2025 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

5 Coolant / Antifreeze parts for the 2025 Audi Q3 come from 2 brands — PRESTONE and VALVOLINE. 1 part fits every engine; the other 4 are engine-specific.

The Economy section lists 1 option from VALVOLINE — the catalog's value-priced group. VALVOLINE 719009 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 Standard Replacement grade, VALVOLINE supplies 1 part: built to original-equipment specification. A representative part number is VALVOLINE 904683.

2 further parts sit outside the graded sections, with the same engine-level match.

Listed part numbers: VALVOLINE 719009, PRESTONE AFC12100 and VALVOLINE 904683, plus the other parts above.

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

3 Coolant Hose / Pipe parts for the 2025 Audi Q3 come from 2 brands — REIN and VAICO.

Listed part numbers: REIN CHP0663, REIN CHP0793 and VAICO V105893.

This table covers the Coolant Hose Connector flanges. Read more

This group shows a single part: REIN CHC1009.

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

One part is listed for the 2025 Audi Q3 — REIN EPT0142.

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 2025 Audi Q3, from CALORSTAT, MOTORAD and REIN.

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

This table covers the Intercooler Air Hose pipes. Read more

2 Intercooler Air Hose / Pipe parts for the 2025 Audi Q3 come from 2 brands — GATES and VAICO.

This group includes 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 2025 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

2 Radiator parts for the 2025 Audi Q3 come from 2 brands — NISSENS and TYC.

Listed part numbers: NISSENS 65302 and TYC 13529.

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 2025 Audi Q3 come from 6 brands — STANDARD MOTOR PRODUCTS, HOLSTEIN, ULTRA-POWER and 3 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS TS608T. 3 parts fit every engine; the other 4 are engine-specific.

The Economy section: 3 options from STANDARD MOTOR PRODUCTS, HOLSTEIN and ULTRA-POWER. STANDARD MOTOR PRODUCTS TS608T is listed in this group.

Standard Replacement: 4 parts, from STANDARD MOTOR PRODUCTS, HELLA, VNE and 1 other brand. A representative part number is STANDARD MOTOR PRODUCTS TS608.

Part numbers include STANDARD MOTOR PRODUCTS TS608T, HOLSTEIN 2CTS0490 and ULTRA-POWER 5S1608, among others listed above.

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

One part is listed for the 2025 Audi Q3 — BECK/ARNLEY 1430913.

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

3 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2025 Audi Q3 come from 2 brands — MAHLE / CLEVITE and ELRING.

Part numbers include ELRING 453710, MAHLE / CLEVITE 72622 and MAHLE / CLEVITE C33480.

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

One part is listed for the 2025 Audi Q3 — 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

8 Water Pump parts are listed for the 2025 Audi Q3, from FOUR SEASONS, US MOTOR WORKS, BECK/ARNLEY and 4 other brands. US MOTOR WORKS US8124 carries the "Popular" badge.

Economy: 3 parts, from US MOTOR WORKS, BECK/ARNLEY and FVP. A representative part number is US MOTOR WORKS US8124.

The Standard Replacement section: 3 options from GMB, FOUR SEASONS and SALERI. GMB 1803050 is listed in this group.

2 ungrouped parts are not assigned to a grade, with the same engine-level match.

Part numbers include US MOTOR WORKS US8124 and BECK/ARNLEY 1312517, among others listed above.