2018 Acura MDX 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

17 Coolant / Antifreeze parts for the 2018 Acura MDX come from 7 brands — PRESTONE, PEAK, VALVOLINE and 4 other brands. The "Popular" part is FVP MV5050GAL. Every part fits both the 3.0L V6 ELECTRIC/GAS and the 3.5L V6.

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 Heavy Duty grade, PRESTONE supplies 1 part: rated for severe service. A representative part number is PRESTONE AFC12100.

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 hard pipes and extra hoses in the coolant circuit. Read more

This group shows a single part: MOTORAD CH2165.

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 are listed for the 2018 Acura MDX, from AJUSA, FEL-PRO, MAHLE / CLEVITE and 1 other brand. 3 parts fit every engine; the other 1 is engine-specific.

Listed part numbers: AJUSA 16022450, FEL-PRO ES72774 and MAHLE / CLEVITE C32870, plus the other parts above.

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

One part is listed for the 2018 Acura MDX — TECHPRO AC3014115.

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

MOTORAD supplies both parts for the 2018 Acura MDX.

Listed part numbers: MOTORAD T128 and MOTORAD T107.

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

3 Cooling System Tester Adapter parts for the 2018 Acura MDX come from 2 brands — MOTORAD and GATES. 2 parts fit every engine; the other 1 is engine-specific.

This group includes GATES 31409, MOTORAD 3124 and MOTORAD 3125.

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

10 Radiator parts for the 2018 Acura MDX come from 10 brands — ULTRA-POWER, CSF, DENSO and 7 other brands. The "Popular" part is CSF 3644. 9 parts fit every engine; the other 1 is engine-specific.

The Economy section: 1 option from ULTRA-POWER. ULTRA-POWER 13402 is listed in this group.

Standard Replacement: 9 parts, from CSF, DENSO, FVP and 6 other brands. A representative part number is CSF 3644.

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

3 Radiator Cap parts for the 2018 Acura MDX come from 2 brands — MOTORAD and CALORSTAT.

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 CALORSTAT and MOTORAD. A representative part number is CALORSTAT RC0040.

Part numbers include MOTORAD ST37, CALORSTAT RC0040 and MOTORAD T37.

This table covers the petcocks used to drain the radiator. Read more

One part is listed for the 2018 Acura MDX — DORMAN 490216.

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

7 Radiator Fan Assembly parts are listed for the 2018 Acura MDX, from GPD, SKP, VARIOUS MFR and 3 other brands. SKP SK601490 carries the "Popular" badge.

Economy: 4 parts, from GPD, SKP and VARIOUS MFR. A representative part number is SKP SK601490.

The Standard Replacement section: 3 options from TYC, FOUR SEASONS and UAC. TYC 601490 is listed in this group.

This group includes SKP SK601490, GPD 2811922 and GPD 2812230 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

4 Radiator Hose parts are listed for the 2018 Acura MDX, from CONTINENTAL and DAYCO.

Listed part numbers: CONTINENTAL 66550, CONTINENTAL 61421 and DAYCO 72981, plus the other 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

12 Temperature Sender / Sensor parts for the 2018 Acura MDX come from 10 brands — STANDARD MOTOR PRODUCTS, NTK, CALORSTAT and 7 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS TX215T.

The Economy section: 5 options from STANDARD MOTOR PRODUCTS, CALORSTAT, GPD and 2 other brands. STANDARD MOTOR PRODUCTS TX215T is listed in this group.

Standard Replacement: 7 parts, from NTK, BECK/ARNLEY, WELLS and 3 other brands. A representative part number is BECK/ARNLEY 1581570.

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

4 Thermostat parts are listed for the 2018 Acura MDX, from BECK/ARNLEY, FOUR SEASONS, JAPANESE OE and 1 other brand.

Part numbers include BECK/ARNLEY 1430954, FOUR SEASONS 86239 and JAPANESE OE WHHNL78, among others listed 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

9 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2018 Acura MDX come from 4 brands — FEL-PRO, MAHLE / CLEVITE, APEX and 1 other brand. The "Popular" part is FEL-PRO 35741.

Part numbers include FEL-PRO 35741, FEL-PRO 35162 and APEX AWO2061, among others listed 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 are listed for the 2018 Acura MDX, from AISIN, BECK/ARNLEY, FVP and 5 other brands. AISIN WPH801 carries the "Popular" badge.

Economy: 3 parts, from BECK/ARNLEY, FVP and US MOTOR WORKS. A representative part number is BECK/ARNLEY 1312285.

The Standard Replacement section: 7 options from AISIN, GMB, ACDELCO and 2 other brands. AISIN WPH801 is listed in this group.

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 for the 2018 Acura MDX come from 3 brands — APEX, BECK/ARNLEY and FEL-PRO.

This group includes APEX AWP3161, BECK/ARNLEY 0394112 and FEL-PRO 35677.