Yesterday, I saw my neighbor's husband trying to change his brake pads after watching just one YouTube video. The outcome is something everyone can probably guess.

These days, there are countless maintenance videos available. From oil changes to air conditioning refrigerant charging, there's nothing you can't find by searching online. The problem is that there is a surprisingly large gap between what seems doable and what is actually safe to do.

First, let's look at the things that are generally safe to do yourself. Changing engine oil can cost between $35 and $60 for materials, while a shop will charge between $35 and $75 for regular oil and over $100 for synthetic oil. Doing it yourself can save you about $25 to $70 each time. Replacing air filters, wiper blades, and batteries can also be done by most people with just a few tools and a video.

Brake pad replacement is technically in the DIY category as well. However, this is where you need to be a bit more cautious. It's absolutely essential not to work under a car that is only supported by a jack; you must use jack stands to secure it first. This cannot be emphasized enough.

The trouble starts after that. While there are plenty of videos on air conditioning refrigerant charging, this is not something individuals should attempt carelessly. You need an EPA Section 609 certification to buy or handle refrigerants, and charging refrigerant without a certification is technically illegal. The only exception might be small cans under two pounds with self-sealing valves, but even then, mishandling can easily damage the entire system.

Brake lines, airbags, and electronic control unit wiring are similar. There are always people in the comments claiming they did it without any issues, but their luck does not mean the task is safe. Mishandling an airbag can lead to accidents, and brake lines are critical components that should not be touched without a shop lift and specialized equipment.

Modern automatic transmissions have similar pitfalls. Older cars could have their transmission fluid changed at home, but many new cars come with sealed systems that require special scanners to check pressure and levels. It may seem like a simple task of removing a few bolts, but without diagnostic equipment, you could end up needing a complete transmission replacement, so it's better to leave this to a professional.

Changing a timing belt falls into the same category. While it may seem straightforward, if the valve timing is even slightly off, it can lead to a catastrophic collision between the engine's valves and pistons. Many YouTube videos only show successful cases, so the potential repair costs for failures are often not highlighted.

While regulations can be frustrating, I can understand the reasoning behind the refrigerant certification requirement. Allowing anyone to release refrigerants into the atmosphere is harmful to the environment, and many people have ruined their car's air conditioning systems due to improper handling.

According to AAA, the annual cost of owning a new car is $11,577, with maintenance, repairs, and tires costing about 10.13 cents per mile. If you drive 15,000 miles a year, that's not a small amount, so it's beneficial to handle tasks like oil changes and filters yourself while leaving safety-critical tasks to professionals.

I've seen many cases where someone tried to save money by trusting a single video and ended up needing a tow truck. Remember, YouTube is just a reference, not a substitute for a license; keeping this in mind is half the battle.