Men Standing Beside A White Car


So you’ve bought a new car, but haven’t gotten around to selling your old car, and you might not even know where to start (see our dangers of online classifieds) but procrastinating can be disastrous for your older car, and even a liability to you and your property.

You wouldn’t believe how many times a week we purchase vehicles from people whose car was in great shape physically and mechanically when, for one reason or another, they decided to let it sit for a while, as days turn into weeks and weeks turn into months they find themselves with a car that does not start, run, spews noxious smokes, and is simply not safe to drive.

Here are some problems that can and often do occur when letting your car sit for long periods of time.


There are laws and regulations in each state regarding unregistered vehicles on your property or on the street. Depending on the laws, your unregistered vehicle can spell huge headaches and even bigger fines.

We go in greater detail in our article of unregistered vehicles.


After long periods of inactivity you’ll often notice problems with the battery. A vehicle not running for just a week or two will often kill a battery. An older battery will die even faster. It’s good to disconnect the battery completely before letting a car sit or connecting it to a battery tender to charge.

Once the battery is dead the car will not start and you will have trouble even moving it from one spot to the other, which could make emergencies where you need to move a car with little notice, impossible.


If you’re going to keep your car from moving for long periods of time, you should drain fluids out of your car (antifreeze, motor oil, etc.) Always check your car’s manual to ensure that you are draining the proper fluids, and always remember to replace them before you move the car, an engine with no motor oil running for even a few seconds can seize the engine and render it into a giant paperweight.


Tires are the only part of your car that actually touches the ground all the time. Over extended periods of time, this will often lead to flat, deflated, rotten, and warped tires. While simply putting air into the tire will inflate them, it’s not always safe to drive on tires that have been sitting idle too long. A warped tire creates a bubble, often not visible by quick inspection, that is very dangerous to drive on, and can lead to unexpected tire bursts while driving. Tire rot give the tires no stability when braking and has less traction in cornering situations.

It is extremely dangerous to drive a car that has been sitting with bad tires and the problem is that there is no real way to prevent warped and rotting tires. When getting the vehicle back on the road you should always have the vehicle towed to a shop and purchase new tires.


Paint is the first thing people notice when viewing your vehicle. It is also a huge determining factor when trying to figure out the value of your car. A car sitting under a tree can spell disaster for your paint. Often clumps of sap will stick to the car and damage your clear coats. Unusual color shading can occur, and in extreme cases, excessive dullness.

Having a car sit in a spot with the sun hitting it directly will cause fading, usually in the hood and roof. It will cause your vehicle’s natural clear coat to peel.

Apart from the damages naturally caused to your car, there are other damages caused by lack of maintenance. Not washing your car once a week can result in irreversible paint defects. Paint is one of those things that make or break a car sale. Getting a simple paint job does not always help the situation, and can often make it worse.

For instance If you paint your car just because it’s been sitting a while and it now has some fading, someone who views your car can often tell if it has been painted recently, and this can raise other suspicions that might be unrelated. Even if they don’t notice it, a mechanic or friend who knows more about cars will be able to tell and almost always will be suspicious about the new paint.

Consumers don’t like a repainted car, it destroys value and leads to the question “was this car wrecked once before and is that why it’s been painted?”

I recommend a cover over your car if it’s going to be sitting for a while. You can get them at your local auto supply store, online or at your car dealership.


Fuel Pumps are another thing to quickly break down in a car that is just sitting around. Not letting certain fluids flow through components can cause them to malfunction and require replacing. A fuel pump is no exception.

A faulty fuel pump will cause a car to not start. It is very hard to determine if it is indeed a fuel pump that needs repair. Most times, a mechanic will have to actually replace it and test the car to see if it starts or not to determine if that is the problem and if it’s not, you will still have to pay for the parts and repair.


One of the most expensive things to replace on your car, apart from the engine and transmission, is your gas tank, and it’s also one of the most common things that break down in an unused car. The damage often comes from rust that develops from exposed metal.

A rusted gas tank can leak gasoline, which can lead to disaster, and if left unnoticed, the contamination on the ground can, not only bring fines from the municipality, but can also prevent you from selling your house unless the contamination is properly dealt with.

Once the tank is rusted, the entire tank will need replacing, as well as the fuel pumps and other valves and pipes surrounding the gas tank.

In order to prevent this, your gas tank should be filled up to prevent rusting in the tank.

Just remember that gas goes bad, and you should pump the tank out, properly dispose of the fuel, and then refill the tank before you start your car after a long time of just sitting around.


Any vehicle that sits around for a prolonged period of time, is certain to develop rust in most, if not all metal parts. There are countless parts and components that can rust and can lead to costly replacements and repair.

Frame rust, the most costly of all rust problems, can determine whether your car belongs on the market or a junk yard. Unless your car is a high valued classic it’s not reasonable to repair frame rust.

Rust can lead to extreme corrosion which will lead to cracking in the frame, which is essentially an invisible death trap to drivers. There are even legal guidelines to selling a vehicle with frame corrosion issues, so make sure that you know the local laws (check your states guidelines).

If you sell a car in NJ with known frame corrosion, you can be held liable for an accident caused by that car, even if it happens months after the car was sold. This is a very serious issue and you should always have the car you’re selling, fully inspected by a mechanic and have the inspection recorded in writing, just in case you need it for future reference.


Oil is vital in the proper operation of your motor vehicle. Oil sitting too long in one spot is not good for the mechanical aspects of your automobile. Certain mechanisms must be lubricated and this only can take place when the car is running and operating at least twice a week.

Oil turns black when it sits too long, and this is indicator that the oil needs to be flushed and replaced before operating.


Brakes and rotors will rust and go bad after a certain amount of time of inactivity. It is very dangerous to jump start the battery on a car that has been sitting and take it for a test drive.

You can tell the brakes have gone bad if you feel grinding when applying the brakes, and hear a high pitched squeaking noise.

A car that has been sitting idle for prolonged periods of time should be towed to a mechanic and the brakes and rotors should be replaced before attempting to place the car back on the road.


Plugs can go bad from sitting. You can usually tell, because the fuel mileage and engine performance will drop. The car may “stutter” and will not idle or run smoothly. If the plugs get bad enough, the car won’t be drivable at all.


Insects and other pests (spiders, snakes, etc) can invade and reside in a sitting car. When outdoor conditions are not to their liking pests and insects will seek the comfort of shade or some other enclosed space, often in urban areas, a car becomes the de facto solution.

I once purchased a vehicle that had been sitting under a tree for a long time and I did not look closely enough to realize the nest of spiders in the car. One day I sat down in the car, and realized that there were hundreds of little spiders in the dashboard. Getting rid of certain pests from your vehicles (spiders being one of them), is not as simple a task as it might sound.

I have heard stories of people in the industry buying cars infested with possums, rats, mice, roaches, and everything else you could possibly imagine. I know, it sounds funny, but try getting rid of something you normally want nothing to do with.

Aside from the fact that it is difficult to rid your vehicle of this problem, imagine driving on a highway and a possum crawls out from under the seat. This can startle you and cause a major accident and much worse.

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