2021 Audi Q3 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 2021 Audi Q3 come from 6 brands — PRESTONE, PEAK, PENTOSIN and 3 other brands. The "Popular" part is FVP MV5050GAL. 15 parts fit every engine; the other 2 are engine-specific.

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, VALVOLINE 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, PENTOSIN, AISIN, PEAK and 1 other brand supply 6 parts: built to original-equipment specification. A representative part number is AISIN ACE010.

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

3 Coolant Hose / Pipe parts for the 2021 Audi Q3 come from 2 brands — REIN and VAICO.

Part numbers include REIN CHP0663, REIN CHP0793 and VAICO V105893.

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

2 Coolant Hose / Pipe Seal parts are listed for the 2021 Audi Q3, from DORMAN and MAHLE / CLEVITE. 1 part fits every engine; the other 1 is engine-specific.

Part numbers include DORMAN 47451 and MAHLE / CLEVITE C32354.

This table covers the Coolant Hose Connector flanges. Read more

8 Coolant Hose Connector / Flange parts for the 2021 Audi Q3 come from 2 brands — VAICO and REIN. The "Popular" part is VAICO V105890.

Listed part numbers: VAICO V105890, VAICO V107695 and REIN CHC1009, plus the other parts above.

This table covers the Coolant Hose Flange plugs. Typical signs include a leak at the drain or glow-plug hole, or a plug that has rounded off. Replace the crush washer and torque to the spec in the notes. Read more

This group shows a single part: ÜRO PARTS 357121140.

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

6 Coolant Reservoir parts are listed for the 2021 Audi Q3, from TECHPRO, REIN, ÜRO PARTS and 2 other brands. REIN EPT0142 carries the "Popular" badge. 3 parts fit every engine; the other 3 are engine-specific.

This group includes REIN EPT0142, ÜRO PARTS 5Q0121407T and HELLA 366365551 and the remaining 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

3 Coolant Reservoir Cap parts are listed for the 2021 Audi Q3, from CALORSTAT, MOTORAD and REIN.

Listed part numbers: CALORSTAT RC0162, MOTORAD T93 and REIN CPE0039.

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

6 Intercooler parts for the 2021 Audi Q3 come from 6 brands — TYC, DORMAN, GPD and 3 other brands. The "Popular" part is TYC 18112. 1 part fits every engine; the other 5 are engine-specific.

Part numbers include TYC 18112, DORMAN 918990 and GPD 2711409, among others listed above.

This table covers the Intercooler Air Hose pipes. Read more

2 Intercooler Air Hose / Pipe parts for the 2021 Audi Q3 come from 2 brands — GATES and VAICO.

Part numbers include GATES 26576 and VAICO V10000137.

This table covers the Intercooler mounts. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes. Read more

One part is listed for the 2021 Audi Q3 — REIN AVM0728.

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 Audi Q3 come from 7 brands — VEMO, CSF, TYC and 4 other brands. The "Popular" part is CSF 3922.

The Economy section: 1 option from VEMO. VEMO V10600053 is listed in this group.

Standard Replacement: 5 parts, from CSF, TYC, DENSO and 2 other brands. A representative part number is CSF 3922.

1 further part sits outside the graded sections, with the same engine-level match.

Part numbers include CSF 3922, VEMO V10600053 and TYC 13529, among others listed 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 Audi Q3, from GPD, TECHPRO, TYC and 2 other brands. TYC 625320 carries the "Popular" badge. 3 parts fit every engine; the other 2 are engine-specific.

Economy: 2 parts, from GPD and TECHPRO. A representative part number is GPD 2812297.

The Standard Replacement section: 3 options from TYC, FOUR SEASONS and NISSENS. TYC 625320 is listed in this group.

This group includes TYC 625320, GPD 2812297 and TECHPRO VW3115125 and the remaining parts above.

This table covers the Radiator mounts. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes. Read more

VNE supplies both parts for the 2021 Audi Q3.

This group includes VNE 41000012 and VNE 41000038.

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 2021 Audi Q3 come from 10 brands — STANDARD MOTOR PRODUCTS, GPD, HOLSTEIN and 7 other brands. The "Popular" part is HOLSTEIN 2CTS0490. 3 parts fit every engine; the other 9 are engine-specific.

The Economy section: 6 options from GPD, HOLSTEIN, STANDARD MOTOR PRODUCTS and 2 other brands. HOLSTEIN 2CTS0490 is listed in this group.

Standard Replacement: 6 parts, from STANDARD MOTOR PRODUCTS, DELPHI, HELLA and 3 other brands. A representative part number is STANDARD MOTOR PRODUCTS TS608.

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 2021 Audi Q3, from BECK/ARNLEY, GATES, INA and 1 other brand. 1 part fits every engine; the other 3 are engine-specific.

Part numbers include BECK/ARNLEY 1430913, GATES 364320 and INA XW0360, 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

4 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2021 Audi Q3 come from 2 brands — ELRING and MAHLE / CLEVITE.

This group includes ELRING 938850, ELRING 453710 and MAHLE / CLEVITE 72622 and the remaining parts above.

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

3 Thermostat Housing / Water Outlet parts are listed for the 2021 Audi Q3, from MOTORAD and GATES.

This group includes GATES CO34954, MOTORAD CH2074 and MOTORAD CH3116.

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

14 Water Pump parts are listed for the 2021 Audi Q3, from FOUR SEASONS, PIERBURG, SALERI and 8 other brands. US MOTOR WORKS US8124 carries the "Popular" badge. 2 parts fit every engine; the other 12 are engine-specific.

Economy: 5 parts, from US MOTOR WORKS, BECK/ARNLEY, FVP and 2 other brands. A representative part number is US MOTOR WORKS US8124.

The Standard Replacement section: 8 options from FOUR SEASONS, PIERBURG, SALERI and 2 other brands. FOUR SEASONS 89108 is listed in this group.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

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 Audi Q3 come from ELRING.

Part numbers include ELRING 249150 and ELRING 323380.