I-CAR Just In Time: DOT 4 Brake Fluid

I-CAR · May 12, 2025

Summary

This I-CAR Just In Time video highlights the critical differences between DOT 4 brake fluids, specifically Class 6 and Class 7. It emphasizes that these fluids are not interchangeable and that technicians must consult vehicle-specific OEM service information to ensure the correct fluid is used during service.

What to do on the job

Always consult vehicle-specific OEM service information to identify and use the exact class of DOT 4 brake fluid (such as Class 6 or Class 7) specified by the manufacturer.

How to use it

Use this document to justify the sourcing and billing of specific OEM-mandated DOT 4 Class 6 or Class 7 brake fluids rather than using generic, non-classified DOT 4 fluids during brake system bleeding or repairs.

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