The Pitfalls of Leaving Cars Unattended for Months


In our fast-paced world, it’s not uncommon for individuals to leave their cars unattended for extended periods, such as during vacations or long-term travel. While it may seem convenient at first glance, this practice can lead to a myriad of problems. In this blog post, we will delve into the various issues associated with leaving cars unattended for months at a time. The “Quick Fixes” mentioned below are examples of how a home watch service can help protect your property.

Battery Drainage

One of the most prevalent problems with leaving a car unattended is battery drainage. Modern vehicles rely heavily on their batteries to power not only the engine but also various electronic components. When a car is left idle for an extended period, the battery slowly discharges due to natural self-discharge and the continuous power consumption of security systems and electronic modules. In some cases, the battery may even become completely depleted, rendering the vehicle inoperable and requiring a jump-start or replacement. Quick Fix: Use a battery maintainer or run the vehicle for 15 – 20 minutes once a month.

Tire Damage

Cars that remain stationary for months can experience significant tire damage. When a vehicle sits in one place for an extended period, the weight distribution on the tires can cause flat spots to develop. These flat spots can result in uneven wear and compromised tire integrity. In severe cases, the damage may be irreparable, necessitating the purchase of new tires. Quick Fix: Move/drive vehicle occasionally. Jack the vehicle up and rotate tyres.

Fluid Deterioration

Fluids play a crucial role in maintaining a car’s performance and longevity. However, when a vehicle sits idle for months, its fluids can deteriorate, posing potential risks. Engine oil, for example, can become contaminated with moisture, acids, and other impurities, leading to reduced lubrication effectiveness and potential engine damage. Brake fluid may absorb moisture from the air, resulting in decreased braking performance. To avoid such issues, it is recommended to change the oil and other vital fluids before leaving the car unattended for an extended period. Quick Fix: Use a fuel stabiliser.

Corrosion and Rust

Leaving a car exposed to the elements for months without protection increases the likelihood of corrosion and rust formation. Moisture, humidity, and temperature fluctuations can contribute to the oxidation of metal components, leading to structural weakness and aesthetic deterioration. Rust can affect various parts of the vehicle, including the body, undercarriage, and brake lines, compromising safety and overall functionality. Quick Fix: Use a car cover if the vehicle is in the open air. Have the car washed periodically.

Pest Infestation: An unattended car can become an inviting haven for pests such as rats, mice, and insects (particularly ants and cockroaches). These creatures can cause extensive damage to the car’s interior, wiring, and insulation. Moreover, they may build nests or leave behind debris that can be challenging to remove. Preventive measures such as sealing openings, placing traps, and regularly cleaning the vehicle can help mitigate the risk of infestation. Quick Fix: Make sure there is no food left in the car. Under or between the seats or in any of the compartments.

Security Concerns: Leaving a car unattended for months increases the chances of theft or vandalism. Unsecured vehicles are easy targets for thieves, and even if the car remains untouched, the absence of regular maintenance and oversight can make it more vulnerable to mechanical failures or issues that go unnoticed until it’s too late. Quick Fix: Have someone check the vehicle occasionally.


While it may seem convenient to leave a car unattended for months at a time, the potential problems that can arise outweigh any perceived benefits. From battery drainage and tire damage to fluid deterioration, corrosion, pest infestation, and security concerns, the risks associated with neglecting a vehicle are numerous. To ensure the longevity and reliability of your car, it is crucial to take preventative measures such as regular maintenance, storing the vehicle in a secure and controlled environment, and seeking assistance from trusted individuals if you must leave it unattended for an extended period. By addressing these concerns proactively, you can avoid unnecessary headaches and expenses down the road. Remember, a little care today can go a long way in preserving the condition and value of your car for years to come.