2021 Acura Ilx 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 for the 2021 Acura Ilx come from 7 brands — PRESTONE, PEAK, VALVOLINE and 4 other brands. The "Popular" part is FVP MV5050GAL.

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 4 options from FVP, PRESTONE, PEAK and 1 other brand — the catalog's value-priced group. FVP MV5050GAL is listed in this group.

In the Premium grade, PRESTONE and PEAK supply 5 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.

In the Standard Replacement grade, BECK/ARNLEY, VALVOLINE, AISIN and 2 other brands supply 6 parts: built to original-equipment specification. A representative part number is VALVOLINE 861398.

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

3 Coolant Reservoir parts are listed for the 2021 Acura Ilx, from GPD, TECHPRO and VARIOUS MFR.

Listed part numbers: GPD 2411252 and TECHPRO HO3014131, plus the other parts above.

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

One part is listed for the 2021 Acura Ilx — MOTORAD T150.

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

7 Radiator parts for the 2021 Acura Ilx come from 7 brands — GPD, TECHPRO, DENSO and 4 other brands. The "Popular" part is DENSO 2219438.

The Economy section: 2 options from GPD and TECHPRO. GPD 13537C is listed in this group.

Standard Replacement: 5 parts, from DENSO, SPECTRA PREMIUM, AGILITY and 2 other brands. A representative part number is DENSO 2219438.

This group includes DENSO 2219438, GPD 13537C and TECHPRO AC3010156 and the remaining parts 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 for the 2021 Acura Ilx come from 4 brands — MOTORAD, GATES, CALORSTAT and 1 other brand. The "Popular" part is GATES 31412.

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: 4 parts, from GATES, CALORSTAT, MOTORAD and 1 other brand. A representative part number is GATES 31412.

This group includes GATES 31412, MOTORAD ST37 and CALORSTAT RC0040 and the remaining 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 are listed for the 2021 Acura Ilx, from DORMAN, GPD, TYC and 2 other brands. DORMAN 621567 carries the "Popular" badge.

Economy: 2 parts, from DORMAN and GPD. A representative part number is DORMAN 621567.

The Standard Replacement section: 3 options from TYC, UAC and VDO / CONTINENTAL. TYC 601670 is listed in this group.

This group includes DORMAN 621567, GPD 2811736 and TYC 601670 and the remaining 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

One part is listed for the 2021 Acura Ilx — GATES 24907.

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

7 Temperature Sender / Sensor parts for the 2021 Acura Ilx come from 7 brands — CALORSTAT, GPD, HOLSTEIN and 4 other brands. The "Popular" part is WALKER PRODUCTS 2111080.

The Economy section: 3 options from CALORSTAT, GPD and HOLSTEIN. CALORSTAT WS3039 is listed in this group.

Standard Replacement: 4 parts, from WALKER PRODUCTS, WELLS, BECK/ARNLEY and 1 other brand. A representative part number is WALKER PRODUCTS 2111080.

Listed part numbers: WALKER PRODUCTS 2111080, CALORSTAT WS3039 and GPD 1712488, plus the other parts above.

This table covers the Temperature Sender / Sensor O-rings. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove. Read more

This group shows a single part: FEL-PRO 72926.

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 are listed for the 2021 Acura Ilx, from DORMAN, SKP, AISIN and 5 other brands. DORMAN 902788 carries the "Popular" badge.

Economy: 2 parts, from DORMAN and SKP. A representative part number is DORMAN 902788.

The Standard Replacement section: 6 options from AISIN, BECK/ARNLEY, CALORSTAT and 3 other brands. AISIN THH011 is listed in this group.

Listed part numbers: DORMAN 902788, SKP SK902788 and AISIN THH011, 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

6 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2021 Acura Ilx come from 5 brands — FEL-PRO, MAHLE / CLEVITE, AJUSA and 2 other brands. The "Popular" part is FEL-PRO 35741.

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

One part is listed for the 2021 Acura Ilx — MOTORAD CH3173.

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 are listed for the 2021 Acura Ilx, from US MOTOR WORKS, BECK/ARNLEY, FVP and 5 other brands. US MOTOR WORKS US8103 carries the "Popular" badge.

Economy: 4 parts, from US MOTOR WORKS, BECK/ARNLEY, FVP and 1 other brand. A representative part number is US MOTOR WORKS US8103.

The Standard Replacement section: 4 options from AISIN, DAYCO, GATES and 1 other brand. AISIN WPH067 is listed in this group.

This group includes US MOTOR WORKS US8103 and BECK/ARNLEY 1312532 and the remaining parts 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 for the 2021 Acura Ilx come from 2 brands — APEX and ELRING.

Part numbers include APEX AWP3318 and ELRING 108460.

This table covers the Water Pump Seal O-rings. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove. Read more

2 Water Pump Seal / O-Ring parts are listed for the 2021 Acura Ilx, from ELRING and FEL-PRO.

Listed part numbers: ELRING 634850 and FEL-PRO 36146.