You might think that there are some repairs and upgrades that you can take care of yourself in a nice DIY-type thing, and there are! But these are some of them that you should NOT be doing yourself, under any circumstances, because it will mess up your car and you will regret it. Take a look – if you had plans to do any of these things, reschedule! And by that I mean have your dealer do the job for you!

1. Anything to do with the transmission. Even replacing the fluid in your transmission is something that should be done by a pro. 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.

2. Windshield repairs. Sure, you can find kits that will “fix” your windshield, but if a crack or chip is big enough it can lead to much more serious issues. Think about how much force is against your windshield as you drive, and then think about that force spreading cracks that you might not even see with the naked eye.

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

4. Fuel pumps. This is an expensive auto part, so you might think you can cut your costs by installing it on your own… but you’d be wrong. This is a very precise piece of equipment that needs to be installed just right, and if you mess it up you can total your car from the inside out.

5. Engine diagnostics. You can buy devices 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.