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The 2007 INFINITI M35 uses Zerex 1-gallon Blue 50/50 Coolant/Antifreeze. To change the coolant, start by opening the hood and locating the radiator at the front of the engine compartment with a clear or black plastic container attached, which is the coolant reservoir. It has a drain plug, fill plug, and a dipstick for measuring the coolant level. If just topping off, measure the coolant level and add more as needed. For a flush, open the drain plug and let the coolant flow into a bucket, adding water to assist in the process. Once the water runs clean, close the drain plug, fill the reservoir to the cool or cold line indicated by the dipstick, and replace the cap.
The 2007 Infiniti M35 uses Peak OET Antifreeze/Engine Coolant PAG0B3 as its coolant.