Can I install a spare part myself? Everything you need to know before doing so.
- expartmalaga
- Jul 30, 2025
- 4 min read
When you receive a replacement part you've been wanting for a while, it's normal to wonder if you could install it yourself. The idea of saving on labor, spending some time with your car, and solving the problem yourself is very appealing. However, it's not always as simple as it seems.
At Expart, we've seen for years how many people attempt to install parts requiring advanced technical knowledge on their own, and how others are perfectly comfortable with basic assembly. That's why we want to offer you a professional, clear, and honest guide to help you decide when you can install a part yourself and when it's best to go to a specialized workshop.
Not all pieces are the same
The first thing to consider is what type of part you want to install. Some replacement parts are relatively easy to install and don't directly affect the safety systems or critical vehicle operation. Components such as a rearview mirror, a battery, or a taillight can usually be installed without much difficulty if you have a minimum of tools and a certain amount of manual dexterity.
On the other hand, there are parts that are part of vital vehicle systems, such as braking, steering, clutch, and electronic management. In these cases, incorrect installation can not only cause a breakdown but also jeopardize your safety on the road. And this isn't an exaggeration: improper tightening, a loose connection, or a poorly performed reprogramming can have serious consequences.
Experience counts (and a lot)
If you've never disassembled anything in your car before, it's not a good idea to start with a complex part. Assembling a spare part isn't simply a matter of swapping one part for another. It requires understanding the system it's part of, knowing how to disassemble everything without damaging anything, properly positioning each element, securing it properly, and, sometimes, reconfiguring the vehicle's ECU.
Many modern cars have sensitive electronics, interconnected sensor systems, and specific procedures that require professional software or tools. Therefore, although tutorials abound on the internet, following a video doesn't always guarantee that you're doing it right. The key is to honestly assess your experience.
What happens if something doesn't fit or doesn't work?
A very common situation occurs when, after assembly, the part doesn't work as it should. Sometimes the problem isn't with the replacement, but with the installation: a poorly made connection, a sensor damaged during the process, or simply an incompatible part. The first thing to do in these cases is to stop, review each step, and seek technical assistance before continuing to manipulate the part.
At Expart, although we don't perform assembly work, we are available to advise you if you have questions about part compatibility or the proper installation process. Our priority is ensuring the part you received performs as expected, and if something doesn't go as expected, you can write to us so we can review the matter together.
Is it legal to do it yourself?
Yes, you can install a replacement yourself, as long as you don't modify approved components or compromise the vehicle's safety. However, keep in mind that certain improperly installed parts can cause problems at the vehicle inspection (MOT) or even invalidate insurance coverage in the event of an accident if improper tampering is proven. Therefore, if you have any doubts, the most responsible thing to do is consult a professional.
Installing a rearview mirror yourself isn't usually a problem. But changing the brake system, suspension, or electronics without technical knowledge can have bigger consequences than you imagine. Sometimes, what seemed like a savings ends up being a double repair.
Tips before assembling a piece on your own
If you ultimately decide to install a replacement yourself, keep the following in mind:
Make sure the part is fully compatible with your car (model, version, engine, year).
Consult specific tutorials for the same vehicle and follow the steps carefully.
Always work with the car stopped, the battery disconnected (if applicable), and in a stable area, without rushing.
Please keep the original packaging and order information in case you need to make any returns or inquire later.
Don't force any part: If something doesn't fit, stop and check. It could be an incomplete fit, or a missing part.
If you have the slightest doubt about safety or operation, go to a workshop. Your peace of mind deserves it.
What if I prefer to have it assembled by a professional?
If you're inexperienced or don't feel comfortable doing it yourself, finding a trusted repair shop is the best option. Many shops will accept parts you've purchased yourself, and their work ensures proper installation with the right tools and specialized knowledge.
At Expart, we don't offer assembly, but if you need it, we can help you locate a recommended workshop in your area. We want the part we've found for you to work perfectly and fulfill its purpose.
Do you have questions or want to tell us about your experience?
Has this ever happened to you? Have you installed a piece yourself and want to share how it went? Or do you have questions about a specific piece you're thinking about installing? We'd love to hear from you.
We invite you to leave your comment at the end of this post. Our team will be happy to answer or guide you if you're considering options.
Contact us:
Web: www.expart.es
Email: info@expart.es
Wallapop: Expart Profile
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