2021 Nissan Altima Cooling System Parts

This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator. Read more

16 Coolant / Antifreeze parts are listed for the 2021 Nissan Altima, from PRESTONE, PEAK, VALVOLINE and 4 other brands. FVP MV5050GAL carries the "Popular" badge. All of them fit every engine offered in the 2021 Altima.

The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.

In the Economy grade, FVP, PRESTONE, PEAK and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.

The Premium section lists 5 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.

The Standard Replacement section lists 6 options from BECK/ARNLEY, VALVOLINE, AISIN and 2 other brands — built to original-equipment specification. VALVOLINE 861398 is listed in this group.

This table covers the seals at the Coolant Hose / Pipe. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

This group shows a single part: MAHLE / CLEVITE GS34113.

This table covers the Coolant Hose Connector flanges. Read more

One part is listed for the 2021 Nissan Altima — FOUR SEASONS 86188.

This table covers the overflow / expansion tanks that hold extra coolant. Read more

This group shows a single part: TECHPRO NI3014136.

This table covers the caps on the overflow / expansion tank. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

3 Coolant Reservoir Cap parts for the 2021 Nissan Altima come from 3 brands — CALORSTAT, DORMAN and MOTORAD. Every part fits both the 2.0L L4 Turbocharged and the 2.5L L4.

Listed part numbers: CALORSTAT RC0184, DORMAN 54245 and MOTORAD T152.

This table covers the adapters used to pressure-test this cooling system. Read more

MOTORAD supplies both parts for the 2021 Nissan Altima. All of them fit every engine offered in the 2021 Altima.

Part numbers include MOTORAD 3121 and MOTORAD 3122.

This table covers the radiators that dump engine heat to airflow through the core. Typical signs include overheating in traffic, a wet core, or coolant that disappears with no puddle. Replace the cap if it cannot hold the rated pressure, and bleed the system after the swap. Read more

14 Radiator parts are listed for the 2021 Nissan Altima, from CSF, OSC, NISSENS and 8 other brands. CSF 3891 carries the "Popular" badge.

Economy: 2 parts, from GPD and TECHPRO. A representative part number is GPD 13858C.

The Standard Replacement section: 3 options from CSF, KOYORAD and OSC. CSF 3891 is listed in this group.

9 ungrouped parts are not assigned to a grade, with the same engine-level match.

This table covers the caps that hold system pressure at the radiator or reservoir neck. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

6 Radiator Cap parts are listed for the 2021 Nissan Altima, from SKP, CALORSTAT, MOTORAD and 1 other brand. MOTORAD T20R carries the "Popular" badge. All of them fit every engine offered in the 2021 Altima.

Listed part numbers: MOTORAD T20R, SKP SK10267 and CALORSTAT RC0050, plus the other parts above.

This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator. Read more

9 Radiator Fan Assembly parts for the 2021 Nissan Altima come from 8 brands — UAC, GPD, TECHPRO and 5 other brands. The "Popular" part is AGILITY 6010460. 1 part fits every engine; the other 8 are engine-specific.

The Economy section: 3 options from GPD, TECHPRO and VARIOUS MFR. GPD 2812050 is listed in this group.

Standard Replacement: 6 parts, from UAC, AGILITY, TYC and 2 other brands. A representative part number is AGILITY 6010460.

Listed part numbers: AGILITY 6010460, GPD 2812050 and TECHPRO NI3115165, plus the other parts above.

This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

3 Radiator Hose parts for the 2021 Nissan Altima come from GATES.

Listed part numbers: GATES 52043, GATES 52425 and GATES 52426.

This table covers the senders that report coolant temperature to the gauge or ECU. Typical signs include a gauge that sits on empty or overheat, or a lamp that does not match what the engine is doing. Rule out the cluster and the wiring before replacing the sender. Read more

11 Temperature Sender / Sensor parts are listed for the 2021 Nissan Altima, from HOLSTEIN, WALKER PRODUCTS, GPD and 6 other brands. BECK/ARNLEY 1580606 carries the "Popular" badge. 6 parts fit every engine; the other 5 are engine-specific.

Economy: 4 parts, from HOLSTEIN, GPD and ULTRA-POWER. A representative part number is GPD 1712547.

In the Full Service Kit grade, WALKER PRODUCTS supplies 1 part: grouped under the catalog's "Full Service Kit" designation — the notes column spells out what sets them apart. A representative part number is WALKER PRODUCTS 21191031.

The Standard Replacement section: 6 options from BECK/ARNLEY, HELLA, DELPHI and 3 other brands. BECK/ARNLEY 1580606 is listed in this group.

This table covers the thermostats that open the coolant circuit at the specified temperature. Typical signs include slow warm-up, a gauge that climbs in traffic, or heat that never quite arrives. Replace the housing gasket with the thermostat and bleed the system so a trapped air pocket does not cook the new part. Read more

8 Thermostat parts for the 2021 Nissan Altima come from 6 brands — MOTORAD, GATES, AISIN and 3 other brands. The "Popular" part is GATES 34162. 1 part fits every engine; the other 7 are engine-specific.

Part numbers include GATES 34162, MOTORAD 647180 and AISIN THN005, among others listed above.

This table covers the seals at the thermostat housing and water outlet. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

4 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2021 Nissan Altima, from APEX, FEL-PRO, MAHLE / CLEVITE and 1 other brand.

Listed part numbers: APEX AWO2047, FEL-PRO 35445 and MAHLE / CLEVITE K31944, plus the other parts above.

This table covers the housings and outlets the thermostat sits in. Read more

2 Thermostat Housing / Water Outlet parts for the 2021 Nissan Altima come from MOTORAD. 1 part fits every engine; the other 1 is engine-specific.

Listed part numbers: MOTORAD CH3170 and MOTORAD CH8751.

This table covers the pumps that circulate coolant through the block and radiator. Typical signs include coolant at the weep hole, pulley play, or a growl from the front of the engine. Replace the thermostat and refill with the specified coolant whenever the pump comes off. Read more

12 Water Pump parts for the 2021 Nissan Altima come from 8 brands — FVP, US MOTOR WORKS, GATES and 5 other brands. The "Popular" part is AISIN WPN117.

The Economy section: 3 options from BECK/ARNLEY, FVP and US MOTOR WORKS. BECK/ARNLEY 1312531 is listed in this group.

Standard Replacement: 5 parts, from AISIN, GATES, ACDELCO and 2 other brands. A representative part number is AISIN WPN117.

4 further parts sit outside the graded sections, with the same engine-level match.

This table covers the gaskets between the water pump and the block or housing. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

3 Water Pump Gasket parts are listed for the 2021 Nissan Altima, from APEX, FEL-PRO and MAHLE / CLEVITE.

Part numbers include APEX AWP3301, FEL-PRO 36027 and MAHLE / CLEVITE K33293.

This table covers the Water Pump housings. Read more

One part is listed for the 2021 Nissan Altima — MOTORAD CH3217.