
The 2011 Taurus requires Motorcraft Yellow Prediluted Antifreeze/Coolant, specifically labeled with part number 41JN66D. This is a phosphate-free, silicate-free, and nitrite-free (PSN) formula that meets Ford specification WSS-M97B57-A2. Using the correct coolant is non-negotiable for protecting your engine from corrosion, scaling, and freeze/boil-over damage.
Never mix different coolant colors or chemistries. The Motorcraft Yellow coolant is designed for the specific metals and materials (including aluminum) in your Taurus's cooling system. Mixing can cause gel-like formations that clog the radiator and heater core, leading to costly repairs.
For a full system replacement or flush, you will need approximately 13.5 quarts (12.8 liters). Always ensure the cooling system is filled to the proper level in the degas bottle (coolant reservoir) when the engine is cold. For precise topping off, use only the prediluted version to maintain the proper 50/50 mix with deionized water. If you must use a concentrate, dilute it only with distilled or deionized water to prevent mineral deposits.

Just had to deal with this on my own 2011 Taurus. You want the Motorcraft Yellow Prediluted coolant. The bottle will say 41JN66D right on it. I grabbed mine from the dealership parts counter to be sure. Don't gamble with generic stuff—this engine needs the specific formula. Pour it right into the coolant reservoir when the engine is stone cold.

Look for the specification, not just the color. Your Taurus needs a coolant that meets WSS-M97B57-A2. Motorcraft's product satisfying this is their Yellow Prediluted Antifreeze. This particular chemistry protects the aluminum components and prevents silicate dropout. Using an incorrect type, even if it's another "yellow" coolant from an auto parts store, risks gradual damage to the water pump and radiator.

As an owner who's done this job, here’s the simple breakdown: Get Motorcraft 41JN66D. It's the exact match. The system holds a lot, over 13 quarts, so you might need two gallons for a flush. Always use prediluted for top-ups—it takes the guesswork out of mixing. Check the level in the translucent reservoir; it should be between the MIN and MAX marks when the engine is cool. Keeping it correct prevents overheating headaches.

My mechanic stressed that the factory fill in these models is critical to maintain. The required Motorcraft Yellow PSN coolant is formulated for extended life and specific protection. Sticking with it avoids the sludge that can form from mixing chemistries, which is a common and expensive fix. I keep a spare bottle of the 41JN66D prediluted formula in the garage for minor top-offs. It’s a small investment for preserving the cooling system’s health and avoiding repair bills that can run into the thousands.


