BOSCH ESI6-32N Brake Fluid Instruction Manual

1. Introduction to Bosch ESI6-32N Brake Fluid

The Bosch ESI6-32N Brake Fluid is a next-generation formulation designed for modern braking systems. It serves as a direct replacement for DOT 3, DOT 4, and DOT 5.1 brake fluids, offering enhanced performance and an extended service interval. This product is engineered to meet and exceed all relevant DOT standards, ensuring reliable and safe operation for a wide range of vehicles.

Image 1.1: Front view of the Bosch ESI6-32N Brake Fluid 1 Quart container.

2. Important Safety Information

WARNING: This product can expose you to chemicals including Ethylene Oxide, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, please visit www.P65Warnings.ca.gov.

General Directions:

1. Always follow vehicle manufacturer's recommendations when adding brake fluid.
2. Keep brake fluid clean and dry. Contamination with dirt, water, petroleum products, or other materials may result in brake failure or costly repairs.
3. Store brake fluid only in its original container. Keep container clean and tightly closed to prevent absorption of moisture.
4. CAUTION: Do not refill container, and do not use for other liquids.

Image 2.1: Side view of the Bosch ESI6-32N Brake Fluid container showing safety warnings and handling instructions.

3. Product Features

• High Compatibility: Use with or as a direct replacement for DOT 3, DOT 4, and DOT 5.1 brake fluids.
• Extended Service Interval (ESI): Lasts 100% longer than DOT 3, 50% longer than DOT 4, and 10% longer than DOT 5.1.
• Exceeds Standards: Surpasses all DOT 3, DOT 4, and DOT 5.1 standards.
• Optimized Performance: Features a wet boiling point of 365°F and a viscosity at -40°C of 685mm²/s.
• Universal Fit: Designed for universal application across various vehicle types.

Image 3.1: DOT Chart showing minimum safety requirements for different brake fluids based on boiling points and viscosity. Bosch ESI6 is designed for modern ESP systems.

4. Compatibility

Bosch ESI6-32N Brake Fluid offers broad compatibility, making it a versatile choice for many vehicles. It is specifically formulated to be a direct replacement for DOT 3, DOT 4, and DOT 5.1 brake fluids. However, it is crucial to note that it is NOT compatible with DOT 5 (silicone-based) brake fluid.

Image 4.1: Side view of the Bosch ESI6-32N Brake Fluid container displaying a compatibility chart for various DOT standards.

Compatibility Chart:

5. Setup and Preparation

Before replacing or topping off your brake fluid, ensure your vehicle is on a level surface and the engine is off. Gather all necessary tools, including a brake fluid bleeder kit, clean rags, and appropriate personal protective equipment (gloves, eye protection). Always refer to your vehicle's service manual for specific instructions regarding brake fluid reservoir location and bleeding procedures.

6. Operating Instructions (Brake Fluid Replacement)

Brake fluid replacement, also known as a brake fluid flush, is a critical maintenance task. The general procedure involves removing old fluid from the reservoir, filling with new fluid, and then bleeding each brake caliper to remove air and old fluid from the lines. Always start with the caliper furthest from the master cylinder and work your way closer.

General Steps:

1. Siphon out as much old brake fluid from the master cylinder reservoir as possible.
2. Fill the reservoir with new Bosch ESI6-32N Brake Fluid.
3. Attach a clear hose to the bleeder valve of the furthest caliper (e.g., right rear) and place the other end in a catch bottle.
4. With assistance, have someone slowly press the brake pedal while you open the bleeder valve. Close the valve before the pedal reaches the floor. Repeat until clean, bubble-free fluid flows.
5. Repeat the bleeding process for all remaining calipers (e.g., left rear, right front, left front), ensuring the master cylinder reservoir never runs dry.
6. Top off the master cylinder reservoir to the MAX line with Bosch ESI6-32N Brake Fluid.

7. Maintenance

Regular brake fluid maintenance is crucial for optimal braking performance and safety. While standard brake fluid typically has a recommended change interval of 2 years, Bosch ESI6-32N Brake Fluid offers an extended service interval.

• The recommended change interval for Bosch ESI6-32N is 3 years.
• Periodically check the brake fluid level in the master cylinder reservoir and top off if necessary, using only Bosch ESI6-32N Brake Fluid.
• Inspect the fluid for discoloration or debris. Dark or cloudy fluid indicates contamination and requires immediate replacement.

8. Troubleshooting Common Brake Fluid Issues

Proper brake fluid is essential for effective braking. Issues can arise from contaminated or old fluid, leading to reduced braking performance.

• Spongy Brake Pedal: Often indicates air in the brake lines or contaminated fluid. A brake fluid flush and bleed is usually required.
• Reduced Braking Effectiveness (Brake Fade): Can occur when brake fluid overheats and boils, creating compressible vapor bubbles. This is more likely with old, water-contaminated fluid. Bosch ESI6's high wet boiling point helps mitigate this.
• Brake System Corrosion: Water contamination in brake fluid can lead to corrosion of internal brake components. Regular fluid changes prevent this.

9. Technical Specifications

10. Warranty and Support

For specific warranty information or technical support regarding your Bosch ESI6-32N Brake Fluid, please contact Bosch Automotive directly. You can find more information and contact details on their official website.

Official Bosch Automotive Website: www.boschautoparts.com

For product inquiries, you may also visit: www.boschautoparts.us