After the brake pads, the brake disc rotors are the part of your Nissan's braking system that will require the most frequent replacement. Each of its wheels is fitted with a brake disc rotor, on which the brake pads clamp down when you press the brake pedal. Brake disc rotors can come in a number of designs, including the two-piece rotors typically available only in the aftermarket but which can be found in certain Nissans. Ensuring that yours are in good working condition will allow you to slow down and stop your Nissan effectively.

The Function of Nissan Brake Disc Rotors

Role in the Braking System

If your Nissan uses disc brakes for all its wheels, it will have a total of four brake disc rotors, one connected to each wheel. Stepping on the brake pedal to activate the brakes causes the brake pads to press against the brake disc rotors and convert the wheels' kinetic energy (movement) into thermal energy, thereby slowing your wheels down through friction.

Nissan Brake Disc Rotor Design Types

Brake disc rotors come in a variety of designs, and the type of brake disc rotors used can even differ in the same year. They can either be a solid piece or vented, and the rotor's surface can either be smooth, drilled, or slotted, or even a mix of drilled and slotted. Besides these brake disc rotor designs, Nissan also produces two-piece rotors, such as those for the front wheels of the Altima Nismo 370Z.

Solid or Vented

Solid disc brakes are just as their name describes. These are the basic type of disc brakes that come in one solid piece 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 are better able to keep within optimum temperatures and are thus usually the standard for performance models.

Smooth, Slotted or Drilled Rotor Surface

The rotor surface can either be completely smooth or be 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 are able to 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.

Two-Piece Rotors

Unlike typical rotors, which are single pieces made from cast iron, two-piece rotors, also known as floating disc assemblies, feature a cast iron ring and an aluminum centerpiece. This construction results in a lighter weight, better heat dissipation, increased airflow, lower risk of warping, and even a lower cost to replace since each of the pieces can be changed out individually.

Signs of Worn or Damaged Brake Disc Rotors

Common Brake Disc Rotor Issues

Normal driving is enough to wear down your brake disc rotors over time. But, issues could also be caused by warping due to overheating, rust damage, or cracks. These are some of the most common 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

Faulty or worn-out brake disc rotors can severely reduce the braking ability of your Nissan and put your and your passengers' safety at risk. Any suspected issues should be dealt with immediately before driving your Nissan again.

Maintenance Tips for Nissan Brake Disc Rotors

Proper Driving Habits

The large amount of heat produced when braking suddenly can cause warping. By driving conscientiously, such as not tailgating, you can reduce the instances where you will need to apply your brakes heavily.

Using High-Quality Brake Pads

The quality of the brake pads has an impact on the longevity and braking performance of your brake discs. Higher-quality brake pads can lead to better stopping power, increased lifespan, and reduced dust and noise.

Proper Cleaning

Clean brake discs will have better 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

There's no avoiding replacing the brake disc rotors if they are cracked, warped, or worn down to a certain point. Your mechanic will inspect the rotors if you are having trouble or whenever you send your Nissan 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 Nissan Brake Disc Rotors (OEM vs. Aftermarket)

Brand new Nissans come with Original Equipment Manufacturer (OEM) brake disc rotors made by its authorized manufacturers. Nissan brake disc rotors made by third-party manufacturers and usable in Nissans fall under the "Aftermarket" parts category.

We recommend investing in original Nissan brake disc rotors to return your car to its original level of performance. Because of the more stringent levels of manufacturing, you'll likely get better braking performance and more use out of an OEM replacement. While some aftermarket rotors might be cheaper, installing them might void your Nissan's warranty and even cause damage to your car. Moreover, some aftermarket brake disc rotors might not be well-made and not fit into your Nissan properly. With safety-related parts like the brake disc rotors, it's prudent to avoid taking chances and to go with the original.

Are Nissan Brake Rotors Expensive?

Nissan brake disc rotors are no more pricey than those from other car brands. However, the design of your brake disc rotors will mainly determine how expensive they are.

Where to Buy Genuine Nissan Brake Rotors Online

Look to your country's Nissan dealers and OEM parts retailers for genuine brake rotors. For an affordable alternative, consider buying used brake disc rotors that are in good condition. With such a part, it's recommended that you purchase them from a trusted dealer like BE FORWARD Auto Parts.