2021 Honda Accord 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 Honda Accord, from PRESTONE, PEAK, VALVOLINE and 4 other brands. FVP MV5050GAL carries the "Popular" badge.

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

4 Coolant Hose / Pipe Seal parts for the 2021 Honda Accord come from 3 brands — AJUSA, MAHLE / CLEVITE and VICTOR REINZ.

Part numbers include AJUSA 16022400, AJUSA 16022450 and MAHLE / CLEVITE C32870, among others listed above.

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

2 Coolant Reservoir parts for the 2021 Honda Accord come from 2 brands — LARES and TECHPRO.

Part numbers include LARES 37342 and TECHPRO HO3014139.

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 Honda Accord come from 2 brands — CALORSTAT and MOTORAD.

This group includes CALORSTAT RC0174 and MOTORAD T108.

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

One part is listed for the 2021 Honda Accord — GATES 31409.

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

5 Intercooler parts are listed for the 2021 Honda Accord, from TYC, AGILITY, GPD and 2 other brands. TYC 18108 carries the "Popular" badge.

Part numbers include TYC 18108, AGILITY 5010023 and GPD 2711333, among others listed above.

This table covers the Intercooler Air Hose pipes. Read more

One part is listed for the 2021 Honda Accord — GATES 26567.

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

8 Radiator parts are listed for the 2021 Honda Accord, from CSF, TYC, AGILITY and 5 other brands. CSF 3851 carries the "Popular" badge.

Part numbers include CSF 3851, TYC 13674 and AGILITY 8013674, among others listed above.

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

5 Radiator Cap parts are listed for the 2021 Honda Accord, from MOTORAD, GATES, CALORSTAT and 1 other brand. GATES 31412 carries the "Popular" badge.

The Locking Replacement section lists 1 option from MOTORAD — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. MOTORAD ST37 is listed in this group.

The Standard Replacement section: 4 options from GATES, CALORSTAT, MOTORAD and 1 other brand. GATES 31412 is listed in this group.

Listed part numbers: GATES 31412, MOTORAD ST37 and CALORSTAT RC0040, plus the other parts above.

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

5 Radiator Fan Assembly parts for the 2021 Honda Accord come from 4 brands — UAC, GPD, VARIOUS MFR and 1 other brand. The "Popular" part is TYC 601580.

The Economy section: 2 options from GPD and VARIOUS MFR. GPD 2811994 is listed in this group.

Standard Replacement: 3 parts, from UAC and TYC. A representative part number is TYC 601580.

Listed part numbers: TYC 601580, GPD 2811994 and VARIOUS MFR HO3115172, 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

4 Radiator Hose parts for the 2021 Honda Accord come from 2 brands — CONTINENTAL and GATES.

Listed part numbers: CONTINENTAL 66029, CONTINENTAL 67344 and GATES 51842, plus the other parts above.

This table covers the Radiator Mount bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles. Read more

2 Radiator Mount Bushing parts for the 2021 Honda Accord come from DORMAN.

Part numbers include DORMAN 927240 and DORMAN 927241.

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

13 Temperature Sender / Sensor parts are listed for the 2021 Honda Accord, from STANDARD MOTOR PRODUCTS, HOLSTEIN, BECK/ARNLEY and 7 other brands. STANDARD MOTOR PRODUCTS TX215T carries the "Popular" badge.

Economy: 6 parts, from HOLSTEIN, STANDARD MOTOR PRODUCTS, CALORSTAT and 2 other brands. A representative part number is STANDARD MOTOR PRODUCTS TX215T.

The Standard Replacement section: 7 options from BECK/ARNLEY, STANDARD MOTOR PRODUCTS, WELLS and 3 other brands. STANDARD MOTOR PRODUCTS TX215 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

6 Thermostat parts for the 2021 Honda Accord come from 6 brands — AUTOTECNICA, AISIN, MOTORAD and 3 other brands. The "Popular" part is AISIN THH019.

The Economy section: 1 option from AUTOTECNICA. AUTOTECNICA HA0720911 is listed in this group.

Standard Replacement: 5 parts, from AISIN, MOTORAD, BECK/ARNLEY and 2 other brands. A representative part number is AISIN THH019.

This group includes AISIN THH019, AUTOTECNICA HA0720911 and MOTORAD 1416172 and the remaining 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

6 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2021 Honda Accord, from FEL-PRO, MAHLE / CLEVITE, AJUSA and 1 other brand. FEL-PRO 35741 carries the "Popular" badge.

This group includes FEL-PRO 35741, MAHLE / CLEVITE C32021 and AJUSA 01129500 and the remaining parts above.

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

This group shows a single part: MOTORAD CH2168.

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

8 Water Pump parts for the 2021 Honda Accord come from 8 brands — JAPANESE OE, US MOTOR WORKS, BECK/ARNLEY and 5 other brands. The "Popular" part is JAPANESE OE FWH030.

The Economy section: 4 options from JAPANESE OE, US MOTOR WORKS, BECK/ARNLEY and 1 other brand. JAPANESE OE FWH030 is listed in this group.

Standard Replacement: 4 parts, from AISIN, DAYCO, GATES and 1 other brand. A representative part number is AISIN WPH078.

Part numbers include JAPANESE OE FWH030, US MOTOR WORKS US8145 and BECK/ARNLEY 1312534, among others listed above.

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

2 Water Pump Gasket parts are listed for the 2021 Honda Accord, from FEL-PRO and MAHLE / CLEVITE.

Part numbers include FEL-PRO 36157 and MAHLE / CLEVITE K33409.