2018 Audi S3 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

17 Coolant / Antifreeze parts for the 2018 Audi S3 come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is FVP MV5050GAL.

In the Compatible With All Colors grade, PRESTONE supplies 1 part: grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. A representative part number is PRESTONE AF3055.

The Economy section lists 4 options from FVP, PRESTONE, PEAK and 1 other brand — the catalog's value-priced group. FVP MV5050GAL is listed in this group.

In the Heavy Duty grade, VALVOLINE supplies 1 part: rated for severe service. A representative part number is VALVOLINE 846439.

In the Premium grade, PRESTONE and PEAK supply 5 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.

In the Standard Replacement grade, PENTOSIN, VALVOLINE, AISIN and 1 other brand supply 6 parts: built to original-equipment specification. A representative part number is VALVOLINE 861399.

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

5 Coolant Hose / Pipe parts for the 2018 Audi S3 come from 3 brands — REIN, VAICO and SKP. The "Popular" part is REIN CHP0663.

This group includes REIN CHP0663, REIN CHP0793 and SKP SK121468 and the remaining parts 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

3 Coolant Hose / Pipe Seal parts are listed for the 2018 Audi S3, from DORMAN, FEL-PRO and MAHLE / CLEVITE.

Listed part numbers: DORMAN 47451, FEL-PRO 36130 and MAHLE / CLEVITE C32354.

This table covers the Coolant Hose Connector flanges. Read more

8 Coolant Hose Connector / Flange parts for the 2018 Audi S3 come from 2 brands — VAICO and MOTORAD. The "Popular" part is VAICO V105890.

Listed part numbers: VAICO V105890, VAICO V107695 and MOTORAD CH8056, plus the other parts 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

This group shows a single part: ÜRO PARTS 357121140.

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

This group shows a single part: BECK/ARNLEY 1470039.

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

5 Coolant Reservoir parts are listed for the 2018 Audi S3, from TECHPRO, ÜRO PARTS, HELLA and 1 other brand. ÜRO PARTS 5Q0121407T carries the "Popular" badge.

Listed part numbers: ÜRO PARTS 5Q0121407T, HELLA 366365551 and REIN EPT0142, plus the other 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

3 Coolant Reservoir Cap parts are listed for the 2018 Audi S3, from CALORSTAT, MOTORAD and REIN.

Part numbers include CALORSTAT RC0162, MOTORAD T93 and REIN CPE0039.

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

3 Intercooler parts for the 2018 Audi S3 come from 3 brands — GPD, HELLA and NISSENS.

Listed part numbers: GPD 2711334, HELLA 366471091 and NISSENS 96494.

This table covers the Intercooler Air Hose pipes. Read more

7 Intercooler Air Hose / Pipe parts for the 2018 Audi S3 come from 3 brands — GATES, VAICO and REIN. The "Popular" part is GATES 26475.

Part numbers include GATES 26475, GATES 26491 and GATES 26486, among others listed above.

This table covers the Intercooler 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

REIN supplies both parts for the 2018 Audi S3.

Part numbers include REIN AVM0728 and REIN AVM0696.

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

8 Radiator parts for the 2018 Audi S3 come from 6 brands — NISSENS, CSF, TYC and 3 other brands. The "Popular" part is CSF 3922.

Listed part numbers: CSF 3922, TYC 13529 and DENSO 2219430, plus the other parts above.

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

4 Radiator Fan Assembly parts are listed for the 2018 Audi S3, from GPD, TECHPRO, NISSENS and 1 other brand.

Economy: 2 parts, from GPD and TECHPRO. A representative part number is GPD 2812046.

The Standard Replacement section: 2 options from NISSENS and UAC. NISSENS 85866 is listed in this group.

Part numbers include GPD 2812046, TECHPRO VW3115124 and NISSENS 85866, among others listed above.

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

VNE supplies both parts for the 2018 Audi S3.

This group includes VNE 41000012 and VNE 41000038.

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

16 Temperature Sender / Sensor parts for the 2018 Audi S3 come from 12 brands — STANDARD MOTOR PRODUCTS, BECK/ARNLEY, VNE and 9 other brands. The "Popular" part is HOLSTEIN 2CTS0490.

The Economy section: 5 options from HOLSTEIN, STANDARD MOTOR PRODUCTS, GPD and 2 other brands. HOLSTEIN 2CTS0490 is listed in this group.

Standard Replacement: 11 parts, from BECK/ARNLEY, VNE, WALKER PRODUCTS and 5 other brands. A representative part number is BECK/ARNLEY 1580784.

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

5 Thermostat parts are listed for the 2018 Audi S3, from MOTORAD, BECK/ARNLEY, CALORSTAT and 2 other brands. MOTORAD 838235 carries the "Popular" badge.

This group includes MOTORAD 838235, BECK/ARNLEY 1430913 and CALORSTAT TFS7195113J and the remaining parts 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

4 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2018 Audi S3 come from 3 brands — MAHLE / CLEVITE, FACET and FEL-PRO.

Part numbers include FACET 79688, FEL-PRO 36131 and MAHLE / CLEVITE 72622, among others listed above.

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

2 Thermostat Housing / Water Outlet parts are listed for the 2018 Audi S3, from GATES and MOTORAD.

Part numbers include GATES CO34954 and MOTORAD CH3116.

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 are listed for the 2018 Audi S3, from PIERBURG, FOUR SEASONS, BECK/ARNLEY and 7 other brands. BECK/ARNLEY 1312517 carries the "Popular" badge.

Economy: 4 parts, from BECK/ARNLEY, US MOTOR WORKS, FVP and 1 other brand. A representative part number is BECK/ARNLEY 1312517.

The Standard Replacement section: 13 options from PIERBURG, FOUR SEASONS, GATES and 3 other brands. GATES 42209 is listed in this group.