This page lists 21 cooling system parts for the 2025 Audi S6, across 8 part types, covering both the 2.9L V6 Turbocharged and the ELECTRIC. Every part shows its brand, manufacturer part number and fitment notes.
The cooling system system on the 2025 Audi S6 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 Water Pump (8 parts), Temperature Sender / Sensor (4 parts) and Radiator (3 parts). The other 5 part types cover the remaining 6 parts.
The 2025 Audi S6 was sold with both the 2.9L V6 Turbocharged and the ELECTRIC. 1 part fits every engine; the other 20 are engine-specific. Each part shows which engine(s) it fits.
12 brands supply cooling system parts for the 2025 Audi S6, led by NISSENS (4 parts), MOTORAD (3 parts) and MAHLE / CLEVITE (2 parts), plus 9 more brands. Quality grades include Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2025 Audi S6. 2 parts have it, including GATES 41568E (Water Pump) and GATES 41592E (Water Pump). Each part number opens a page with every vehicle that part fits.
Coolant / Antifreeze
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: all 2025 S6 engines | 904683 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | HT-12 Pink1 Gallon | 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.
One part is listed for the 2025 Audi S6 — VALVOLINE 904683.
Coolant Reservoir Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Fits: 2.9L V6 Turbocharged | T111 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Standard | View on Amazon |
| MOTORAD Fits: ELECTRIC | T143 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Standard | View on Amazon |
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.
2 Coolant Reservoir Cap parts for the 2025 Audi S6 come from MOTORAD.
Part numbers include MOTORAD T111 and MOTORAD T143.
Radiator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MAHLE / CLEVITE Fits: 2.9L V6 Turbocharged | CIR24000P | 🇺🇸 US | CenterAuxiliary | View on Amazon |
| MAHLE / CLEVITE Fits: 2.9L V6 Turbocharged | CR960000S | 🇺🇸 US | Brazed cooling fins | View on Amazon |
| NISSENS Fits: 2.9L V6 Turbocharged | 606578 | 🇺🇸 US | 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.
3 Radiator parts are listed for the 2025 Audi S6, from MAHLE / CLEVITE and NISSENS.
This group includes MAHLE / CLEVITE CIR24000P, MAHLE / CLEVITE CR960000S and NISSENS 606578.
Radiator Insulator Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN Fits: 2.9L V6 Turbocharged | AVM0730 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Radiator Insulator sleeves.
This group shows a single part: REIN AVM0730.
Radiator Mount
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| REIN Fits: 2.9L V6 Turbocharged | AVM0729 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Upper | View on Amazon |
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.
This group shows a single part: REIN AVM0729.
Temperature Sender / Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Fits: 2.9L V6 Turbocharged | 2CTS0163 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Lower | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS Fits: 2.9L V6 Turbocharged | 207067 | 🇺🇸 US | Oval Connector, bolted connection | View on Amazon |
| VNE Fits: 2.9L V6 Turbocharged | 9408050 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Lower | View on Amazon |
| WELLS Fits: 2.9L V6 Turbocharged | 5S16784 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Lower | 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.
4 Temperature Sender / Sensor parts are listed for the 2025 Audi S6, from HOLSTEIN, NISSENS, VNE and 1 other brand.
In the Economy grade, HOLSTEIN supplies 1 part: the catalog's value-priced group. A representative part number is HOLSTEIN 2CTS0163.
The Standard Replacement section lists 3 options from NISSENS, VNE and WELLS — built to original-equipment specification. NISSENS 207067 is listed in this group.
Listed part numbers: HOLSTEIN 2CTS0163, NISSENS 207067 and VNE 9408050, plus the other parts above.
Thermostat
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Fits: 2.9L V6 Turbocharged | 1229221 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes Sensor and SealStandard | View on Amazon |
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.
This group shows a single part: MOTORAD 1229221.
Water Pump
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Fits: 2.9L V6 Turbocharged | 1312562 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | HVAC SystemAuxiliary | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Popular Fits: 2.9L V6 Turbocharged | 41568E | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Electric | View on Amazon |
| GATES Popular Fits: 2.9L V6 Turbocharged | 41592E | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Electric | View on Amazon |
| FOUR SEASONS Fits: 2.9L V6 Turbocharged | 89085 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AuxiliaryHeater Water Pump | View on Amazon |
| FOUR SEASONS Fits: 2.9L V6 Turbocharged | 89084 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Auxiliary | View on Amazon |
| NISSENS Fits: 2.9L V6 Turbocharged | 832121 | 🇺🇸 US | Engine CoolingAuxiliary | View on Amazon |
| NISSENS Fits: 2.9L V6 Turbocharged | 832172 | 🇺🇸 US | HVAC SystemAuxiliary | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.9L V6 Turbocharged | 358304701 | 🇺🇸 US | Engine CoolingAuxiliary | View on Amazon |
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.
8 Water Pump parts for the 2025 Audi S6 come from 5 brands — GATES, FOUR SEASONS, NISSENS and 2 other brands. The "Popular" part is GATES 41568E.
The Economy section: 1 option from BECK/ARNLEY. BECK/ARNLEY 1312562 is listed in this group.
Standard Replacement: 6 parts, from GATES, FOUR SEASONS and NISSENS. A representative part number is GATES 41568E.
1 further part sits outside the graded sections, with the same engine-level match.
Listed part numbers: GATES 41568E, BECK/ARNLEY 1312562 and GATES 41592E, plus the other parts above.
Buying Cooling System Parts for a 2025 Audi S6
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.
- Match the engine first. Some cooling system parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- 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: Water Pump and Temperature Sender / Sensor .
Frequently Asked Questions
How many cooling system parts fit the 2025 Audi S6?
Our catalog currently lists 21 cooling system parts for the 2025 Audi S6 across 8 subcategories and 12 brands, covering both the 2.9L V6 Turbocharged and the ELECTRIC. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 2025 Audi S6 engines?
Some do. 1 part fits every engine; the other 20 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of cooling system problems on a 2025 Audi S6?
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 2025 Audi S6 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 2025 Audi S6?
First match the engine — each row shows which engine(s) the part fits. 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 2025 Audi S6
Cooling System Parts for Other Audi S6 Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.