2017 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

16 Coolant / Antifreeze parts are listed for the 2017 Audi A3, from PRESTONE, PEAK, PENTOSIN and 3 other brands. FVP MV5050GAL carries the "Popular" badge. 11 parts fit every engine; the other 5 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

7 Coolant Hose / Pipe parts are listed for the 2017 Audi A3, from REIN, VAICO, ÜRO PARTS and 1 other brand. REIN CHP0663 carries the "Popular" badge.

Listed part numbers: REIN CHP0663, ÜRO PARTS 06L121131PRM and REIN CHE1012, plus the other 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

5 Coolant Hose / Pipe Seal parts for the 2017 Audi A3 come from 5 brands — AJUSA, DORMAN, ELRING and 2 other brands.

This group includes AJUSA 16098500, DORMAN 47451 and ELRING 703570 and the remaining parts above.

This table covers the Coolant Hose Connector flanges. Read more

23 Coolant Hose Connector / Flange parts are listed for the 2017 Audi A3, from VAICO, MOTORAD, DORMAN and 3 other brands. DORMAN 627002 carries the "Popular" badge. 3 parts fit every engine; the other 20 are engine-specific.

Economy: 5 parts, from DORMAN, SKP and VAICO. A representative part number is DORMAN 627002.

The Standard Replacement section: 18 options from VAICO, MOTORAD, REIN and 1 other brand. REIN CHC0730 is listed in this group.

This table covers the seals at the Coolant Hose Connector / Flange. 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

This group shows a single part: ELRING 332740.

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 2017 Audi A3 — ÜRO PARTS 357121140.

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

One part is listed for the 2017 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

10 Coolant Reservoir parts for the 2017 Audi A3 come from 8 brands — TECHPRO, VARIOUS MFR, REIN and 5 other brands. The "Popular" part is REIN EPT0142.

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 2017 Audi A3 come from 3 brands — MOTORAD, CALORSTAT and REIN. 1 part fits every engine; the other 3 are engine-specific.

Part numbers include CALORSTAT RC0162, MOTORAD T49 and MOTORAD T93, among others listed above.

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

MOTORAD supplies both parts for the 2017 Audi A3.

Listed part numbers: MOTORAD 3036 and MOTORAD 3037.

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

11 Intercooler parts are listed for the 2017 Audi A3, from NISSENS, GPD, SPECTRA PREMIUM and 6 other brands. NISSENS 96494 carries the "Popular" badge.

This table covers the Intercooler Air Hose pipes. Read more

6 Intercooler Air Hose / Pipe parts are listed for the 2017 Audi A3, from GATES and VAICO. GATES 26475 carries the "Popular" badge.

This group includes GATES 26475, GATES 26491 and GATES 26474 and the remaining parts 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

2 Intercooler Mount parts for the 2017 Audi A3 come from REIN.

This group includes REIN AVM0728 and REIN AVM0696.

This table covers the Inverter coolers. Typical signs include overheated fluid, a leak at the fittings, or mixed fluids in the reservoir. Flush the lines when you replace a cooler. Read more

This group shows a single part: KOYORAD A14021.

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

23 Radiator parts are listed for the 2017 Audi A3, from NISSENS, MAHLE / CLEVITE, CSF and 6 other brands. CSF 3974 carries the "Popular" badge.

Economy: 1 part, from TECHPRO. A representative part number is TECHPRO AU3010156.

The Standard Replacement section: 9 options from MAHLE / CLEVITE, NISSENS, CSF and 4 other brands. CSF 3974 is listed in this group.

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

This table covers the caps that hold system pressure at the radiator or reservoir neck. 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

One part is listed for the 2017 Audi A3 — VAICO V100890.

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

10 Radiator Fan Assembly parts for the 2017 Audi A3 come from 9 brands — VEMO, SKP, GPD and 6 other brands. The "Popular" part is SKP SK621320. 1 part fits every engine; the other 9 are engine-specific.

The Economy section: 5 options from VEMO, SKP, GPD and 1 other brand. 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.

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

4 Radiator Hose parts for the 2017 Audi A3 come from 3 brands — REIN, DAYCO and GATES.

This group includes DAYCO 73068, GATES 51835 and REIN CHR0773 and the remaining parts 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

4 Radiator Mount parts for the 2017 Audi A3 come from 2 brands — REIN and VNE.

Part numbers include REIN AVM0728, REIN AVM0696 and VNE 41000012, among others listed above.

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

25 Temperature Sender / Sensor parts are listed for the 2017 Audi A3, from STANDARD MOTOR PRODUCTS, GPD, VEMO and 11 other brands. HOLSTEIN 2CTS0490 carries the "Popular" badge. 6 parts fit every engine; the other 19 are engine-specific.

Economy: 12 parts, from GPD, VEMO, HOLSTEIN and 4 other brands. A representative part number is HOLSTEIN 2CTS0490.

The Standard Replacement section: 13 options from BECK/ARNLEY, WALKER PRODUCTS, STANDARD MOTOR PRODUCTS and 5 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

18 Thermostat parts for the 2017 Audi A3 come from 7 brands — CALORSTAT, MOTORAD, VEMO and 4 other brands. The "Popular" part is MOTORAD 964189.

The Economy section: 2 options from VEMO. VEMO V15991915 is listed in this group.

Standard Replacement: 13 parts, from CALORSTAT, MOTORAD, FACET and 3 other brands. A representative part number is MOTORAD 964189.

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

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

12 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2017 Audi A3, from ELRING, MAHLE / CLEVITE, FEL-PRO and 3 other brands. ELRING 453710 carries the "Popular" badge.

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

9 Thermostat Housing / Water Outlet parts for the 2017 Audi A3 come from 4 brands — MOTORAD, VEMO, GATES and 1 other brand. The "Popular" part is GATES CO35032.

The Economy section: 2 options from VEMO. VEMO V15992117 is listed in this group.

Standard Replacement: 4 parts, from GATES, FOUR SEASONS and MOTORAD. A representative part number is GATES CO35032.

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

Part numbers include GATES CO35032, VEMO V15992117 and VEMO V15992116, among others listed above.