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What type of brake fluid does a 2009 Ford Flex take?

The 2009 Ford Flex requires DOT 3 brake fluid.

For the full specification, consult the owner's manual or the brake fluid reservoir cap. The system uses a glycol-based DOT 3 fluid that should meet FMVSS 116; silicone-based DOT 5 is not compatible with this braking system. When topping up or replacing fluid, ensure you use the correct grade and follow proper flushing procedures if you change fluid type or perform a full brake service.

Brake fluid specification and compatibility

Key details about the correct fluid type, compatibility, and cautions for the 2009 Ford Flex.

Fluid type: DOT 3 brake fluid that meets FMVSS 116 standards (glycol-based).

Do not use silicone-based DOT 5 brake fluid in this system, as it can cause compatibility problems with ABS/ESP components.

DOT 3 and DOT 4 are glycol-based, but Ford’s specification for the Flex is DOT 3; if you need to change fluid type, perform a complete system flush and consult a dealer or manual.

Follow the maintenance schedule in the owner's manual to replace or flush brake fluid at recommended intervals to prevent moisture buildup and corrosion.

To confirm the exact grade, check the brake fluid reservoir cap or the owner's manual. If unsure, contact a Ford dealer or a certified mechanic before servicing the brakes.

Maintenance and handling tips

Guidance on safe handling and proper maintenance when dealing with brake fluid in the 2009 Ford Flex.

Use clean, fresh DOT 3 brake fluid from a reputable brand.

Bleed or flush the brake system as part of maintenance or fluid replacement; avoid reusing old fluid.

Dispose of used brake fluid according to local hazardous waste guidelines and keep spills away from painted surfaces.

Adhering to these practices helps maintain braking performance and protects the ABS system from moisture-related issues.

Summary: For a 2009 Ford Flex, use DOT 3 brake fluid (glycol-based, FMVSS 116 compliant). Do not use DOT 5 silicone-based fluid. Always verify on the reservoir cap or in the owner's manual, and follow proper flushing and maintenance procedures.

Does my car need DOT 3 or dot 4 brake fluid?

Daily driving or commuting – DOT 3 is typically sufficient for light, everyday use where brake temperatures stay moderate. Towing, heavy loads, or mountainous driving – DOT 4 or DOT 5.1, with their higher boiling points, are better suited for these conditions to prevent brake fade.

Does Ford use DOT 3 brake fluid?

Ford Genuine Ford Fluid PM-1-C High Performance DOT-3 Motor Vehicle Brake Fluid - 12 oz.

Is it okay to mix DOT 3 and dot 4 brake fluid?

Yes, you can mix DOT 3 and DOT 4 brake fluid, as they are chemically compatible, but you should never mix them with DOT 5. Mixing DOT 3 and DOT 4 is acceptable because both are glycol-based. Adding DOT 4 to DOT 3 will lower its boiling point, while adding DOT 3 to DOT 4 will lower its boiling point.
This video explains the differences between DOT 3 and DOT 4 brake fluid and whether they can be mixed: 1mHVAC Mechanic YouTube · Dec 28, 2021
Compatibility and mixing

DOT 3 and DOT 4: These are compatible and can be mixed without causing harm to the braking system.
DOT 3, 4, and 5.1: These are all compatible with each other and can be mixed.
DOT 5: This is silicone-based and is not compatible with DOT 3, DOT 4, or DOT 5.1. Mixing them will cause the system to fail.

What to consider when mixing

Boiling point: DOT 4 has a higher boiling point than DOT 3. Mixing them will lower the overall boiling point of the fluid in your system.
Performance: If your car requires DOT 4 and you mix it with DOT 3, you will reduce the braking system's performance.
Best practice: It is best to check your vehicle's manual and use the specific DOT fluid recommended for your car. If you need to upgrade to DOT 4, it is best to completely flush the old DOT 3 fluid out first to get the full benefits of the DOT 4 fluid.

This video explains what happens when you mix DOT 3 and DOT 4 brake fluids: 50sMotor MatchupsYouTube · Jan 2, 2024

What kind of brake fluid does a 2009 Ford Flex take?

Prestone DOT 3 brake fluid.

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.