Car Maintenance Checklist with Photos

The oil dipstick in this Toyota has a bright yellow handle

Warm up the engine. Park your vehicle on a level spot. Set the parking brake. Make sure the transmission is in "Park." Stop the engine. Wait for a minute or two to let engine oil drain into the oil pan. Find the engine oil dipstick, usually it has a bright handle saying "Engine Oil". Careful, it's probably hot. You can find the instructions and location of the oil dipstick in the Maintenance section in your owner's manual.

Careful, the dipstick might be hot

Pull the dipstick out and wipe it off with a clean towel. Insert it back fully. Pull it out again and check the oil level.

Your engine depends on the proper level of clean oil to last

The oil level should be between the "Low" and "Full" marks. We recommend keeping it closer to the "Full" mark. If the level is low, top it up. Some cars and trucks have a crossed section on the dipstick instead of the marks. It works the same way, see how to read it in your owners manual.

Check the oil condition: If it's way too black, it's time for an oil change. If it's like in the top image, have the oil change done or at least top the level up. If it's a little dark, but still clean and transparent, as in the lower photo, good job! Keep following the maintenance schedule.

Check the oil grade on the oil filler cap

To top up engine oil, use the recommended oil grade. The most common oil grades are 0W-20, 5W-20 and 5W-30. You can find it in your owner's manual, or on the oil filler cap. See the photo. If your engine needs synthetic oil, use only synthetic oil.

To top up, open the oil filler cap and add a small amount of oil. Use a funnel if needed. Wipe the spill with a towel.

How to top up:
Open the oil filler cap and add a small amount of oil. Wait for a couple of minutes to let oil to flow into the oil pan. Check the oil level again with the dipstick. If it's still low, add some more, but don't overfill it. Don't forget to install the dipstick back and close the oil filler cap when you are done.

Check the battery condition visually.

Corroded battery terminals will cause many problems. Click for the larger image.

Check the battery condition visually. Look at the battery terminals; they should not be loose or corroded. See the photos. Corrosion or loose connection at the battery terminals can result in a no-start, Check Engine light, lack of electric power steering assist and many other problems.

You may find tips on how to clean the battery terminals in your vehicle's owner's manual. Here are some Youtube videos on the subject. Be careful, that white flaky corrosion stuff is very acidic. Servicing battery terminals in a repair shop costs from $30 to $55.
If your engine turns over slower than before and dash light dim when you are starting your car, it's an early sign that your battery is getting weak. It might just need to be charged or it has permanently lost some of its capacity. Your mechanic can do a battery test to check the capacity. If you battery is more than 5 years old, and you feel that it's getting weaker, it might be a good idea to replace it instead of servicing or testing.

Low coolant level may cause overheating of the engine. The coolant level in this car is lower than minimum, it needs to be topped up.

Visually check the engine coolant (antifreeze) level in the overflow tank. Your owner's manual has the directions. The level should be between the "Low" and "Full" marks.
Caution, don't open the radiator cap or the pressurized overflow tank cap when the engine is hot! The cooling system is under pressure when hot.
A low coolant level can cause the engine to overheat and the heater to blow cold air from the vents. If the coolant level is low as in the photo, it needs to be topped up, using the recommended type of coolant. Check your owner's manual for safety precautions and the proper way to do it. You can also request to top it up during a regular service. An oil change service usually includes topping up fluids. If the coolant level drops soon after topping up, the vehicle needs to be checked for coolant leaks.

The engine air filter can clog up and restrict the air flow.

The engine air filter keeps the air entering the engine clean, but over time the filter gets dirty and restricts the air flow. The engine air filter is recommended to be replaced every 15,000-25,000 miles or 24,000-40,000 km, depending on the roads you drive. Mechanics check your air filter when you bring your car in for an oil change.

Replacing an air filter in the repair shop costs $35-$50.

If you want to check it or replaced it yourself, on most cars and trucks it's a fairly easy task. Your owner's manual has the directions or you can find instruction on Youtube. It's best to use an original air filter that you can buy at your local dealership parts department; it costs around $20-$30. When you are installing the air filter, make sure it's installed correctly. If the filter is not installed properly, unfiltered air entering the engine could damage the airflow sensor.
Read more: how to maintain your engine.

If your engine air filter is dirty, then the cabin air filter is likely to be dirty too. Read more about a cabin filter in this article (scroll down) How to clean car interior. A clean cabin filter helps reducing odors inside the cabin.

This Toyota Corolla does have a transmission dipstick

After the vehicle was driven for at least 20-30 minutes and the transmission fluid is warmed up, park your vehicle on a level spot. Set the parking brake. Make sure the transmission is in "P" (Park) position. Leave the engine running. Pull out the automatic transmission dipstick.

Wipe it off, using a clean lint-free towel

Wipe it off with a clean lint-free towel. Insert it back fully. Pull it out again and check the fluid level.

