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What Size is the Brake Caliper Bolt? A Guide for DIY Enthusiasts

Published by Dustin Babich on

The size of the brake caliper bolt varies depending on the make and model of the vehicle. Typically, the size ranges from 8mm to 14mm in diameter.

The best way to determine the exact size is to consult the vehicle’s owner manual or a professional mechanic. Brake calipers play an essential role in a vehicle’s braking system, as they hold the brake pads and facilitate the stopping of the wheels.

Brake Caliper Bolt
Check Brake Caliper Bolt Size With Price.

The calipers use special bolts to secure them onto the rotor or spindle, which can vary in size depending on the make and model of the vehicle. It is crucial to use the correct size of brake caliper bolt during replacement or repair to maintain the braking system’s integrity and safety standards. In this article, we’ll discuss more about the brake caliper bolt size and its importance in ensuring road safety.

Different Types Of Brake Caliper Bolts

Brake caliper bolts are an integral component of a vehicle’s braking system. There are two common types of brake caliper bolts: sliding and fixed. Sliding bolts feature threads that require thread locker to ensure a secure installation. By contrast, fixed bolts use a mounting bracket that holds the caliper firmly in place.

When replacing brake caliper bolts, it is important to choose the correct size to ensure the brakes function properly. Using a torque wrench to tighten caliper bolts is also essential to avoid over-tightening or under-tightening, both of which can lead to brake failure.

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So, whether you’re a professional mechanic or a diy car enthusiast, understanding the difference between sliding and fixed brake caliper bolts is essential to ensure optimal brake performance.

Measuring For Brake Caliper Bolt Size

Before purchasing a new brake caliper bolt, it’s crucial to determine the correct size. Use a caliper micrometer or measuring tape to measure the bolt’s diameter and length. Getting an accurate measurement is essential to ensure a safe and secure installation.

It’s a straightforward process that requires attention to detail. Take care not to rush or make assumptions about the bolt’s size. Incorrect measurements can lead to brake failure and accidents on the road. Once you have the correct measurements, finding a suitable replacement bolt is easy.

A correctly sized bolt guarantees efficient braking and peace of mind on your next road trip.

Standard Sizes Of Brake Caliper Bolts

Brake caliper bolts are a crucial component of the braking system and come in various sizes. Commonly used bolt sizes for most cars are m10 x 1. 25, m12 x 1. 25, and m14 x 1. 5. However, some cars may require non-standard sizes, so it’s important to consult the manufacturer’s guidelines before replacing them.

Choosing the wrong bolt size can lead to brake failure and endanger the driver’s life. Therefore, it’s imperative to use the correct size recommended by the manufacturer. Keep in mind that brake caliper bolts have unique engineering specifications and tolerances that must be met to ensure safe operation and optimal braking performance.

Troubleshooting Brake Caliper Bolt Issues

Issues with vibration or rattling noises from brake caliper area could indicate loose or mismatched brake caliper bolts. As such, it is important to resolve such problems immediately. This helps to prevent brake failure or damage which could be catastrophic if not dealt with urgently.

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Performing regular checks on brake caliper bolts helps to ensure they are well-fitted and of the correct size. It is advisable to seek the services of a professional mechanic to get the job done right. Proper installation and maintenance of brake calipers and their bolts help to guarantee the safety of your vehicle, and in turn, your life.

Frequently Asked Questions For What Size Is The Brake Caliper Bolt


If the brake caliper bolt is loose, it can cause the brakes to malfunction, make noises or vibrate. It is important to have the issue fixed immediately by a qualified mechanic.


Strong brakes are essential to prevent accidents while driving. Therefore, knowing the brake caliper bolt size is important for anyone who intends to replace the bolts and maintain adequate brake performance. By checking your owner’s manual, contacting your dealer, or researching online, you can find out the correct size of brake caliper bolt to use.

Whether you are a professional mechanic or a diyer, replacing worn or broken caliper bolts is a simple fix that can keep you safe on the road. Don’t forget that maintaining your car’s components is critical, and brake bolts should never be overlooked.

Dustin Babich
Categories: Knowledgebase

Dustin Babich

Dustin Babich

As the passionate author behind, Dustin Babich is a knowledgeable expert in all things automotive. With a deep understanding of car tools, equipment, engines, and troubleshooting techniques, Dustin Babich shares invaluable insights, practical tips, and effective solutions to empower readers in overcoming car-related challenges.

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