Use Your Senses
Using your senses can be one of the best tools to let you know something is wrong with your car. Keeping an eye out, listening and smelling can help you locate problems early on and help to avoid repairs later on.
Sights
Doing a visual check in, around and under your car can give you a lot of insight. It’s a good idea to check that all lights are in working order, outside and inside. Look at the top and sides of the battery as well as the engine to make sure there isn’t a build-up of dirt or grime. Check belts on the inside for cracks. Putting some newspaper underneath the engine can alert you to possible fluid leaks.
Sounds
Your car may be trying to tell you something. The shift from gear to gear in the transmission should be nearly silent without any grinding or rubbing noises. A humming sound from below, possibly a change in pitch based on acceleration, can mean the differential or wheel bearings are low on lubricant or a more serious problem. A groaning sound when turning is a strong indication that you’re low or out of power steering fluid. A high-pitched, rhythmic squeal most likely indicates you have loose fan belts. Using a belt lubricant may take care of the problem.
Smells
Smelling
something unusual can alert you to danger signs. If you smell “burning
rubber,” it may mean you are riding the brakes, which can
damage the brakes and wear out your tires. A “rotten egg” smell
often means there is unburned gas in the catalytic converter. A
sweet, steamy odor may indicate a leak in the coolant system.
Keeping your eyes, ears and nose open could save you money. They
are your best warning signs and could help you avoid costly repairs.