2018 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

16 Coolant / Antifreeze parts are listed for the 2018 Audi A6, from PRESTONE, PEAK, PENTOSIN and 3 other brands. FVP MV5050GAL carries the "Popular" badge. 12 parts fit every engine; the other 4 are 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, FVP, PRESTONE, VALVOLINE and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.

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 6 options from PENTOSIN, AISIN, PEAK and 1 other brand — 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

6 Coolant Hose / Pipe parts are listed for the 2018 Audi A6, from REIN, MOTORAD and VAICO.

Part numbers include MOTORAD CH3075, REIN CHP0663 and REIN CHE0958, among others listed above.

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

7 Coolant Hose / Pipe Seal parts for the 2018 Audi A6 come from 4 brands — MAHLE / CLEVITE, AJUSA, DORMAN and 1 other brand. The "Popular" part is MAHLE / CLEVITE C32208. 1 part fits every engine; the other 6 are engine-specific.

This group includes MAHLE / CLEVITE C32208, AJUSA 16098500 and AJUSA 16020200 and the remaining parts above.

This table covers the Coolant Hose Connector flanges. Read more

7 Coolant Hose Connector / Flange parts are listed for the 2018 Audi A6, from REIN, VAICO, DORMAN and 2 other brands. DORMAN 627006 carries the "Popular" badge.

Economy: 2 parts, from DORMAN and SKP. A representative part number is DORMAN 627006.

The Standard Replacement section: 4 options from REIN, MOTORAD and VAICO. MOTORAD CH8016 is listed in this group.

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

Part numbers include DORMAN 627006, SKP SK627006 and MOTORAD CH8016, among others listed 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

One part is listed for the 2018 Audi A6 — ÜRO PARTS 357121140.

This table covers the Coolant Hose retainers and clips. Read more

One part is listed for the 2018 Audi A6 — BECK/ARNLEY 1470039.

This table covers the Coolant Pipe adapters. Read more

This group shows a single part: ÜRO PARTS 06K121143PRM.

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

5 Coolant Reservoir parts for the 2018 Audi A6 come from 4 brands — REIN, GPD, MAHLE / CLEVITE and 1 other brand. The "Popular" part is REIN EPK0191.

This group includes REIN EPK0191, GPD 2411310 and MAHLE / CLEVITE CRT60000S 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

4 Coolant Reservoir Cap parts for the 2018 Audi A6 come from 4 brands — CALORSTAT, GATES, MOTORAD and 1 other brand.

Listed part numbers: CALORSTAT RC0011, GATES 31529 and MOTORAD T49, plus the other parts above.

This table covers the Cooling Fan control modules. Read more

3 Cooling Fan Control Module parts for the 2018 Audi A6 come from 3 brands — STANDARD MOTOR PRODUCTS, ULTRA-POWER and ÜRO PARTS.

This group includes STANDARD MOTOR PRODUCTS RY1904 and ÜRO PARTS 8K0959501G and the remaining parts above.

This table covers the adapters used to pressure-test this cooling system. Read more

MOTORAD supplies both parts for the 2018 Audi A6.

Listed part numbers: MOTORAD 3036 and MOTORAD 3037.

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

7 Intercooler parts are listed for the 2018 Audi A6, from CSF, NISSENS, AGILITY and 4 other brands. CSF 6052 carries the "Popular" badge.

Listed part numbers: CSF 6052, NISSENS 96618 and AGILITY 5010024, 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

21 Radiator parts are listed for the 2018 Audi A6, from NISSENS, MAHLE / CLEVITE, GPD and 6 other brands. KOYORAD A13276 carries the "Popular" badge.

Economy: 3 parts, from GPD. A representative part number is GPD 13188C.

The Standard Replacement section: 17 options from NISSENS, MAHLE / CLEVITE, OSC and 5 other brands. KOYORAD A13276 is listed in this group.

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

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

11 Radiator Fan Assembly parts for the 2018 Audi A6 come from 6 brands — MAHLE / CLEVITE, TYC, NISSENS and 3 other brands. The "Popular" part is TYC 625590.

The Economy section: 2 options from GPD and TECHPRO. GPD 2812468 is listed in this group.

Standard Replacement: 3 parts, from MAHLE / CLEVITE and TYC. A representative part number is TYC 625590.

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

This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

This group shows a single part: ÜRO PARTS 06L121081K.

This table covers the Radiator insulators. Read more

3 Radiator Insulator parts for the 2018 Audi A6 come from VNE.

This group includes VNE 41000034, VNE 41000036 and VNE 41000078.

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

2 Radiator Mount parts for the 2018 Audi A6 come from REIN.

This group includes REIN AVM0702 and REIN AVM0742.

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

19 Temperature Sender / Sensor parts are listed for the 2018 Audi A6, from STANDARD MOTOR PRODUCTS, HOLSTEIN, BECK/ARNLEY and 10 other brands. HOLSTEIN 2CTS0490 carries the "Popular" badge. 6 parts fit every engine; the other 13 are engine-specific.

Economy: 6 parts, from HOLSTEIN, STANDARD MOTOR PRODUCTS, GPD and 2 other brands. A representative part number is HOLSTEIN 2CTS0490.

The Standard Replacement section: 13 options from BECK/ARNLEY, STANDARD MOTOR PRODUCTS, VNE and 6 other brands. BECK/ARNLEY 1580784 is listed in this group.

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

9 Thermostat parts for the 2018 Audi A6 come from 8 brands — MOTORAD, SKP, ÜRO PARTS and 5 other brands. The "Popular" part is MOTORAD 963189.

The Economy section: 2 options from SKP and ÜRO PARTS. SKP SK121111 is listed in this group.

Standard Replacement: 6 parts, from MOTORAD, BECK/ARNLEY, FOUR SEASONS and 2 other brands. A representative part number is MOTORAD 963189.

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

Part numbers include MOTORAD 963189, SKP SK121111 and ÜRO PARTS 06E121111AT, 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

8 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2018 Audi A6, from FEL-PRO, MAHLE / CLEVITE, FACET and 2 other brands. FEL-PRO 35924 carries the "Popular" badge. 1 part fits every engine; the other 7 are engine-specific.

Listed part numbers: FEL-PRO 35924, MAHLE / CLEVITE 72622 and AJUSA 16502300, plus the other parts above.

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

2 Thermostat Housing / Water Outlet parts for the 2018 Audi A6 come from 2 brands — REIN and VEMO.

Part numbers include REIN CHP1021 and VEMO V10990023.

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

15 Water Pump parts for the 2018 Audi A6 come from 9 brands — PIERBURG, FOUR SEASONS, NISSENS and 6 other brands. The "Popular" part is SKP SK6033150.

The Economy section: 4 options from SKP, US MOTOR WORKS, BECK/ARNLEY and 1 other brand. SKP SK6033150 is listed in this group.

Standard Replacement: 11 parts, from PIERBURG, FOUR SEASONS, NISSENS and 2 other brands. A representative part number is GATES 41592E.