Brake Discs

The mechanical and thermal stresses acting on the brake disc are extremely high. So it’s important they’re up to the job, and perform just as intended. Like all of our braking products, our discs are made to mirror the OE. So whatever the technology, you can be assured that every Delphi disc has been designed, engineered and manufactured to provide the very best braking performance. Just like the OE. Be it coated, cross drilled or high-carbon…it’s a given.

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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Resource Highlights

In this article you will find out about, why Delphi brake pads registered noise over 70db on only 1 out of every 1000 times.

We’re shouting loud about our recent noise tests. Why? Because it’s the only noise you’re going to hear from Delphi brake pads!

You know that screech that can happen when you pull up at a red light and other drivers look over at you in disdain? Well that’s brake noise. It can range anywhere from a mild annoyance to an intolerable squeal. It’s also one of the biggest sources of customer comebacks for any garage. Yet, unfortunately is often one of the most difficult issues to solve. So we tested eight different pads – Delphi, the OE and six other leading aftermarket brands to the industry benchmark SAEJ2521 noise test – to understand the true extent of the problem. The results speak volumes.

On the noise index section of SAEJ2521, where seven or below is audible and ten is silent, the Delphi pads recorded a near-silent 9.6, half a point ahead of the next best brands. In sharp contrast, four brands registered below seven, and can therefore be considered noisy.

More importantly, the Delphi pad registered noise above 70db, the threshold where brake noise can be heard, on only 0.1 percent of occasions. To give you an idea of just how good this is, the limit for noise tolerance at 70db, as defined by vehicle manufacturers, is ten percent - 9.9 percent more than the Delphi pad. The average number of noise occurrences above 70 db across the other brands was eight percent, with two brands exceeding the OE limits at 15.6 and 23.8 percent.

As the tests prove, the best way to prevent brake noise is by using OE quality brake pads with proven noise reducing technologies, just like Delphi. Every one of our pads incorporates a special OE underlayer. The three mm layer of noise-absorbing friction material helps to significantly reduce noise occurrences above 70db, or as in this instance, virtually eliminate them. Our pads also feature multi-layered noise dampening shims and OE configured chamfers, as per the OE.

Test Criteria:

  • SAEJ2521 Noise Test.
  • Front axle tested.
  • Car: VW Passat Variant.
  • Engine: 2.0 TSI.
  • Weight: 2168 kg total.
  • Rolling radius: 0,308 m.
  • Max. speed: 137 mph.

See how Delphi outperformed the competition in other key tests – stopping distances, wear and wet braking.

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