The good news for those of us who like running down to the auto parts store for a new oil filter that we then fit onto our cars, is that by doing so we are not voiding the car's warranty. That's because in Australia the Trade Practices Act prevents the practice of exclusive dealing by attaching conditions to the sale of goods that restrict the buyer's freedom of choice to deal with whom or in what they choose. In other words, Manufacturer A can't force you to go to a Manufacturer A repair shop when your car needs a service.
Finding a motor part that is common, such as a oil filter, is easy. You simply go to your local garage and they grab a generic filter off the shelf. However, what happens if that oil filter is for a 1967 Mustang or you need a specific auto part that is only common to a particular model of car? That's when you need a specialised motor parts supplier.
There are two main ways that you can learn how to replace motor parts at home, and hopefully save a little money in the process – or perhaps even a lot of money. You might even enjoy the process and consider taking it up professionally. But first things first. The two main ways that you can learn automotive repair at home are through learning via the traditional car manual with the addition of online videos, or by taking a course at an accredited training centre.
Every car, whether it's new or has been bought second-hand must come with a warranty. The terms of the warranty are such that certain repairs will be paid for under the warranty, but only if the issuer of the warranty pre-approves them in writing and only if the replacement parts are installed, or the auto repair carried out by a mechanic approved under the warranty. There are times when doing a single repair yourself may void the warranty. Of course, the warranty isn't the only reason you should sometimes leave repairs to a qualified mechanic.