Bosch ESI6: The Next Generation Brake Fluid

Modern brake systems, such as those featuring ABS and ESP®, are designed for improved performance to safely stop vehicles. With improved performance comes a higher load on the braking systems. These systems require a brake fluid with a high wet boiling point, low viscosity, and high lubricity.

As a vehicle system developer and the first to market ABS and inventor of ESP®, Bosch understands the need for a high quality brake fluid.

Bosch ESI6 is the next generation brake fluid. It exceeds all current DOT standard requirements (FMVSS 116).

Best value on the shelf:

  • First to simultaneously combine both low viscosity and high wet boiling point at its operation
  • Longer lasting: 100% longer than DOT 3, 50% longer than DOT 4, and 10% longer than DOT 5.1 (with 30% lower viscosity)
  • ESI coverage includes the majority of all brake systems launched since 1990; Use with DOT 3, DOT 4, or DOT 5.1; Coverage excludes DOT 5 silicone based brake fluid which is limited to military and racing applications
  • Excellent lubricity properties to prevent wear of components in the brake system and reduce noise

ESI6 contributes to the high performance and service life of modern brake systems with its high dynamic properties. For over two years, it has undergone sophisticated testing geared towards new versions of ABS and ESP® systems in
our Bosch development center in Abstatt, Germany.

ESI6 brake fluid has been subject to intense testing of both system pressure build-up and wear and noise at extreme temperatures.

ESI6 is subject to chemical testing in the development center laboratory.

ESI6 Laboratory Results:

ESI6 available in 1 QT. cans. Part Number: ES6-32N

CriteriaDOT 3DOT 4DOT 4 LVDOT 5.1ESI6
Dry boiling point (°F)401446482500~ 518
Wet boiling point (°F)284311329356~ 365
Viscosity at -40°F (mm²/ѕ)15001800750900~ 670

High lubricity, less corrosion and wear – the advantages of ESI6:

  • One size fits all: As Bosch ESI6 can be used to substitute almost all previously used brake fluids, e.g. DOT 3, DOT 4, DOT 5.1 (except LHM), it fits practically any brake system launched since 1990.
  • Bosch ESI6 helps reduce the stock of brake fluids thus saving storage space.
  • Featuring replacement intervals of 3 years, Bosch ESI6 high-grade brake fluids last much longer than standard DOT 3 brake fluids (to be replaced every year and a half).
  • Bosch ESI6 reduces corrosion within the brake system and its high lubricity prevents noises and wear inside ABS and ESP® systems.

Jimmy Finch

Dallas Branch Manager, M&D Distributors

Jimmy Finch has over 33 years of experience in Diesel Engine Sales, Service and Repair. His experience started early in life at Texas Fuel Injection Service (an early acquisition of M&D) as a job with a means to an end. Somewhere in that 33 years this job turned into a fulfilling career. He started in the injector clean up department and has held practically every position leading up to his current role as Branch Manager of the Dallas, Texas location.

In his spare time, Jimmy enjoys spending time with his wife of 24 years, Priscilla. They are currently getting ready to make their way into the empty-nesters stage of life. He also enjoys the occasional hunting trip with friends and family and chasing down potential customers by the names off their trucks.

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