When you brake your Mazda, the brake pads clamp down on the brake disc rotors connected to the wheels. This action allows you to stop your Mazda as and when needed, so it's essential to ensure yours are in good working condition to avoid any issues braking while driving.

The Function of Mazda Brake Disc Rotors

Role in the Braking System

Your Mazda will have four brake disc rotors, one of which is connected to each wheel. Stepping on the brake pedal activates the brakes, causing the brake pads to press against the brake disc rotors and convert the wheels' kinetic energy (movement) into thermal energy. This slows down the wheels through friction.

Mazda Brake Disc Rotor Design Types

There are different types of brake disc rotors used by Mazda in their vehicles, and the kind of brake disc rotors found in Mazdas can even differ in the same year. The brake disc rotors can be solid or vented for their general construction. Furthermore, the surface of the discs can also be either smooth, drilled, or slotted, or even be a mix of drilled and slotted.

Smooth (Solid or Vented)

Solid disc brakes are just as their name describes. These basic types of disc brakes have a smooth surface around the rotor and are relatively inexpensive to manufacture. Because they are not as efficient at dissipating heat, they are commonly only found in light passenger vehicles whose brakes are not subject to high levels of heat stress.

Vented brake disc rotors have a hollow vent between the front and rear surfaces for heat dissipation capability. Although they are slightly heavier than the smooth kind, they can better keep within optimum temperatures and are thus usually the standard for performance models.

Slotted or Drilled

Slotted brake disc rotors come with long slits or vents on the surface around the rotor. The slots have a higher friction coefficient than standard discs and can disperse water and gas to deliver better braking performance.

Instead of slots, drilled brake disc rotors have drilled holes in the surface. The drilled holes offer similar benefits as vents over the standard smooth surface.

Drilled and Slotted

A combination of slots and drilled holes are used to get the best of both worlds, offering even better heat, water, and gas dissipation, and are thus used in performance vehicles. There are drawbacks, however--not only do the many exposed edges wear down brake pads faster, but the reduction in material in these brake disc rotors also makes them more prone to cracks.

Signs of Worn or Damaged Brake Disc Rotors

Common Brake Disc Rotor Issues

It's normal for your Mazda's brake disc rotors to wear out over time through everyday driving. But, issues could also be caused by warping due to overheating, rust damage, or cracks. Be on the lookout for the following brake disc rotor issues:
1. Shaking or vibrating steering wheel
2. Screeching or loud noises when braking
3. Reduction in braking performance
4. Pulsing brake pedal
5. Scratches on the brake disc rotor surface

Impact on Braking Performance & Safety

Braking is a non-negotiable function in any vehicle. Having faulty and worn-out brake disc rotors can adversely affect braking ability and compromise your safety and that of your passengers. It would be best to deal with any suspected issues immediately before driving your Mazda again.

Maintenance Tips for Mazda Brake Disc Rotors

Multiple factors are at play regarding the lifespan of your Mazda's brake disc rotors. How long you'll get out of the rotors differs greatly based on your style of driving, the type of Mazda you drive, the conditions of your drive, and the types of rotors you use. Here are some ways to get the most use from them.

Proper Driving Habits

Premature brake disc rotor failure often results from heavy braking, which can suddenly produce excessive heat and cause warping. By driving conscientiously, such as not tailgating, you can reduce the instances where you need to apply your brakes heavily.

Using High-Quality Brake Pads

The quality of the brake pads has an impact on the braking performance of your brake disc rotors since the rotors are in direct contact with them. Higher-quality brake pads can lead to better stopping power, increased lifespan, and reduced dust and noise.

Proper Cleaning

Cleaning the brake disc rotors of the buildup of dirt and grime can increase their braking power. You can also apply an anti-rust spray to prevent rust, which can lead to uneven surfaces, vibrations, and noise.

Replacing or Resurfacing Your Brake Disc Rotor

When the brake disc rotors are cracked, warped, or worn down to a certain point, you'll have no other option but to get them replaced. Your mechanic will inspect the rotors if you are having trouble or whenever you send your Mazda for a brake pad replacement. As part of the inspection, they will measure the rotor thickness and runout, and if the rotor falls below the minimum thickness, it needs to be replaced. Otherwise, it can be resurfaced and reused.

Sourcing Mazda Brake Disc Rotors (OEM vs. Aftermarket)

Out of the factory, Mazdas will come with Original Equipment Manufacturer (OEM) brake disc rotors made by its authorized manufacturers. Aftermarket brake disc rotors are made by third-party manufacturers for Mazdas.

We recommend opting for OEM brake disc rotors. Because of the more stringent levels of manufacturing, you'll likely get better braking performance and more use out of an OEM replacement. While aftermarket brake disc rotors may be cheaper, installing them may void your Mazda's warranty and even cause damage to your car. Moreover, they might not have the same braking capability or fit into your Mazda properly. It's wiser not to take any chances when it comes down to parts that affect your safety.

Are Mazda Brake Rotors Expensive?

Mazda brake disc rotors don't cost any more than those from other brands. The main price difference will come down to the type of rotor.

Where to Buy Genuine Mazda Brake Rotors Online

Brand new genuine Mazda brake disc rotors can be purchased from your area's authorized Mazda dealers and OEM parts retailers. A more affordable alternative would be to go the second-hand route, and when you buy parts from a reputable second-hand parts dealer, you're more likely to get one in good condition but at a cheaper price. Genuine used Mazda brake disc rotors in excellent condition can be found at a great price here at BE FORWARD Auto Parts.