The 2021 Honda City has 28 cooling system parts with verified fitment on this page — 8 part types and 12 brands, covering the 1.5L L4 engine. Each part includes a manufacturer part number and application notes.
The cooling system system on the 2021 Honda City keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. The largest groups are Coolant / Antifreeze (11 parts), Water Pump (5 parts) and Radiator Cap (3 parts). The other 5 part types cover the remaining 9 parts.
Every part on this page is matched to the 1.5L L4 — the only engine offered in the 2021 Honda City.
The most listed brands for 2021 Honda City cooling system parts are GATES (9 parts), PRESTONE (4 parts) and PEAK (4 parts), plus 9 more brands. Quality grades include Standard Replacement, Economy and Premium.
4 parts on this 2021 Honda City page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including PRESTONE AF3100 (Coolant / Antifreeze) and US MOTOR WORKS US6350 (Water Pump). Click any part number to see every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AF3055 | 🇲🇽 MX | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF3100 | 🇲🇽 MX | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK | BQA1GAL | 🇲🇽 MX | Blue Mountain Long LifeAll Vehicle | View on Amazon |
| VALVOLINE | 719009 | 🇲🇽 MX | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF2100 | 🇲🇽 MX | All Vehicles10yr/300k mi | View on Amazon |
| PEAK | PKP1GAL | 🇲🇽 MX | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK | PXA1GAL | 🇲🇽 MX | Global Lifetime1 Gallon | View on Amazon |
| PRESTONE | AFMAX | 🇲🇽 MX | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AISIN Popular | ACB003 | 🇲🇽 MX | BlueHOAT | View on Amazon |
| PEAK | PAB1GAL | 🇲🇽 MX | OET Asian Extended Life Blue1 Gallon | View on Amazon |
| PENTOSIN | 8115207 | 🇲🇽 MX | Pentofrost A31 Gallon | View on Amazon |
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.
11 Coolant / Antifreeze parts for the 2021 Honda City come from 5 brands — PRESTONE, PEAK, VALVOLINE and 2 other brands. The "Popular" part is PRESTONE AF3100.
In the Compatible With All Colors grade, PRESTONE supplies 1 part: grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. A representative part number is PRESTONE AF3055.
The Economy section lists 3 options from PRESTONE, PEAK and VALVOLINE — the catalog's value-priced group. PRESTONE AF3100 is listed in this group.
In the Premium grade, PRESTONE and PEAK supply 4 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.
In the Standard Replacement grade, AISIN, PEAK and PENTOSIN supply 3 parts: built to original-equipment specification. A representative part number is AISIN ACB003.
Cooling System Tester Adapter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES | 31409 | 🇲🇽 MX | Cooling System Pressure | View on Amazon |
This table covers the adapters used to pressure-test this cooling system.
This group shows a single part: GATES 31409.
Radiator Cap
Locking Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD | ST37 | 🇲🇽 MX | Safety LeverIndicator Markings Color: Silver | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES | 31412 | 🇲🇽 MX | OE Type | View on Amazon |
| MOTORAD | T37 | 🇲🇽 MX | StandardIncludes Hose | View on Amazon |
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.
3 Radiator Cap parts for the 2021 Honda City come from 2 brands — MOTORAD and GATES.
In the Locking Replacement grade, MOTORAD supplies 1 part: grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. A representative part number is MOTORAD ST37.
Standard Replacement: 2 parts, from GATES and MOTORAD. A representative part number is GATES 31412.
Listed part numbers: MOTORAD ST37, GATES 31412 and MOTORAD T37.
Radiator Hose
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 22934M | 🇺🇸 US 🇨🇦 CA | Professional / GoldMolded | View on Amazon |
| GATES | 24793 | 🇲🇽 MX | Molded | View on Amazon |
| GATES | 24792 | 🇲🇽 MX | Molded | View on Amazon |
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.
3 Radiator Hose parts are listed for the 2021 Honda City, from GATES and ACDELCO.
This group includes ACDELCO 22934M, GATES 24793 and GATES 24792.
Radiator Mount Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 927241 | 🇲🇽 MX | Fits Left Upper | View on Amazon |
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.
One part is listed for the 2021 Honda City — DORMAN 927241.
Thermostat
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES | 33340S | 🇲🇽 MX | Premium | View on Amazon |
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.
One part is listed for the 2021 Honda City — GATES 33340S.
Thermostat Housing / Water Outlet
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES | CO35002 | 🇲🇽 MX | Thermostat CoverWater Outlet | View on Amazon |
| GATES | CO35095 | 🇲🇽 MX | Water Outlet | View on Amazon |
| GATES | CO35083 | 🇲🇽 MX | Water Outlet | View on Amazon |
This table covers the housings and outlets the thermostat sits in.
GATES supplies the 3 Thermostat Housing / Water Outlet parts for the 2021 Honda City.
Part numbers include GATES CO35002, GATES CO35095 and GATES CO35083.
Water Pump
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| US MOTOR WORKS Popular | US6350 | 🇲🇽 MX | View on Amazon | |
| FVP | US6350 | 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | 1353050 | 🇲🇽 MX | View on Amazon | |
| GATES | 42121 | 🇲🇽 MX | View on Amazon | |
| GMB | 1353050 | 🇲🇽 MX | View on Amazon |
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.
5 Water Pump parts are listed for the 2021 Honda City, from FVP, US MOTOR WORKS, GATES and 1 other brand. US MOTOR WORKS US6350 carries the "Popular" badge.
Economy: 2 parts, from US MOTOR WORKS and FVP. A representative part number is US MOTOR WORKS US6350.
The Standard Replacement section: 3 options from FVP, GATES and GMB. FVP 1353050 is listed in this group.
Listed part numbers: US MOTOR WORKS US6350 and FVP 1353050, plus the other parts above.
Buying Cooling System Parts for a 2021 Honda City
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Confirm you have the 1.5L L4 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Coolant / Antifreeze and Water Pump .
Frequently Asked Questions
How many cooling system parts fit the 2021 Honda City?
Our catalog currently lists 28 cooling system parts for the 2021 Honda City across 8 subcategories and 12 brands, covering the 1.5L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 2021 Honda City?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Honda City was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2021 Honda City?
Every part on this page is matched to the 1.5L L4 engine. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Honda City
Cooling System Parts for Other Honda City Years
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