DesiCarGuide

Coolant Flush is the Process of taking out the old coolant and replacing it with new one.

Brake Pads - With regular usage , the brake pads get worn out and need a replacement. Most car manufacturers suggest 30 to 35K miles but actual can be less or more , depending on the terrain and your driving habits.

Fill AC Refrigrant (FREON) - AC System malfunctions and even completely shuts down if the Refrigerant pressure is low or if it is high. If the pressure is high ,the ac may shut down usually in the summer days, when the outside temperature is quite high. So when the AC starts blowing warm air, you know that it is time to check the freon pressure . Ofcourse the assumption here is that the all else is fine :- AC Belt , The AC compressor itself , and the hoses and pipes have now leak and sensors are ok.

Spark Plug replacemnt and adjustment is infact a maintanence event and not a repair item. Although the maufacturers sometimes recommned a replacement interval as high as 90K miles , it is a good idea to open these and check them at a 3rd of the interal- example every 30K miles.

Most batteries have a life span of 3 to 7 years depending on the quality and ambient weather. After 3 to 4 year you should be on the look out for the set of symptoms that result from a weak battery. Symptoms included car unable to start or the starter doing weak cranks.

It is important to maintain your antifreeze/coolant at the proper concentration to provide good corrosion protection as well as prevent freeze-ups and boil overs. That is when the car is parked out in the cold , the coolant can freeze up and expand and crack the engine block causing permanent damage.

Engine Air Filter is usually at the input of the air-intake system.  Air intake system in turn provides the necessary air (some times below atmospheric pressure) to the Fuel System's intake manifold. To put it simply , the engine needs air for burning and this is the filter it uses to make sure the air is free from dry leaves , dead insects and other debris. A good vs bad filter is shown below :

AC or Cabin Filter is the filter for your AC system.  The air outside the car enters the AC system through this filter.  So obviously from a health point of view , it makes sense to make sure it is replaced periodically.  For normal usage i would recommend changing it  once every 6 months.  See examples of Cabin filters below :

You will know when it is time to replace the wiper  blades when you see, smudge lines and dirt still left in your wind shield , even after running the wiper a few times.  Bad wipers are not something you want to run into with during a storm. Also the dirt and smudge might create a glare for night time driving. So it is better to change the wiper every year per season, like spring time.

Light Bulbs are one of those things if they are out ,  will get you pulled over ..'Sir your Tail light is OUT'