18 Cooling system parts are listed for the 2021 Audi RS Q3, in 4 part types, covering the 2.5L L5 Turbocharged engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
The cooling system system on the 2021 Audi RS Q3 keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. The largest groups are Coolant / Antifreeze (14 parts), Coolant Hose Connector / Flange Seal (2 parts) and Radiator (1 part). The other 1 part type covers the remaining 1 part.
The 2021 Audi RS Q3 came with a single engine, the 2.5L L5 Turbocharged, and every part is verified against it.
8 brands supply cooling system parts for the 2021 Audi RS Q3, led by PRESTONE (5 parts), PEAK (4 parts) and PENTOSIN (3 parts), plus 5 more brands. Quality grades include Standard Replacement, Premium and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Audi RS Q3. 3 parts have it, including PRESTONE AF3100 (Coolant / Antifreeze) and VALVOLINE 719009 (Coolant / Antifreeze). Each part number opens a page with every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AF3055 | 🇲🇽 MX | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF3100 | 🇲🇽 MX | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| VALVOLINE Popular | 719009 | 🇲🇽 MX | Multi-Vehicle Yellow1 Gallon | View on Amazon |
| PEAK | BQA1GAL | 🇲🇽 MX | Blue Mountain Long LifeAll Vehicle | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AFC12100 | 🇲🇽 MX | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF2100 | 🇲🇽 MX | All Vehicles10yr/300k mi | View on Amazon |
| PEAK | PKP1GAL | 🇲🇽 MX | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK | PXA1GAL | 🇲🇽 MX | 1 GallonGlobal Lifetime | View on Amazon |
| PRESTONE | AFMAX | 🇲🇽 MX | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AISIN | ACE010 | 🇲🇽 MX | VioletSi-OAT | View on Amazon |
| PEAK | PEV1GAL | 🇲🇽 MX | OET European Extended Life Violet1 Gallon | View on Amazon |
| PENTOSIN | 8114306 | 🇲🇽 MX | Pentofrost E1 Gallon | View on Amazon |
| PENTOSIN | 8113106 | 🇲🇽 MX | Pentofrost E1.5 Liters | View on Amazon |
| PENTOSIN | 8113206 | 🇲🇽 MX | Pentofrost E5 Liters | View on Amazon |
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.
14 Coolant / Antifreeze parts are listed for the 2021 Audi RS Q3, from PRESTONE, PEAK, PENTOSIN and 2 other brands. PRESTONE AF3100 carries the "Popular" badge.
The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.
In the Economy grade, PRESTONE, VALVOLINE and PEAK supply 3 parts: the catalog's value-priced group. A representative part number is PRESTONE AF3100.
The Heavy Duty section lists 1 option from PRESTONE — rated for severe service. PRESTONE AFC12100 is listed in this group.
The Premium section lists 4 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.
The Standard Replacement section lists 5 options from PENTOSIN, AISIN and PEAK — built to original-equipment specification. AISIN ACE010 is listed in this group.
Coolant Hose Connector / Flange Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING | 223690 | 🇲🇽 MX | Cylinder HeadBody code: F3 | View on Amazon |
| ELRING | B37270 | 🇲🇽 MX | Body code: F3Inlet Flange Seal | View on Amazon |
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.
2 Coolant Hose Connector / Flange Seal parts for the 2021 Audi RS Q3 come from ELRING.
This group includes ELRING 223690 and ELRING B37270.
Radiator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS | 65302 | 🇲🇽 MX | Brazed cooling fins | View on Amazon |
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.
One part is listed for the 2021 Audi RS Q3 — NISSENS 65302.
Temperature Sender / Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD | 1712644 | 🇲🇽 MX | Oval Connectorwith 2 Terminal(s) | View on Amazon |
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.
One part is listed for the 2021 Audi RS Q3 — GPD 1712644.
Buying Cooling System Parts for a 2021 Audi RS Q3
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 2.5L L5 Turbocharged 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 Coolant Hose Connector / Flange Seal .
Frequently Asked Questions
How many cooling system parts fit the 2021 Audi RS Q3?
Our catalog currently lists 18 cooling system parts for the 2021 Audi RS Q3 across 4 subcategories and 8 brands, covering the 2.5L L5 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 2021 Audi RS Q3?
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 2021 Audi RS Q3 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 2021 Audi RS Q3?
Every part on this page is matched to the 2.5L L5 Turbocharged 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 2021 Audi RS Q3
Cooling System Parts for Other Audi RS Q3 Years
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