2018 Audi A8 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 A8, from PRESTONE, PEAK, PENTOSIN and 3 other brands. FVP MV5050GAL carries the "Popular" badge. 8 parts fit every engine; the other 8 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

3 Coolant Hose / Pipe parts are listed for the 2018 Audi A8, from REIN and MOTORAD.

Part numbers include MOTORAD CH3075, REIN CHP0941 and REIN CHP1032.

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

6 Coolant Hose / Pipe Seal parts for the 2018 Audi A8 come from 4 brands — ELRING, DORMAN, AJUSA and 1 other brand. The "Popular" part is DORMAN 47451. 1 part fits every engine; the other 5 are engine-specific.

Listed part numbers: DORMAN 47451, AJUSA 16020200 and ELRING 793110, plus the other parts above.

This table covers the Coolant Hose Connector flanges. Read more

One part is listed for the 2018 Audi A8 — VAICO V105867.

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 A8 — ÜRO PARTS 357121140.

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

One part is listed for the 2018 Audi A8 — BECK/ARNLEY 1470039.

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 A8 come from 4 brands — CALORSTAT, GATES, MOTORAD and 1 other brand.

Listed part numbers: CALORSTAT RC0162, GATES 31529 and MOTORAD T49, plus the other parts above.

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

4 Cooling System Tester Adapter parts are listed for the 2018 Audi A8, from GATES and MOTORAD.

Part numbers include GATES 31433, GATES 31434 and MOTORAD 3036, among others listed above.

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

5 Intercooler parts are listed for the 2018 Audi A8, from GPD, MAHLE / CLEVITE, OSC and 2 other brands. 1 part fits every engine; the other 4 are engine-specific.

This group includes GPD 2711444, MAHLE / CLEVITE CI642000P and OSC 13809 and the remaining parts above.

This table covers the gaskets that seal the Intercooler. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

2 Intercooler Gasket parts for the 2018 Audi A8 come from ELRING.

Listed part numbers: ELRING 574890 and ELRING 574900.

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

14 Radiator parts are listed for the 2018 Audi A8, from MAHLE / CLEVITE, NISSENS and GPD. NISSENS 60351 carries the "Popular" badge.

Economy: 1 part, from GPD. A representative part number is GPD 13637C.

The Standard Replacement section: 7 options from MAHLE / CLEVITE and NISSENS. NISSENS 60351 is listed in this group.

6 ungrouped parts are 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

2 Radiator Fan Assembly parts for the 2018 Audi A8 come from 2 brands — TECHPRO and VEMO.

Listed part numbers: TECHPRO AU3115111 and VEMO V15011955.

This table covers the Radiator insulators. Read more

3 Radiator Insulator parts for the 2018 Audi A8 come from VNE.

Listed part numbers: 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 A8 come from REIN.

Listed part numbers: 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

18 Temperature Sender / Sensor parts are listed for the 2018 Audi A8, from STANDARD MOTOR PRODUCTS, GPD, BECK/ARNLEY and 10 other brands. STANDARD MOTOR PRODUCTS TS608T carries the "Popular" badge.

Economy: 5 parts, from STANDARD MOTOR PRODUCTS, GPD, HOLSTEIN and 2 other brands. A representative part number is STANDARD MOTOR PRODUCTS TS608T.

The Standard Replacement section: 10 options from BECK/ARNLEY, WALKER PRODUCTS, DELPHI and 5 other brands. BECK/ARNLEY 1580784 is listed in this group.

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

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 A8 come from 6 brands — ÜRO PARTS, MOTORAD, REIN and 3 other brands. The "Popular" part is MOTORAD 963189.

The Economy section: 2 options from ÜRO PARTS. ÜRO PARTS 06E121111AT is listed in this group.

Standard Replacement: 6 parts, from MOTORAD, REIN, CALORSTAT and 1 other brand. A representative part number is MOTORAD 963189.

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

This group includes MOTORAD 963189, ÜRO PARTS 06E121111AT and ÜRO PARTS 079121115BL and the remaining 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 A8 come from 2 brands — REIN and VEMO.

Listed part numbers: 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

17 Water Pump parts for the 2018 Audi A8 come from 9 brands — PIERBURG, FOUR SEASONS, NISSENS and 6 other brands. The "Popular" part is SKP SK6033150.

The Economy section: 3 options from SKP, ÜRO PARTS and BECK/ARNLEY. SKP SK6033150 is listed in this group.

Standard Replacement: 12 parts, from PIERBURG, SALERI, FOUR SEASONS and 3 other brands. A representative part number is GATES 41578E.

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