2015 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 2015 Audi A3, 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 2015 Audi A3, from REIN, VAICO, ÜRO PARTS and 1 other brand. REIN CHP0663 carries the "Popular" badge. 1 part fits every engine; the other 5 are engine-specific.

Listed part numbers: REIN CHP0663, ÜRO PARTS 06L121131PRM and REIN CHP0793, 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 2015 Audi A3 come from 5 brands — AJUSA, DORMAN, ELRING and 2 other brands. 1 part fits every engine; the other 4 are engine-specific.

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

18 Coolant Hose Connector / Flange parts are listed for the 2015 Audi A3, from VAICO, MOTORAD, DORMAN and 3 other brands. DORMAN 627002 carries the "Popular" badge. 3 parts fit every engine; the other 15 are engine-specific.

Economy: 4 parts, from DORMAN and SKP. A representative part number is DORMAN 627002.

The Standard Replacement section: 13 options from VAICO, MOTORAD and REIN. MOTORAD CH2715 is listed in this group.

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

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 2015 Audi A3 — ÜRO PARTS 357121140.

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

2 Coolant Hose Retainer / Clip parts are listed for the 2015 Audi A3, from BECK/ARNLEY and ÜRO PARTS. 1 part fits every engine; the other 1 is engine-specific.

Part numbers include BECK/ARNLEY 1470039 and ÜRO PARTS 032121142.

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

8 Coolant Reservoir parts for the 2015 Audi A3 come from 6 brands — TECHPRO, REIN, ÜRO PARTS and 3 other brands. The "Popular" part is REIN EPT0142. 3 parts fit every engine; the other 5 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

6 Coolant Reservoir Cap parts for the 2015 Audi A3 come from 5 brands — VAICO, MOTORAD, CALORSTAT and 2 other brands. The "Popular" part is MOTORAD T49. 3 parts fit every engine; the other 3 are engine-specific.

Listed part numbers: MOTORAD T49, VAICO V100490 and CALORSTAT RC0162, plus the other parts above.

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

MOTORAD supplies both parts for the 2015 Audi A3. All of them fit every engine offered in the 2015 A3.

Listed part numbers: MOTORAD 3036 and MOTORAD 3037.

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

10 Intercooler parts are listed for the 2015 Audi A3, from NISSENS, SPECTRA PREMIUM, TYC and 7 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 2015 Audi A3, from GATES and VAICO. GATES 26475 carries the "Popular" badge.

Listed part numbers: GATES 26475, GATES 26491 and GATES 26474, plus the other 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 2015 Audi A3 come from REIN.

This group includes 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

23 Radiator parts are listed for the 2015 Audi A3, from NISSENS, VEMO, KOYORAD and 7 other brands. DENSO 2219498 carries the "Popular" badge.

Economy: 1 part, from VEMO. A representative part number is VEMO V10600053.

The Standard Replacement section: 10 options from KOYORAD, NISSENS, DENSO and 5 other brands. DENSO 2219498 is listed in this group.

12 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

9 Radiator Fan Assembly parts for the 2015 Audi A3 come from 9 brands — SKP, VEMO, GPD and 6 other brands. The "Popular" part is SKP SK621320. 2 parts fit every engine; the other 7 are engine-specific.

The Economy section: 4 options from SKP, VEMO, GPD and 1 other brand. SKP SK621320 is listed in this group.

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

Part numbers include SKP SK621320, VEMO V15011913 and GPD 2812046, among others listed 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

5 Radiator Hose parts for the 2015 Audi A3 come from 3 brands — GATES, REIN and DAYCO.

This group includes DAYCO 73068, GATES 52060 and GATES 51824 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 2015 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

27 Temperature Sender / Sensor parts are listed for the 2015 Audi A3, from STANDARD MOTOR PRODUCTS, VEMO, FACET and 13 other brands. HOLSTEIN 2CTS0490 carries the "Popular" badge. They are grouped as Economy and Standard Replacement, with Standard Replacement the largest group at 16 parts from FACET, WALKER PRODUCTS, BECK/ARNLEY and 7 other brands.

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

19 Thermostat parts for the 2015 Audi A3 come from 11 brands — VEMO, CALORSTAT, MOTORAD and 8 other brands. The "Popular" part is AISIN THRVG0014.

The Economy section: 4 options from VEMO and ÜRO PARTS. ÜRO PARTS 04L121026AH is listed in this group.

Standard Replacement: 13 parts, from CALORSTAT, MOTORAD, AISIN and 6 other brands. A representative part number is AISIN THRVG0014.

2 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

11 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2015 Audi A3, from ELRING, FEL-PRO, MAHLE / CLEVITE and 3 other brands. ELRING 453710 carries the "Popular" badge.

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

6 Thermostat Housing / Water Outlet parts for the 2015 Audi A3 come from 4 brands — MOTORAD, DANSK, GATES and 1 other brand.

Part numbers include DANSK 1114510500, GATES CO34954 and MOTORAD CH2074, among others listed above.

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

34 Water Pump parts for the 2015 Audi A3 come from 15 brands — PIERBURG, GATES, GMB and 12 other brands. The "Popular" part is BECK/ARNLEY 1312517. Grades run from Economy through Standard Replacement; Standard Replacement is the most populated section, led by PIERBURG, GATES, GMB and 5 other brands.

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

4 Water Pump Gasket parts are listed for the 2015 Audi A3, from ELRING and MAHLE / CLEVITE.

Listed part numbers: ELRING 249150, ELRING 323380 and ELRING 332850, plus the other parts above.