Founded in 1960, Haynes has been providing auto advice and guidance for nearly 60 years. All their guides and tips are written by people who have done the job themselves, making them easy to follow and understand. Haynes is the ultimate DIY guide to auto repair for new, used,and collector vehicles. Whether you’re trying to do something routine like change a spark plug or you’re embarking on a larger project, Haynes has the manuals and step-by-step guide to get the job done.

Their website features how-to videos of common and smaller projects, like thermostat replacements and coolant system drainings. For more complicated jobs, you can search their site by the make, model, and year of your car and find a detailed manual of everything you could need. And, when you use a Haynes promo code, you’ll get huge savings on all their products, making your next auto project a breeze.