1. U-joints
   Axles
2. Drive shafts
   All of the above

With a drive shaft, it could possibly need to be rebalanced. If the car is shaking because of U-joints, then they may need some new grease or protective boots, or possibly be replaced altogether. If the axles are bent, they'll need to be replaced.

1. Spark plugs
   Air filter
2. Fuel filter
   Timing belt

All of the answers are possible reasons for a car shaking while idling. But if the engine light comes on, then bad spark plugs or other wiring problems are most likely to blame. These answers can also be issues if the car is accelerating, cruising or braking.

1. Extreme heat
   Strong winds
2. Ice and snow on the wheels
   Rain

Many times, if a car is cruising and shaking, the tires or wheels are to blame. But if you live in a snowy area, ice and snow can build up on tires and wheels causing it to shake. So besides parking in a garage or in a place that does not freeze, you can hose off the slush at a car wash.

1. Brake drums
   Brake rotors
2. Wheel bearings
   All of the above

The wheel bearings may be worn out, which can also affect handling. The brake rotor, which attaches to the wheel bearing hub assembly, may be worn out which may mean repair or replacement. The same goes for brake drums -– you may feel vibrations in the brake pedal when they're out of round.

1. Tires (low pressure)
   Cooling system
2. Blower fan
   Heater core

There are several reasons why the heater is blowing cold air. One of them includes a problem with your cooling system, such a low coolant level or a busted thermostat. Another place to look that isn't listed is the heater valve, which controls how much heat comes from heater core.

1. A/C compressor
   Blower motor
2. Climate control module
   A/C refrigerant

If you're not getting any air at all from the vents, that's when you would look to see if the blower motor is malfunctioning. But for when the air is blowing hot, the a/c compressor may need to be replaced, or it have other issues which may need repairing.

1. Checking your oil levels occasionally when you fill up.
   Lift the hood and look at your car's fluids.
2. The smell of burning oil
   All of these methods work.

If you have a more modern car, you may not see oil leaking, but you may smell it burning (or hear it hissing or sizzling) or see that the levels are significantly gone down in a short amount of time. Oil leaks are bad for your car and the environment!

1. Oil is leaking.
   The engine is cooling down.
2. The cooling fan is running.
   You may have low oil pressure.

The metallic clicking you hear when you turn your engine off is quite normal and alright. It's just the engine contracting and parts from the exhaust cooling down.

1. The battery
   The ignition lock
2. The key
   The engine

If the engine is off, then you don't have to look there for the problem. But the battery is a different matter because if you have a more modern or sophisticated car, then the car may need electricity flowing first before the key will turn. If the interior lights don't turn on when you open the car door, the battery is most likely dead.

1. Low tire pressure
   Heater isn't working
2. Overheating engine
   Electrical failure

An overheating engine can be a very frustrating and sometimes scary experience and there are a lot of reasons why it could be happening, such as there's a coolant leak. Other symptoms to pay attention to include the a/c stops working and your car's fuel mileage worsens.

1. The brake pads need to be replaced.
   The brake pads are gone.
2. The braking system has some misaligned or damaged parts.
   You've picked up a stone in your brakes.

Hearing scraping isn't as bad as you may think. You've probably just picked up a pebble or stone in your brakes. But if the scraping sound sticks around, then take it to your mechanic so it can be removed and prevent further damage to your brakes.

1. The engine
   The transmission
2. The brakes
   The tires

Knocking or pinging in a car typically means that something is wrong with the engine. One of the reasons could be that you need to use a fuel with a higher octane rating. Another reason could be that the engine's cylinders have carbon deposits.

1. Low on fuel
   Low tire pressure
2. Out of balance tires
   Improper wheel alignment

Most of the time, when a car is imbalanced, it has to do with the wheel alignment. An accident or collision, or even driving over a pothole or large bump, can cause your car to become misaligned.

1. Your brake pads are gone.
   You have some misaligned brake parts.
2. You just need to break in your new brakes – your brakes are just fine.
   Your tires need to be replaced.

Hearing a grinding sound as you brake? It's time to stop driving and get your brakes fixed by a mechanic. What you're hearing are the brake pads' metal backings grinding on your brake rotors.

1. Knocking
   Rattling
2. Chirping
   Squealing

If you're hearing a squealing noise from under your car's hood, then you've probably got an engine drive belt that is loose or worn. It's not the type of sound you want to ignore because once it breaks, you'll have bigger problems to deal with.

1. A problem with the exhaust system
   A worn CV joint
2. Your clutch needs adjusting or replacing.
   Any of the above

Hearing a grinding noise as you shift gears can also mean that your shift linkage needs adjusting. But let's hope it doesn't mean that your internal transmission has been damaged, which is a more expensive issue.

1. In the car's roof
   Under the hood
2. Under the car
   In the car

There are many possible sources for the rattling sound you hear in your car. It can be as innocuous as something rattling in the glove compartment or a cup holder to something more serious, like low oil pressure in your car's engine.

1. Rough idle
   Backfire
2. Low oil level
   Engine overheating

When a car has a smooth and steady idle, the RPMs should be around 1,000 RPMs on your tachometer. When the car's idle is rough, the tachometer's needle is jumping up and down, which can be due one of many issues such as a dirty fuel injector or spark plug issues.