The level and fluid condition is OK

A transmission fluid expands when warmed up, so if the car has been driven for 20-30 minutes, the transmission level should be between the "HOT" marks.

If the transmission fluid level is low, suspect a leak and have it checked out. See this example of a transmission fluid leak. Check the fluid condition: if the fluid looks very dirty or has a burnt smell, see if your mechanic recommends changing it.

Today's cars have very strict requirement to the transmission fluid. For this reason, we recommend visiting your dealer when you want to change your transmission fluid.

Replacing wiper refills could be cheaper. The refills can be purchased from your dealer.

Replace the wipers at least once a year or earlier if they don't clean properly. If you still have the original wipers installed, you can just replace the rubber refills; they cost just a few bucks and can be purchased from your local dealership's parts department. Check if the windshield washer jets are working properly.

Check your lights regularly

Your brake and other lights are important for safe driving. How do you know that all your lights are working? Once in a while, check all your lights.

Proper tire pressure is listed on the tire pressure sticker.

Check the tire pressure regularly. If you don't have the tire pressure gauge, it's worth buying a good one. Most gas stations have an air pump with a tire pressure gauge.

You can find the recommended tire pressure in the owner's manual or on the tire pressure sticker (see photo), which is in most cars located on the driver's door jamb. In other cars, it could be located inside the gas tank lid or inside the glove box.

The proper tire pressure for this car is 35 psi.

Measure tire pressure when tires are still cold. Pump or deflate to the recommended pressure. The maximum pressure listed on tires is NOT the proper pressure!

This tire is worn out below the limit of 2/32", it's unsafe to drive

There is a safe limit of the tire tread wear. If a tire is worn below this limit, it's unsafe to drive. Your owner's manual has the directions on how to measure the tire tread wear or your mechanic can check your tires for you. This tire in the photo is unsafe.

How do you know that your tires are close to the minimum limit? Tires have wear bars (indicators) molded into the tread. See this photo of a new vs. worn-out tire. You can also check the tread with a tire tread gauge. When your tire tread wears out to around 4/32-nd of an inch, it's time to start shopping for new tires. At 4/32" of the tread remaining, tires are still considered safe, but you may start noticing that your car is sliding a bit when roads are wet.

When mechanics rotate your tires, they can also catch problems with your brakes, suspension and other underneath components that can make your car unsafe.

In front-wheel drive cars and car-based SUVs, front tires wear faster. Rear tires often wear more on the inside. Regular tire rotations help equalize tire wear. Some manufacturers recommend rotating tires at every oil change, others specify different intervals.

Recommended tire rotation patterns are also different. In most cases, tires are rotated front to back on the same side (for directional tires) or front to back and side to side. Another benefit is that your mechanic can catch problems with your brakes, suspension and other components while rotating your tires.

Does your car need tire balancing or wheel alignment? Tire or wheel balancing is the process of adding little weights to the rim to equalize weight distribution around the wheel. Wheels are balanced at the factory or when new tires are installed. If you feel a vibration at higher speeds, have your tires balanced, although this will not solve a vibration caused by flat spots on a tire or a bent rim.

The wheel alignment is adjusting suspension and steering angles. Your car needs a wheel alignment if your steering wheel is off-center when driving straight or if the vehicle pulls to one side, or if tires wear unevenly.

The contamination on the electrodes of these long-lasting iridium-tipped spark plugs caused the engine to misfire.

At some point, your car will need a tune-up. Spark plugs wear out. Even long-lasting iridium- or platinum-tipped spark plugs might have to be replaced after 80,000 miles, because sometimes they get contaminated, see the photo. If your car has spark plug wires, they might be showing some cracks too.

A serpentine belt will need to be replaced, as it stretches and cracks with age. If your car has a timing belt, it will also need to be changed. Your car will break down if either of the belts fails. If a timing belt breaks while driving, it may also cause damage to the engine. Read more about a serpentine belt and timing belt.

All these services don't have to be done at once. Your mechanic can check the condition of your engine, belts and other items and advise you if anything needs to be done. Read more: how to maintain your engine.

The 4WD system needs maintenance too. This truck is getting new gear oil in the rear differential.

4WD cars and trucks have a rear differential and a transfer case or power transfer unit (PTU). These devices are filled with gear oil or special fluid. Some trucks have a separate front axle that also has gear oil in it. These components wear too, so they too will require fluid (oil) change.

Many modern SUVs require special fluid, so it's best to check with your dealer or consult the owner's manual. Many trucks also have grease points on propeller shafts, u-joints and some other chassis components that need to be greased with a grease gun.

In this car, the coolant (green) was leaking out of the radiator

Timely repairs can save a lot of money and keep your car safe. Look for any signs that may indicate a problem. Check this photo, the owner noticed something that didn't look right under the hood, so he had it checked out. Turns out, his radiator was leaking coolant. If he hadn't repaired this problem in time, the coolant would leak out and the engine would overheat. This would cost a lot more than a new radiator.

What are the other warning signs?