The battery will lose its charge. Beyond the inconvenience that your car might not start when you need it, over time lack of use can result in a dead cell. This means the battery will no longer hold a charge, leading to replacement costs. A low battery can also cause electrical faults, which can lead to various warning lights coming on while driving.

Brake rotors will begin to corrode and rust. The brake calipers can also seize up. In the best-case scenario, this can result in a pulsating sensation, or a squealing noise when braking. In the worst-case scenario, these issues can reduce the stopping power of your vehicle creating a safety risk to yourself and others on the road. 

Mice and other rodents love to build their nests inside the engine bays of vehicles. They can often gnaw away at wiring and other electronics. This can stop critical systems from functioning, such as windshield wipers or headlights.

The weight of the vehicle constantly putting pressure on the same part of the tire creates a dent, or flat spot. This can result in driveability issues including vibrations in the steering wheel. Tires can also lose pressure over time, giving you less grip on the road and prematurely wearing out the treads. 

There are many rubber seals in a vehicle. When a vehicle isn’t driven enough, these seals don’t get properly lubricated and can dry up. These issues are exacerbated by extreme temperatures (hot or cold). When you get back on the road, these seals are more prone to ripping or cracking which can result in fluid leaks and costly repairs.

Your vehicle’s suspension connects the tires to the road and acts as a shock absorber so you don’t feel every bump and pothole. When a vehicle sits for a prolonged period, the suspension components and control arms can stiffen or seize. You’ll start to hear creaks and rattles, resulting in premature wear and compromised vehicle handling.