2005 Acura RSX Cooling System Parts

Engine:
2.0L L4

The 2005 Acura RSX has 65 cooling system parts with verified fitment on this page — 12 part types and 31 brands, covering the 2.0L L4 engine. Each part includes a manufacturer part number and application notes.

On the 2005 Acura RSX, 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. 37 parts of the 65 listed are Coolant / Antifreeze (16 parts), Radiator (13 parts) and Radiator Fan Assembly (8 parts). The other 9 part types cover the remaining 28 parts.

Coolant / Antifreeze

Compatible With All Colors

Brand Part Number Markets Notes Buy
PRESTONE AF3055
🇺🇸 US 🇨🇦 CA
Prime YellowAll Vehicles
Fitment notes — PRESTONE AF3055
Prime YellowAll VehiclesExtended Life55 GAL DrumConcentratePrime® Extended Life All Makes All Models
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Economy

Brand Part Number Markets Notes Buy
FVP Popular MV5050GAL
🇺🇸 US 🇨🇦 CA
Extended LifeAll Makes / All Models
Fitment notes — FVP MV5050GAL
Extended LifeAll Makes / All Models1 Gallon
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PRESTONE Popular AF3100
🇺🇸 US 🇨🇦 CA
Prime Yellow - All VehiclesExtended Life
Fitment notes — PRESTONE AF3100
Prime Yellow - All VehiclesExtended Life1 Gallon
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PEAK BQA1GAL
🇺🇸 US 🇨🇦 CA
Blue Mountain Long LifeAll Vehicle
Fitment notes — PEAK BQA1GAL
Blue Mountain Long LifeAll Vehicle1 Gallon
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VALVOLINE 719009
🇺🇸 US 🇨🇦 CA
Multi-Vehicle Yellow1 Gallon
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Premium

Brand Part Number Markets Notes Buy
PRESTONE Popular AF2100
🇺🇸 US 🇨🇦 CA
All Vehicles10yr/300k mi
Fitment notes — PRESTONE AF2100
All Vehicles10yr/300k mi1 GallonExtended Life
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PEAK PKP1GAL
🇺🇸 US 🇨🇦 CA
All Vehicles Antifreeze1 Gallon
Fitment notes — PEAK PKP1GAL
All Vehicles Antifreeze1 GallonPREMIUM1 GALLON10X MORE SCALE FIGHTING INHIBITORS10 YEAR/300K MILES
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PEAK PXA1GAL
🇺🇸 US 🇨🇦 CA
1 GallonGlobal Lifetime
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PRESTONE AF6310
🇺🇸 US 🇨🇦 CA
MAX Original EquipmentAsian Blue
Fitment notes — PRESTONE AF6310
MAX Original EquipmentAsian Blue1 Gallon
(Type: Prediluted)
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PRESTONE AFMAX
🇺🇸 US 🇨🇦 CA
Max Universal1 Gallon
Fitment notes — PRESTONE AFMAX
Max Universal1 Gallon15 Year/350k Miles
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Standard Replacement

Brand Part Number Markets Notes Buy
VALVOLINE Popular 861398
🇺🇸 US 🇨🇦 CA
Asian Vehicle Blue1 Gallon
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AISIN ACB003
🇺🇸 US 🇨🇦 CA
BlueHOAT
Fitment notes — AISIN ACB003
BlueHOAT
(Type: Prediluted)
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BECK/ARNLEY 2521501
🇺🇸 US 🇨🇦 CA
Premium Extra Life BlueAsian
Fitment notes — BECK/ARNLEY 2521501
Premium Extra Life BlueAsianPOAT
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BECK/ARNLEY 2521001
🇺🇸 US 🇨🇦 CA
Premium Green1 Gallon
Fitment notes — BECK/ARNLEY 2521001
Premium Green1 GallonPOAT
252-1501 Blue premix Can be used with or In place of Green
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PEAK PAB1GAL
🇺🇸 US 🇨🇦 CA
OET Asian Extended Life Blue1 Gallon
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PENTOSIN 8115207
🇺🇸 US 🇨🇦 CA
Pentofrost A31 Gallon
Fitment notes — PENTOSIN 8115207
Pentofrost A31 GallonBluePOAT
(Type: Prediluted)
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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.