1. Windshield washer fluid
   Brake fluid
2. Automatic transmission fluid
   Power steering fluid

There are a rainbow of colors for the fluids your car uses. Windshield washer fluid should smell like window cleaner and is watery and thin in texture. If there's a leak, you should have a mechanic look at see if the reservoir is cracked.

1. Brake fluid
   Coolant
2. Power steering fluid
   Automatic transmission fluid

Coolant can be green, pink or yellow – but if it's orange, there is rust in the cooling system. It smells sweet and is viscous to the touch. You'll want to address this leak as soon as possible to prevent overheating, which can cause damage to your car's engine.

1. Fuel issues
   TAC (Throttle actuator control) issues
2. Servo issues
   Control module issues

Cruise control failures are usually electronic in nature, with the control module being the central intelligence of a car's cruise control. Speed and clutch sensors, along with brake and control switches, can also cause cruise control to fail.

1. Gasoline
   Engine oil
2. Brake fluid
   Sugar water

Leaking water from a car is usually found when the car has been turned off and there's condensation dripping from the car's a/c – not a problem. But if you smell gasoline, it's dangerous to drive your car, so contact your mechanic and ask what to do next.

1. Engine overheating
   Coolant leaking
2. Engine oil dripping
   All of the above are valid reasons.

If the sizzling sound happens soon after you turn your car off, it's an oil drip or a coolant leak. If it's happening during while your car is idling, the engine is most likely overheating. Either way, a mechanic can help you get those issues diagnosed and fixed.

1. Worn CV joints
   Low oil level
2. Failing wheel bearing
   Fuel with low octane rating

The chirping noise may not be constant as you change speeds. Another reason the chirping noise is happening is because you have a failing axle bearing. Either of these could mean that your wheel may get locked up or get loose, so you'll want to get that taken care of.

1. Fuel
   Electronic system
2. Engine oil
   Battery

All of the other answers deal with liquids which can be affected when you're trying to start your car. For the car battery and fuel, getting your car to a warmer place helps, For engine oil, you'll need to either have your oil changed if it hasn't been changed in a long time; or you need to find an oil that's better for the wintertime.

1. Colorless
   Black
2. White
   Bluish gray or grayish white

If you see black exhaust, there's not enough air and too much fuel. White smoke is fine if you're first starting your car (that's vapor from condensation), but if you find too much white smoke, you have a coolant leak. Bluish gray or grayish white smoke indicates that your car's engine is burning oil.

1. Dried out wiper blades
   Electrical issues
2. Dirty climate or environment
   Using the wipers on a frozen windshield

Wiper blades are made of rubber and one easy way to make sure they aren't smearing your windshield is to keep them clean. But rubber can dry out or crack due to extreme temperatures and pollution. So if you're keeping the wipers clean and they're still smearing, it's time to replace them.

1. Wheels
   Engine
2. Brakes
   Power steering

Power steering has been around for over half a century, but if you don't have it, it takes a lot more muscle and effort to turn a car. Usually the issue is a broken power steering pump and that is typically not an easy fix. You'll want to take your car to a mechanic to get this fixed.

1. Open sunroof/moonroof
   Corrosion on the battery
2. Faulty brakes
   Low tire pressure

Besides that it may just be time to get another battery, there are a few reasons why a car battery can't accept a jump from another one. Corrosion on the battery will look foamy and white and can be wiped off with a rag or towel or brushed off with a brush.

1. Tire issues
   Sensor problems
2. Engine problems
   Ignition issues

Without the right mix of air, fuel, spark, exhaust and compression, you can be getting nowhere fast and lose power in your vehicle. Loss of acceleration is typically an internal issue and usually should be given to your mechanic to check out and fix.

1. Low tire pressure
   Spark plugs
2. Cold weather
   Clogged fuel injector

All of these answers can cause your fuel economy to decrease, but having older, misfiring spark plugs can make a car into a gas guzzler. Although spark plugs last up to 100,000, the last 20,00 miles can be where you start to experience the misfiring.

1. Wheel misalignment
   Faulty car stereo
2. Bad brakes
   The amount of fuel and air is off.

If you're not getting the right amount of air and fuel in your car's engine, then it can't combust and create the energy and power to make your car move. Air delivery and fuel delivery problems, along with many other issues which can cause a car to stall, should be checked out by a mechanic as soon as possible.

1. Everything is fine, keep driving.
   Engine may misfire, pull over and get a tow.
2. Serious problem with engine management and emission control
   Gas cap is loose or missing

When the engine light turns on and you're only in the lower gears, that's typically called "limp home mode", which means the car will drive more slowly. It's a safety feature meant to alert you that the car's engine needs servicing for a number of reasons including bad sensors, overheating or the car's engine misfiring.

1. Vacuum leak in the engine
   Broken windshield wipers
2. Dead battery
   Exhaust issues

Vacuum leaks in an engine can happen for several reasons, including a broken vacuum hose or tube. Usually, a car's sensors will cause the check engine light to come on as well.

1. The battery has short circuited your car.
   Your car has a bit of amnesia.
2. You have ignition issues.
   You improperly replaced the battery.

More modern cars have sophisticated computers controlling pretty much everything in a car. Removing the battery can cause it to lose its memory, such as something minor like the car clock going to 12 a.m., all the way to an engine stalling.