2023 Audi A6 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

12 Coolant / Antifreeze parts are listed for the 2023 Audi A6, from PRESTONE, PEAK, VALVOLINE and 1 other brand. PRESTONE AF3100 carries the "Popular" badge. 11 parts fit every engine; the other 1 is engine-specific.

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 Premium section lists 5 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 3 options from AISIN, PEAK and VALVOLINE — built to original-equipment specification. AISIN ACE010 is listed in this group.

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

One part is listed for the 2023 Audi A6 — REIN CHP0663.

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 for the 2023 Audi A6 come from 2 brands — FEL-PRO and MAHLE / CLEVITE.

Listed part numbers: FEL-PRO 36130 and MAHLE / CLEVITE C32354.

This table covers the Coolant Hose Connector flanges. Read more

One part is listed for the 2023 Audi A6 — VAICO V105890.

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 for the 2023 Audi A6 come from 3 brands — CALORSTAT, MOTORAD and ÜRO PARTS. 2 parts fit every engine; the other 1 is engine-specific.

Part numbers include CALORSTAT RC0162, MOTORAD T111 and ÜRO PARTS 4M0121321Q.

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

5 Intercooler parts are listed for the 2023 Audi A6, from NISSENS, GPD, HELLA and 1 other brand.

Listed part numbers: GPD 2711413, HELLA 366340871 and NISSENS 961466, plus the other parts above.

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 are listed for the 2023 Audi A6, from NISSENS, TYC, GPD and 5 other brands. NISSENS 606578 carries the "Popular" badge. 1 part fits every engine; the other 9 are engine-specific.

Economy: 3 parts, from GPD, TECHPRO and VEMO. A representative part number is GPD 13773C.

The Standard Replacement section: 7 options from NISSENS, TYC, AGILITY and 2 other brands. NISSENS 606578 is listed in this group.

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

4 Radiator Fan Assembly parts for the 2023 Audi A6 come from 3 brands — TECHPRO, GPD and UAC.

The Economy section: 3 options from TECHPRO and GPD. GPD 2812266 is listed in this group.

Standard Replacement: 1 part, from UAC. A representative part number is UAC FA50946C.

Part numbers include GPD 2812266, TECHPRO AU3115117 and TECHPRO AU3115124, among others listed above.

This table covers the shrouds that duct air through the fan and radiator. Read more

One part is listed for the 2023 Audi A6 — SKP SK621318.

This table covers the Radiator Insulator sleeves. Read more

This group shows a single part: REIN AVM0730.

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

This group shows a single part: REIN AVM0729.

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

5 Temperature Sender / Sensor parts are listed for the 2023 Audi A6, from GPD, HOLSTEIN, STANDARD MOTOR PRODUCTS and 2 other brands. STANDARD MOTOR PRODUCTS TX275 carries the "Popular" badge.

Economy: 2 parts, from GPD and HOLSTEIN. A representative part number is GPD 1814521.

The Standard Replacement section: 3 options from STANDARD MOTOR PRODUCTS, VNE and WALKER PRODUCTS. STANDARD MOTOR PRODUCTS TX275 is listed in this group.

Listed part numbers: STANDARD MOTOR PRODUCTS TX275, GPD 1814521 and HOLSTEIN 2CTS0163, plus the other parts 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

2 Thermostat parts for the 2023 Audi A6 come from 2 brands — CALORSTAT and MOTORAD.

This group includes CALORSTAT TE7367103J and MOTORAD 1229221.

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

13 Water Pump parts for the 2023 Audi A6 come from 7 brands — FOUR SEASONS, NISSENS, BECK/ARNLEY and 4 other brands. The "Popular" part is BECK/ARNLEY 1312513.

The Economy section: 3 options from BECK/ARNLEY and VAICO. BECK/ARNLEY 1312513 is listed in this group.

Standard Replacement: 9 parts, from FOUR SEASONS, NISSENS, GATES and 1 other brand. A representative part number is GATES 41568E.

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