Coolant Hose / Pipe Seal

Brand Part Number Markets Notes Buy
FEL-PRO 36022
🇺🇸 US 🇨🇦 CA
O-Ring
Fitment notes — FEL-PRO 36022
O-Ring
COOLANT PIPE
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MAHLE / CLEVITE C32045
🇺🇸 US 🇨🇦 CA
Engine Coolant Outlet O-Ring
Fitment notes — MAHLE / CLEVITE C32045
Engine Coolant Outlet O-Ring
RubberCoolant Pipe
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VICTOR REINZ 417634500
🇺🇸 US 🇨🇦 CA
O-Ring
Fitment notes — VICTOR REINZ 417634500
O-Ring
COOLANT PIPE
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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.

Coolant Hose Connector / Flange Seal

Brand Part Number Markets Notes Buy
ELRING 927280
🇺🇸 US 🇨🇦 CA
Cylinder HeadBase Model
Fitment notes — ELRING 927280
Cylinder HeadBase ModelInlet Flange Seal
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This table covers the seals at the Coolant Hose Connector / Flange. 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.

Coolant Reservoir

Brand Part Number Markets Notes Buy
DORMAN 603243
🇺🇸 US 🇨🇦 CA
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GPD 2411303
🇺🇸 US 🇨🇦 CA
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TECHPRO AC3014100
🇺🇸 US 🇨🇦 CA
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This table covers the overflow / expansion tanks that hold extra coolant.

Coolant Reservoir Cap

Brand Part Number Markets Notes Buy
CALORSTAT RC0207
🇺🇸 US 🇨🇦 CA
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DORMAN 54227
🇺🇸 US 🇨🇦 CA
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MOTORAD T165
🇺🇸 US 🇨🇦 CA
Standard
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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.

Cooling Fan Control Module

Brand Part Number Markets Notes Buy
US MOTOR WORKS 16749
🇺🇸 US 🇨🇦 CA
Econo Control
Fitment notes — US MOTOR WORKS 16749
Econo Control
Requires 16763 Single Relay Harness
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US MOTOR WORKS 16789
🇺🇸 US 🇨🇦 CA
Better Control
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US MOTOR WORKS 16795
🇺🇸 US 🇨🇦 CA
Best Control
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This table covers the Cooling Fan control modules.

Cooling System Tester Adapter

Brand Part Number Markets Notes Buy
GATES 31409
🇺🇸 US 🇨🇦 CA
Cooling System Pressure
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MOTORAD 3124
🇺🇸 US 🇨🇦 CA
StandardRadiator Cap Adapter
Fitment notes — MOTORAD 3124
StandardRadiator Cap Adapter
Cooling System PressureRadiator Cap Adapter
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MOTORAD 3125
🇺🇸 US 🇨🇦 CA
Standard
Fitment notes — MOTORAD 3125
Standard
Cooling System Pressure
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This table covers the adapters used to pressure-test this cooling system.

Radiator

Brand Part Number Markets Notes Buy
CSF Popular 2965
🇺🇸 US 🇨🇦 CA
1 RowPlastic Tank / Aluminum Core
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DENSO Popular 2219377
🇺🇸 US 🇨🇦 CA
Manual trans.
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KOYORAD Popular A2412
🇺🇸 US 🇨🇦 CA
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AGILITY 8012412
🇺🇸 US 🇨🇦 CA
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FVP RAD2412
🇺🇸 US 🇨🇦 CA
Automatic trans.
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FVP RAD2425
🇺🇸 US 🇨🇦 CA
Manual trans.
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NISSENS 606988
🇺🇸 US 🇨🇦 CA
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OSC 2425
🇺🇸 US 🇨🇦 CA
Manual trans.
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OSC 2412
🇺🇸 US 🇨🇦 CA
Automatic trans.
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SPECTRA PREMIUM CU2412
🇺🇸 US 🇨🇦 CA
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TYC 2412
🇺🇸 US 🇨🇦 CA
PrimaryAutomatic trans.
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UAC RA2412C
🇺🇸 US 🇨🇦 CA
Downflow
Fitment notes — UAC RA2412C
Downflow
5 speed Automatic trans.
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UAC RA2425C
🇺🇸 US 🇨🇦 CA
Downflow
Fitment notes — UAC RA2425C
Downflow
Fits:
5 speed Manual trans.or 6 speed Manual trans.
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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.

