2021 Nissan Altima Fluid Type Specs

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil	SAE 0W-20, API SP/ILSAC GF-6B	4.3 – 4.8 quarts (with filter, depending on engine)
Engine Coolant	Nissan Genuine Long Life Antifreeze/Coolant (Blue), Phosphate-based OAT	7.9 – 9.2 quarts (depending on engine/configuration)
Transmission Fluid (CVT)	Nissan Genuine NS-3 CVT Fluid	8.8 – 9.4 quarts (total fill, consult manual for drain/refill)
Brake Fluid	DOT 3	N/A
Power Steering Fluid	Electric Power Steering (No user-serviceable fluid)	N/A
Windshield Washer Fluid	Nissan Genuine Windshield Washer Fluid or equivalent quality fluid	2.6 quarts

Engine Oil

The 2021 Nissan Altima requires SAE 0W-20 engine oil meeting API SP or ILSAC GF-6B standards. The specific capacity varies slightly depending on the engine. The 2.5L four-cylinder engine generally holds around 4.8 quarts with a new filter, while the 2.0L VC-Turbo engine typically requires 4.3 quarts with a new filter. Always refer to your owner's manual for the precise capacity for your specific vehicle configuration. Using the correct viscosity and specification is crucial for optimal engine lubrication, fuel economy, and to prevent premature wear. Nissan specifically recommends against using oil additives, as they can interfere with the engine's lubrication system and potentially cause damage.

For most driving conditions, a change interval of 5,000 miles or 6 months is recommended, whichever comes first. However, if you frequently drive in severe conditions (e.g., short trips, extreme temperatures, dusty environments, or heavy towing), more frequent oil changes may be necessary. Always verify your specific maintenance schedule in your owner's manual.

Engine Coolant

The 2021 Nissan Altima utilizes Nissan Genuine Long Life Antifreeze/Coolant (Blue). This is a phosphate-based Organic Acid Technology (OAT) coolant. It's crucial to use this specific type of coolant or an equivalent that meets Nissan's specifications. Mixing different types of coolants, especially OAT with other technologies like HOAT or conventional green coolants, can lead to chemical reactions that may cause gel formation, corrosion, and severe damage to the cooling system components, including the radiator, water pump, and heater core. Always perform a complete flush and refill if you are unsure of the coolant type previously used or if switching brands.

The typical service interval for Nissan's long-life coolant is every 60,000 miles or 60 months, whichever comes first, for the first replacement, and then every 30,000 miles or 30 months thereafter. However, it's always best to consult your owner's manual for the exact recommended service interval for your vehicle.

Transmission Fluid (CVT)

The 2021 Nissan Altima is equipped with a Continuously Variable Transmission (CVT) and requires Nissan Genuine NS-3 CVT Fluid. Using any other type of transmission fluid can lead to serious and irreversible damage to the CVT, resulting in costly repairs. The CVT is a complex component, and its proper function relies heavily on the specific friction modifiers and properties of the NS-3 fluid. Never use universal ATF or other conventional automatic transmission fluids in a Nissan CVT.

The total fill capacity for the CVT is approximately 8.8 to 9.4 quarts. However, a typical drain and refill will only replace a portion of the fluid. For accurate fill levels and proper servicing, it is highly recommended to have CVT fluid changes performed by a qualified technician who can ensure the correct fluid level and temperature during the procedure. Refer to your owner's manual for recommended inspection and replacement intervals. Nissan typically recommends inspecting the CVT fluid during routine maintenance and replacing it under severe driving conditions.

Brake Fluid

The 2021 Nissan Altima uses DOT 3 brake fluid. It is essential to use a high-quality DOT 3 fluid from a sealed container to prevent moisture contamination. Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. This absorbed moisture lowers the fluid's boiling point, which can lead to a spongy brake pedal and reduced braking effectiveness, especially under heavy braking conditions. It can also cause corrosion within the brake system components.

Nissan typically recommends inspecting the brake fluid level and condition at every service interval. While there isn't a universally strict replacement interval, many manufacturers suggest flushing the brake system every 2-3 years, regardless of mileage, to remove accumulated moisture and contaminants. This helps maintain optimal braking performance and prolong the life of brake system components.

Power Steering Fluid

The 2021 Nissan Altima is equipped with an electric power steering system. This means there is no traditional hydraulic power steering pump or fluid reservoir that requires user maintenance or fluid replacement. The system is electronically controlled, providing assistance with an electric motor. Therefore, there is no power steering fluid to check or change.

Windshield Washer Fluid

For the 2021 Nissan Altima, it is recommended to use Nissan Genuine Windshield Washer Fluid or an equivalent quality fluid. Avoid using plain water, especially in colder climates, as it can freeze and damage the washer fluid reservoir, pump, and lines. Some washer fluids also contain additives that help prevent streaking, remove bugs, and even de-ice the windshield in winter conditions. The reservoir typically holds around 2.6 quarts. Always keep the reservoir topped off for clear visibility.

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