
For cars parked for extended periods, the , engine and transmission, braking system, electronic components, and rubber parts will experience varying degrees of aging and damage. The hazards and precautions are as follows: Hazards: When the vehicle is parked, the oil seals are subjected to uneven force distribution around their contact points. The direction experiencing greater force becomes harder to repair the longer the vehicle remains stationary. Precautions: First is the selection of parking location. A garage or underground parking lot is the preferred choice. If parking outdoors, choose a flat parking space. During hot weather like summer, avoid leaving liquids such as drinks in the car to prevent bottle explosions due to high temperatures, which could affect interior cleanliness.

This is actually a pretty common issue. I know quite a few neighbors whose cars sit idle in the garage collecting dust for long periods. Cars are like living things - if left unused for too long, they develop various problems. The most obvious is drain; leaving it unused for a week can cause significant power loss, and after a month you'll likely need jump-starting. Tires are prone to deformation too, especially the contact patch with the ground becoming flat and affecting balance. Fluids separate and settle - engine oil oxidizes and deteriorates, coolant stratifies and precipitates, making the engine prone to issues when restarted. Rubber components like wiper blades and door seals age and crack faster. Brake discs tend to rust and seize up. A friend left his car parked for six months, only to have it break down halfway through his first drive, costing nearly two thousand in repairs. Honestly, cars aren't family heirlooms - taking them out for regular drives is what they really need.

I often help friends deal with such situations. A car left unused for long periods primarily damages the , as the onboard computer still drains power—typically leading to failure to start within two weeks. Tire deformation is also common, as prolonged pressure in one direction can cause the rubber to lose its roundness, resulting in vibrations at high speeds. If parked outdoors, bird droppings and tree sap can corrode the paint, and rainwater droplets may create swirl marks on the surface. Many owners overlook fluid issues: engine oil in the compartment can acidify, while gear oil and brake fluid absorb moisture and degrade. Additionally, gasoline in the tank tends to evaporate, forming deposits that clog fuel lines. The most troublesome issue is electronic system failures, such as moisture-induced oxidation in ABS modules or body control units, which incur high repair costs. It's advisable to start the car for at least 20 minutes monthly to recharge the battery, and ideally drive a few kilometers to circulate the fluids.

One of our two cars has been sitting idle for years, costing us quite a bit. Long-term parking is first and foremost a waste of money—tires develop flat spots in just two or three months and need replacing, and a new costs at least 600 yuan. Secondly, there are significant safety hazards: rusted brake discs increase stopping distance, and gum deposits in the fuel system can lead to fuel leaks and spontaneous combustion. Small animals also love to crawl under the chassis for warmth, often chewing on wiring. The interior environment deteriorates too—summer heat causes upholstery to release formaldehyde, and moldy AC vents blow out bacteria. Moreover, cars left unused for long periods often fail inspections; a friend’s car had to undergo emissions testing three times before passing. If you really don’t want to drive it, at least let the engine idle for 15 minutes every two weeks and use a jack to lift the car and protect the tires.

This is something we long-distance drivers feel most deeply about. A car is like a body—if it doesn't move, it deteriorates. The discharges itself daily, and after two weeks of inactivity, it may only have 50% of its charge left. The part of the tire in contact with the ground will develop oval-shaped imprints from continuous pressure, which can cause alignment issues at best or a blowout at worst. Lubricating oil will separate and settle in the oil pan, and when the engine is restarted, the oil pump may draw in impurities, potentially leading to cylinder scoring. The car's paint suffers the most when left outdoors—summer sun can bake fine cracks into it, while winter frost and snow can freeze and crack the surface. Moisture in the brake system can cause the pistons to seize; just last week, we saw a Highlander that hadn't been driven for six months needing a full set of new calipers. Electronic components are even more delicate—the infotainment screen and radar sensors can malfunction if they get damp. The solution is actually simple: ask a friend to drive it for a couple of kilometers every week. Just don't let it sit idle for too long.

In the automotive world, there's a saying that cars don't break down from use but from sitting idle, which I've personally experienced. Once, I parked my car in the company garage for three months while on a business trip, and it wouldn't start when I returned. The electrical system was the first to fail—the drained completely, locking the onboard computer and requiring a reset. The mechanical components suffered even more; the engine oil at the bearing areas had all flowed to the bottom, causing dry friction during the first few minutes of restarting. The most dangerous issue was the brake pads sticking together, making all four wheels feel glued at startup. The interior also deteriorated, with leather seats cracking like tortoise shells and the steering wheel's paint peeling and becoming sticky. A less common problem was the security system malfunctioning, causing the smart key to lose its responsiveness. Modern cars are designed for regular use; prolonged parking actually shortens their lifespan. If you're not using it, you might as well sell it to avoid wasting money on maintaining an idle vehicle.


