2021 Mazda CX-5 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

18 Coolant / Antifreeze parts are listed for the 2021 Mazda CX-5, from PRESTONE, PEAK, VALVOLINE and 4 other brands. FVP MV5050GAL carries the "Popular" badge. All of them fit every engine offered in the 2021 CX-5.

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 Heavy Duty section lists 1 option from PRESTONE — rated for severe service. PRESTONE AFC12100 is listed in this group.

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 7 options from VALVOLINE, BECK/ARNLEY, 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

3 Coolant Hose / Pipe Seal parts for the 2021 Mazda CX-5 come from 2 brands — MAHLE / CLEVITE and AJUSA. 1 part fits every engine; the other 2 are engine-specific.

Part numbers include AJUSA 16564000, MAHLE / CLEVITE C33805 and MAHLE / CLEVITE C33644.

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

2 Coolant Reservoir parts for the 2021 Mazda CX-5 come from 2 brands — DORMAN and TECHPRO.

Part numbers include DORMAN 603963 and TECHPRO MA3014125.

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

2 Coolant Reservoir Cap parts for the 2021 Mazda CX-5 come from 2 brands — CALORSTAT and MOTORAD. 1 part fits every engine; the other 1 is engine-specific.

Part numbers include CALORSTAT RC0204 and MOTORAD T112.

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

One part is listed for the 2021 Mazda CX-5 — MOTORAD 3121.

This table covers the intercoolers that cool turbo or supercharger charge air. Read more

4 Intercooler parts are listed for the 2021 Mazda CX-5, from GPD, NISSENS, TECHPRO and 1 other brand. 2 parts fit every engine; the other 2 are engine-specific.

Part numbers include GPD 2711337, NISSENS 961545 and TECHPRO MA3012100, among others listed above.

This table covers the gaskets that seal the Intercooler. 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

This group shows a single part: MAHLE / CLEVITE GS34075.

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 Mazda CX-5, from TECHPRO, CSF, KOYORAD and 7 other brands. CSF 3766 carries the "Popular" badge. 1 part fits every engine; the other 13 are engine-specific.

Economy: 3 parts, from TECHPRO and GPD. A representative part number is GPD 13659C.

The Standard Replacement section: 11 options from CSF, KOYORAD, UAC and 5 other brands. CSF 3766 is listed in this group.

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 Mazda CX-5, from CALORSTAT, MOTORAD, DORMAN and 1 other brand. MOTORAD T16R carries the "Popular" badge. 4 parts fit every engine; the other 2 are engine-specific.

The Locking Replacement section lists 2 options from CALORSTAT and MOTORAD — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. CALORSTAT RC0212 is listed in this group.

The Standard Replacement section: 4 options from MOTORAD, CALORSTAT, DORMAN and 1 other brand. MOTORAD T16R is listed in this group.

This group includes MOTORAD T16R, CALORSTAT RC0212 and MOTORAD ST16R and the remaining parts above.

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

8 Radiator Fan Assembly parts for the 2021 Mazda CX-5 come from 7 brands — UAC, GPD, TECHPRO and 4 other brands. The "Popular" part is FOUR SEASONS 75184. 3 parts fit every engine; the other 5 are engine-specific.

The Economy section: 2 options from GPD and TECHPRO. GPD 2812261 is listed in this group.

Standard Replacement: 6 parts, from UAC, FOUR SEASONS, AGILITY and 2 other brands. A representative part number is FOUR SEASONS 75184.

Listed part numbers: FOUR SEASONS 75184, GPD 2812261 and TECHPRO MA3115175, plus the other parts above.

This table covers the Radiator Fan motors. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

One part is listed for the 2021 Mazda CX-5 — ACKOJA A32010011.

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

4 Radiator Hose parts for the 2021 Mazda CX-5 come from 2 brands — GATES and CONTINENTAL.

This group includes CONTINENTAL 60425, GATES 51874 and GATES 52061 and the remaining parts above.

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

8 Temperature Sender / Sensor parts are listed for the 2021 Mazda CX-5, from GPD, HOLSTEIN, DELPHI and 5 other brands. GPD 1712514 carries the "Popular" badge. All of them fit every engine offered in the 2021 CX-5.

Economy: 2 parts, from GPD and HOLSTEIN. A representative part number is GPD 1712514.

The Standard Replacement section: 6 options from DELPHI, BECK/ARNLEY, FACET and 3 other brands. DELPHI TS10289 is listed in this group.

This group includes GPD 1712514, HOLSTEIN 2CTS0413 and DELPHI TS10289 and the remaining parts above.

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 Mazda CX-5 come from 6 brands — MOTORAD, SKP, BECK/ARNLEY and 3 other brands. The "Popular" part is MOTORAD 7204160. 4 parts fit every engine; the other 4 are engine-specific.

The Economy section: 1 option from SKP. SKP SKTA9249 is listed in this group.

Premium: 1 part, from MOTORAD. A representative part number is MOTORAD 7204160.

Standard Replacement: 6 parts, from MOTORAD, BECK/ARNLEY, AISIN and 2 other brands. A representative part number is BECK/ARNLEY 1430960.

Listed part numbers: MOTORAD 7204160, SKP SKTA9249 and BECK/ARNLEY 1430960, plus the other parts 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

8 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2021 Mazda CX-5, from MAHLE / CLEVITE and FEL-PRO. FEL-PRO 36216 carries the "Popular" badge. 2 parts fit every engine; the other 6 are engine-specific.

Listed part numbers: FEL-PRO 36216, MAHLE / CLEVITE C33695 and FEL-PRO 36184, plus the other parts above.

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

4 Thermostat Housing / Water Outlet parts for the 2021 Mazda CX-5 come from 2 brands — MOTORAD and FOUR SEASONS. 1 part fits every engine; the other 3 are engine-specific.

Listed part numbers: FOUR SEASONS 86338, MOTORAD CH3147 and MOTORAD CH3098, plus the other parts above.

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

10 Water Pump parts for the 2021 Mazda CX-5 come from 6 brands — FVP, DAYCO, GATES and 3 other brands. The "Popular" part is BECK/ARNLEY 1312543. 3 parts fit every engine; the other 7 are engine-specific.

The Economy section: 2 options from BECK/ARNLEY and FVP. BECK/ARNLEY 1312543 is listed in this group.

Standard Replacement: 8 parts, from DAYCO, GATES, GMB and 2 other brands. A representative part number is DAYCO DP1899B.

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 Mazda CX-5, from BECK/ARNLEY, FEL-PRO and MAHLE / CLEVITE. All of them fit every engine offered in the 2021 CX-5.

Part numbers include BECK/ARNLEY 0394193, FEL-PRO 36188 and MAHLE / CLEVITE C33643.