Radiator Cap

Locking Replacement

Brand Part Number Markets Notes Buy
MOTORAD ST37
🇺🇸 US 🇨🇦 CA
Safety LeverIndicator Markings Color: Silver
Fitment notes — MOTORAD ST37
Safety LeverIndicator Markings Color: Silver
Relief Pressure 16 lbs
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Standard Replacement

Brand Part Number Markets Notes Buy
CSF Popular 4514
🇺🇸 US 🇨🇦 CA
Micro, 16 psi
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GATES Popular 31412
🇺🇸 US 🇨🇦 CA
OE Type
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CALORSTAT RC0040
🇺🇸 US 🇨🇦 CA
Includes 2 sealsMetallic
Fitment notes — CALORSTAT RC0040
Includes 2 sealsMetallicDegassing function
PSI - 20.0
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MOTORAD T37
🇺🇸 US 🇨🇦 CA
StandardIncludes Hose
Fitment notes — MOTORAD T37
StandardIncludes HoseIndicator Markings Color: Red, White, Yellow
Relief Pressure 16 lbs
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SKP SK10242
🇺🇸 US 🇨🇦 CA
16 psi Pressure Rating
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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.

Radiator Drain Petcock

Brand Part Number Markets Notes Buy
DORMAN 490216
🇺🇸 US 🇨🇦 CA
PlasticScrew-In Type
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This table covers the petcocks used to drain the radiator.

Radiator Fan Assembly

Economy

Brand Part Number Markets Notes Buy
DORMAN Popular 621068
🇺🇸 US 🇨🇦 CA
Manual trans.
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GPD 2811297
🇺🇸 US 🇨🇦 CA
LeftRadiator Side
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Standard Replacement

Brand Part Number Markets Notes Buy
TYC Popular 600600
🇺🇸 US 🇨🇦 CA
LeftAutomatic trans.
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ACKOJA A26010006
🇺🇸 US 🇨🇦 CA
Manual trans.with OE No. 19020PNLG01
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AGILITY 6011111
🇺🇸 US 🇨🇦 CA
Fan Assembly
Fitment notes — AGILITY 6011111
Fan Assembly
Automatic trans.
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FOUR SEASONS 75387
🇺🇸 US 🇨🇦 CA
Automatic trans.
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FOUR SEASONS 76117
🇺🇸 US 🇨🇦 CA
Manual trans.
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UAC FA50005C
🇺🇸 US 🇨🇦 CA
Base Model
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This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator.

Radiator Fan Motor

Brand Part Number Markets Notes Buy
TYC Popular 630840
🇺🇸 US 🇨🇦 CA
LeftManual trans.
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FOUR SEASONS 75756
🇺🇸 US 🇨🇦 CA
Automatic trans.
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FOUR SEASONS 75750
🇺🇸 US 🇨🇦 CA
Manual trans.
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TYC 631000
🇺🇸 US 🇨🇦 CA
LeftAutomatic trans.
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VDO / CONTINENTAL PM3946
🇺🇸 US 🇨🇦 CA
Manual trans.
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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.

Buying Cooling System Parts for a 2005 Acura RSX

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 2.0L 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 Radiator .

Frequently Asked Questions

How many cooling system parts fit the 2005 Acura RSX?

Our catalog currently lists 65 cooling system parts for the 2005 Acura RSX across 12 subcategories and 31 brands, covering the 2.0L L4 engine. Each part is matched to the engine(s) it fits.

What are the signs of cooling system problems on a 2005 Acura RSX?

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 2005 Acura RSX 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 2005 Acura RSX?

Every part on this page is matched to the 2.0L 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 2005 Acura RSX

Cooling System Parts for Other Acura RSX Years

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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.