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What size brake line fitting for Toyota Tacoma?

The standard brake line fitting size for a Toyota Tacoma is 3/16 inch. This size is commonly used for the front and rear brake lines on this popular mid-size pickup truck.


Brake Line Fitting Sizes Explained


Brake line fittings are measured in fractions of an inch, with the most common sizes being 1/4 inch, 3/16 inch, and 5/16 inch. The size refers to the outer diameter of the brake line tubing that the fitting connects to.



  • 1/4 inch: A common size used on many passenger vehicles and light trucks.

  • 3/16 inch: The standard size for the Toyota Tacoma and other mid-size trucks.

  • 5/16 inch: Typically found on larger trucks and SUVs with more heavy-duty braking systems.


It's important to use the correct fitting size to ensure a proper, leak-free connection between the brake line and the vehicle's components. Using the wrong size can lead to leaks, brake system issues, and even safety concerns.


Identifying Brake Line Fittings on a Toyota Tacoma


To confirm the brake line fitting size on a Toyota Tacoma, you can:



  • Visually inspect the existing brake line fittings. They should be clearly marked with the size, such as "3/16".

  • Measure the outer diameter of the brake line tubing with a caliper or micrometer. This will give you the exact fitting size needed.

  • Consult your Tacoma's owner's manual or service documentation, which should specify the correct brake line fitting size.


Using the proper 3/16 inch brake line fittings when servicing or replacing components on your Toyota Tacoma is crucial for maintaining a safe and reliable braking system.

Should I use 3/16 or 1/4 in brake line?


When a replacement line is needed, the obvious question is what size brake line to get. The answer is really pretty easy. Almost every car or truck worldwide utilizes a 3/16-inch brake line, also referred to as a CNF-3.



What size brake line fitting do I need?


3/16" (4.75mm): This is the most common size used in most passenger vehicles. It is often referred to as the "universal size" for brake lines. 1/4" (6mm): Typically found in trucks and larger vehicles, this size can handle higher pressure and is used in applications where the braking system requires more robust lines.



What is bigger, 3 16 or 1/4?


But now with the same denominator. We're just going to compare the numerators. And 4 is larger than 3 so 4 16 that's larger than 3 16. And therefore one-fourth that is larger than 3 16..



Should I use copper or steel brake lines?


Studies included brake fluid viscosity, operating temperatures, tube length, and fluid flow rate. All tests prove copper-nickel brake lines provide superior reliability to steel.



What size are Toyota brake line fittings?


The standard Toyota brake line fitting is 10mmx1.
Where the lines enter tees, calipers, or drum brake assemblies, you'll need a 10mm wrench. It's best to use a flare nut wrench to keep from stripping the non-hardened brake line fittings.



What are the two types of brake line fittings?


The main types include double flare, bubble flare, and AN fittings. Each type is designed for different applications and connections within the brake system.



What is the inside diameter of a 3 16 brake line?


Wall thickness 0.028 inch (0.7mm) Inside Diameter 3/16 inch (3.3mm) Outside diameter 4.8mm.



What thread size is 5 16 brake line?


1/2-20 thread
1/2-20 thread. To be used with 5/16" brake line tubing.



What type of brake line flare does Toyota use?


double flare
Toyota Brake Flare Type
Toyota brake tube ends need a double flare, also known as an inverted flare. You should not confuse this with a bubble flare or a single flare. If you try to use bubble/single flares on your brake components they will leak.



What are the most common brake line fittings?


Here are the most common types:

  • Double Flare Fittings: These are widely used in automotive brake systems.
  • Bubble Flare Fittings: Bubble flare fittings, also known as single flare fittings, are commonly found in European vehicles.
  • AN (Army-Navy) Fittings: AN fittings are used in racing and high-performance applications.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.