There are several things that you may think you can do to upgrade your vehicle or fix it in case of a broken part… but that you probably should not do at all. So, instead of telling you what DIY projects you can do at home, we want to make sure you’re being safe and responsible – and so here are the DIY projects you should NOT do and instead leave them up to the pros. Reasons? Because you can end up costing yourself a lot more money if a tiny thing goes wrong. Check out our list.

1. Upgraded sound system. You might think you can do this, but it involves delicate wiring that could start a fire, fry your system, or just not end up working. Take your vehicle to a pro and let them do the work for you!

2. Windshield repairs. Sure, you can find kits that will “fix” your windshield, but if a crack or chip is big enough (or is there at all) it can lead to more serious issues. Think about how much force is going against your windshield as you drive, and then think about that force spreading cracks that you might not even see. Take this one to the pros!

3. Engine diagnostics. You can buy a device that’ll turn off any lights or tell you what the problem is, sure, but turning off the light won’t fix the problem. The cost of taking this issue to your shop or dealer is about the same as the device, and will actually get the problem fixed without the risk of serious issues with your vehicle.

4. Fuel pumps. This is an expensive part, so you might think you can cut costs by installing it yourself. False! This is a super precise piece of equipment that needs to be installed just right, and if you mess it up you can literally total your car from the inside out. Leave this one to the professionals, friend.

5. Anything to do with the transmission. Even replacing the fluid in your transmission is something that should be done by a pro. If you think you can replace the entire thing yourself, you’re mistaken! Let a professional handle it. You’ll spend money either way since it’s not a cheap fix or replacement. But when you trust a professional, you’ll get what you pay for when it comes to the fix actually working.

These are just some of the things you shouldn’t do yourself – but remember, there are things you can do at home! Keep your car clean, check the oil, and make sure nothing’s wrong.