ISO 4925 CLASS 3

ISO 4925 Class 3 is an international standard that defines the requirements for brake fluids that meet the performance level of DOT 4. Fluid certified to this class provides high thermal resistance, resistance to moisture absorption, and effective braking at high temperatures, making it suitable for passenger and commercial vehicles with an active driving style. When selecting a fluid according to OEM specifications, be sure that your vehicle manufacturer requires ISO 4925 Class 3, as using a fluid of a lower class can shorten the service life of the brake system and reduce safety. This class is often listed in technical documents as DOT 4, so it is suitable for most modern brake systems, including those that use the premium synthetic fluid X‑BRAKE.