skipping the service book. Without records, it is hard to prove care or sell the car well.