Brake Discs

Our brake discs are built to last and perform. They’re designed to handle heat, reduce wear, and deliver reliable braking power. Fit for a wide range of vehicles, our discs help cut down on noise and vibrations, making every drive smoother. Count on us for a dependable product that’s all about quality and durability.
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ECE R90 certified brake discs

It should come as no surprise that our brake discs for new vehicles launched post 1 st November 2016 are R90 certified, alongside a range for popular older applications. After all, we’ve been meeting these quality standards for many years. The only difference today: our discs now undergo official ECE R90 testing schedules including performance, dynamic friction comparison, high load integrity and thermal fatigue analysis to certify that they perform to a prescribed tolerance of the OE part.

Learn more about Delphi’s R90 certified brake discs and why it matters.

Fully coated brake discs

Thanks to a special zinc-flake, silver Geomet coating, our coated brake discs offer greater and longer-lasting corrosion protection compared with many oil-dipped or partially painted and coated equivalents, whilst also being more cosmetically appealing. And because they have no oil to clean off, they save valuable labour and service time. All this makes for a better protected disc that’s easier to install, easier to dismount as well as being easy on the eye too.

Read more about Delphi’s coated brake discs.

High-carbon brake discs

The added carbon content in our high-carbon discs helps to both reduce the risk of thermal cracking under high-temperature loads, and allows the discs to operate at a cooler temperature, for a more consistent braking performance. It also increases their resistance to distortion or warping for added durability, while delivering noise and judder free braking.

Cross-drilled brake discs

As well as looking cool from behind your wheels, our cross-drilled discs will keep your brakes feeling the same way – cool. The cross-drilled holes dissipate heat, brake dust and gases, helping to keep the pad surface cool and clean and reducing the risk of thermal distortion and warping. These same holes also prevent a film of water forming during wet conditions for improved braked response.

Vented brake discs

Our vented discs feature special internal cooling passages to maximise airflow. By continually moving air across the disc’s surface or through the disc itself, they allow more heat to be dissipated, improving both cooling capacity and resistance to cracking from thermal shock.

Brake discs with bearings

To avoid damage to the bearing during removal, and ensure the correct pressing in into the new, we offer a range of discs with these safety critical components already pre-mounted. They also include both toothed and magnetic ABS sensor rings, as per the OE, and the relevant fixing accessories. All for quick and accurate installation.

One-piece cast iron brake discs

Our one-piece cast iron discs offer an aftermarket alternative to BMW’s patented two-piece bi-metallic composite disc. Engineered from a single piece of cast iron, they deliver the same standards of consistency, longevity and braking performance as the two-piece disc, but at a fraction of the price. And to top it off, they come with fixing screws for quicker and easier fitting.

The Delphi Difference

  • 100 years of OE experience, supplier to the world’s top automakers
  • OE heritage and knowledge built into every aftermarket part
  • Comprehensive portfolio for a wide range of vehicles and model years
  • Streamlined SKUs for easy inventory management
  • Support through tools, tips and training
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Related product resources and downloads

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1 min read

How to check brake disc runout and thickness

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Braking Diagnostics & Test Equipment Maintenance Solutions How to 1 min read

Resource Highlights

Noise and vibration complaints are often linked to brake disc condition. To diagnose these issues accurately it’s essential to measure both disc runout and disc thickness variation using the correct process and tooling. 

In this video, Phil demonstrates how to carry out these checks on an MG ZS. You’ll learn how to:

  • Check the diagnostic tool for any brake-related service or pressure release routines
  • Correctly clamp the brake disc to replicate wheel fitment
  • Use a dial test indicator (DTI) to measure disc runout
  • Measure disc thickness variation at multiple points using a micrometre
  • Compare measurements against manufacturer specifications

Why do I need to check the diagnostic tool before working on the brakes?

Some vehicles require specific brake-related routines, such as service modes or pressure release procedures, before components are removed or adjusted. Checking the diagnostic tool first helps ensure the braking system is safe to work on and prevents damage to components. 

What is the difference between disc runout and thickness variation?

Disc runout measures how much the brake disc deviates from true rotation as it spins, while thickness variation measures differences in disc thickness around its circumference. Both can contribute to brake vibration, but thickness variation is often a more direct cause of noise and judder.

What tools are needed to check brake disc condition accurately?

A dial test indicator (DTI) is used to measure disc runout, and a micrometre is used to measure disc thickness variation. Correct setup, secure disc clamping and consistent measuring technique are essential for reliable results. 

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