What size Allen key do you need to remove a caliper bolt on a 2003 Mazda Protege 5?

To remove a caliper bolt on a 2003 Mazda Protege 5, you typically need a 7mm Allen key (also known as a hex wrench). It's important to ensure you have the correct size to avoid stripping the bolt. Always double-check the specifications in your vehicle's service manual, as variations may exist based on the specific model or brake system.