2020 Audi A3 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 are listed for the 2020 Audi A3, from PRESTONE, PEAK, VALVOLINE and 3 other brands. FVP MV5050GAL carries the "Popular" badge. 11 parts fit every engine; the other 6 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 7 options from PENTOSIN, VALVOLINE, AISIN 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

4 Coolant Hose / Pipe parts are listed for the 2020 Audi A3, from REIN, ÜRO PARTS and VAICO. 1 part fits every engine; the other 3 are engine-specific.

Part numbers include REIN CHP0663, REIN CHP0793 and ÜRO PARTS 06L121131PRM, 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

3 Coolant Hose / Pipe Seal parts for the 2020 Audi A3 come from 3 brands — DORMAN, FEL-PRO and MAHLE / CLEVITE. 1 part fits every engine; the other 2 are engine-specific.

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

This table covers the Coolant Hose Connector flanges. Read more

9 Coolant Hose Connector / Flange parts are listed for the 2020 Audi A3, from VAICO, MOTORAD and REIN. VAICO V105890 carries the "Popular" badge.

This group includes VAICO V105890, VAICO V107695 and MOTORAD CH8056 and the remaining 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

One part is listed for the 2020 Audi A3 — ÜRO PARTS 357121140.

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

One part is listed for the 2020 Audi A3 — 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

6 Coolant Reservoir parts for the 2020 Audi A3 come from 5 brands — TECHPRO, REIN, ÜRO PARTS and 2 other brands. The "Popular" part is REIN EPT0142. 4 parts fit every engine; the other 2 are engine-specific.

Listed part numbers: REIN EPT0142, ÜRO PARTS 5Q0121407T and HELLA 366365551, 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 for the 2020 Audi A3 come from 3 brands — CALORSTAT, MOTORAD and REIN.

Listed part numbers: CALORSTAT RC0162, MOTORAD T93 and REIN CPE0039.

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

9 Intercooler parts are listed for the 2020 Audi A3, from NISSENS, SPECTRA PREMIUM, TYC and 6 other brands. NISSENS 96494 carries the "Popular" badge. 3 parts fit every engine; the other 6 are engine-specific.

Listed part numbers: NISSENS 96494, SPECTRA PREMIUM 44011129 and TYC 18128, plus the other parts above.

This table covers the Intercooler Air Hose pipes. Read more

3 Intercooler Air Hose / Pipe parts are listed for the 2020 Audi A3, from GATES and REIN.

This group includes GATES 26475, GATES 26486 and REIN TCH0334.

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

This group shows a single part: REIN AVM0728.

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

11 Radiator parts are listed for the 2020 Audi A3, from NISSENS, CSF, KOYORAD and 3 other brands. CSF 3922 carries the "Popular" badge. 2 parts fit every engine; the other 9 are engine-specific.

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

7 Radiator Fan Assembly parts for the 2020 Audi A3 come from 7 brands — SKP, GPD, AGILITY and 4 other brands. The "Popular" part is SKP SK621320. 4 parts fit every engine; the other 3 are engine-specific.

The Economy section: 2 options from SKP and GPD. SKP SK621320 is listed in this group.

Standard Replacement: 5 parts, from AGILITY, FOUR SEASONS, NISSENS and 2 other brands. A representative part number is AGILITY 6010318.

Listed part numbers: SKP SK621320, GPD 2812046 and AGILITY 6010318, plus the other parts above.

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: REIN CHR0794.

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 2020 Audi A3 come from VNE.

Part numbers include 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

19 Temperature Sender / Sensor parts are listed for the 2020 Audi A3, from STANDARD MOTOR PRODUCTS, GPD, HOLSTEIN and 9 other brands. STANDARD MOTOR PRODUCTS TS608T carries the "Popular" badge. 8 parts fit every engine; the other 11 are engine-specific.

Economy: 8 parts, from GPD, HOLSTEIN, STANDARD MOTOR PRODUCTS and 3 other brands. A representative part number is STANDARD MOTOR PRODUCTS TS608T.

The Standard Replacement section: 11 options from BECK/ARNLEY, STANDARD MOTOR PRODUCTS, VNE and 4 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

7 Thermostat parts for the 2020 Audi A3 come from 6 brands — MARELLI, MOTORAD, BECK/ARNLEY and 3 other brands. The "Popular" part is MOTORAD 838235. 1 part fits every engine; the other 6 are engine-specific.

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

5 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2020 Audi A3, from ELRING, MAHLE / CLEVITE and AJUSA.

This group includes AJUSA 16502300, ELRING 938850 and ELRING 453710 and the remaining parts above.

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

3 Thermostat Housing / Water Outlet parts for the 2020 Audi A3 come from 2 brands — MOTORAD and GATES.

This group includes GATES CO34954, MOTORAD CH2074 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

21 Water Pump parts for the 2020 Audi A3 come from 13 brands — PIERBURG, FOUR SEASONS, GATES and 10 other brands. The "Popular" part is BECK/ARNLEY 1312517. 2 parts fit every engine; the other 19 are engine-specific.

The Economy section: 6 options from BECK/ARNLEY, US MOTOR WORKS, FVP and 3 other brands. BECK/ARNLEY 1312517 is listed in this group.

Standard Replacement: 14 parts, from PIERBURG, FOUR SEASONS, GATES and 3 other brands. A representative part number is FOUR SEASONS 89108.

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

This table covers the gaskets between the water pump and the block or housing. 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

ELRING supplies both parts for the 2020 Audi A3.

Listed part numbers: ELRING 249150 and ELRING 323380.