Most teenagers' dream of a used car that's not too pricey, runs well and looks sharp, with an emphasis on "sharp". Unfortunately, these three characteristics are not always found in the same vehicle. That means it's your job to research the vehicle and find out what's inside.

If your car knowledge is limited, find a mechanic or friend who is wise in the ways of vehicles. Ask or pay him/her to accompany you to the car lot. Have these key items checked before you plunk down your life savings.

Fluids: Most cars have over ten fluids. The important ones to check are the engine coolant, oil, transmission, power-steering, and brake fluids. Contaminants or low fluids can be your clue that the car has been poorly maintained.

Accident Alert: Problems in the following areas may indicate a previous accident: bent or welded frame; doors, hood and trunk that have gaps or do not close properly; paint color is not uniform; ripples in the metal. You'll have to get it on a lift for a full inspection, but it's worth the trouble.

Steering and Suspension: Too much play in the steering may mean worn parts; that's bad and usually expensive news. A car's suspension system refers to its shocks and/or struts. If this system (aptly named because it literally "suspends" your car over its four tires) is in bad shape, you could lose the ability to steer over rough terrain, making your ride dangerous and bumpy. Your car expert friend will use the "bounce test" to check it out.

Exhaust: That hot-rod noise may sound cool, but it could mean a leak in one of several places. If this leak is in the catalytic converter, you could possibly fail a motor-vehicle inspection.

Belts and Hoses: Worn belts and hoses can be good indicators of how the previous owner(s) maintained the car. If these items are in bad shape, beware.

Engine and Transmission: Because the engine powers the car and the transmission "transmits" this power to the wheels, these two systems are important players. Check them both visually and with a test drive. The car should run quietly and smoothly. If it is a manual, the gears should shift easily.

Brakes: While your dream car is up on the lift, make sure the brake system is examined. This involves removing a couple of wheels. Look at the pads, shoes, rotors, drums and hydraulic parts.

Tires: Check the tread on all five (the spare makes five) tires. Worn treads mean you'll soon be investing in new tires. Treads that have worn unevenly indicate poor alignment.

Resist the urge to follow your heart with your wallet until you know the car inside and out. As time goes by you'll be glad you did your homework.