2015 Audi A4 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 for the 2015 Audi A4 come from 6 brands — PRESTONE, PEAK, PENTOSIN and 3 other brands. The "Popular" part is FVP MV5050GAL. 12 parts fit every engine; the other 4 are engine-specific.

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, VALVOLINE and 1 other brand — the catalog's value-priced group. FVP MV5050GAL is listed in this group.

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, AISIN, PEAK and 1 other brand supply 6 parts: built to original-equipment specification. A representative part number is AISIN ACE010.

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

9 Coolant Hose / Pipe parts for the 2015 Audi A4 come from 5 brands — REIN, ÜRO PARTS, GATES and 2 other brands. The "Popular" part is REIN CHC0712. 3 parts fit every engine; the other 6 are engine-specific.

Listed part numbers: REIN CHC0712, ÜRO PARTS 06H121131CPRM and GATES 52461, 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

7 Coolant Hose / Pipe Seal parts are listed for the 2015 Audi A4, from ELRING, MAHLE / CLEVITE, VICTOR REINZ and 3 other brands. MAHLE / CLEVITE C32208 carries the "Popular" badge. 1 part fits every engine; the other 6 are engine-specific.

Listed part numbers: MAHLE / CLEVITE C32208, VICTOR REINZ 411047900 and AJUSA 16098500, plus the other parts above.

This table covers the Coolant Hose Connector flanges. Read more

11 Coolant Hose Connector / Flange parts for the 2015 Audi A4 come from 6 brands — MOTORAD, DORMAN, ÜRO PARTS and 3 other brands. The "Popular" part is DORMAN 902714. 9 parts fit every engine; the other 2 are engine-specific.

The Economy section: 6 options from DORMAN, ÜRO PARTS and SKP. DORMAN 902714 is listed in this group.

Standard Replacement: 5 parts, from MOTORAD, REIN and VAICO. A representative part number is MOTORAD CH8714.

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

4 Coolant Hose Connector / Flange Seal parts are listed for the 2015 Audi A4, from ELRING and ÜRO PARTS. 2 parts fit every engine; the other 2 are engine-specific.

Listed part numbers: ELRING 332740, ELRING 234230 and ÜRO PARTS N90316802, 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: ÜRO PARTS 032121142.

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

8 Coolant Reservoir parts are listed for the 2015 Audi A4, from REIN, SKP, GPD and 4 other brands. REIN EPK0153 carries the "Popular" badge. 2 parts fit every engine; the other 6 are engine-specific.

This group includes REIN EPK0153, SKP SKEPT0153 and GPD 2411276 and the remaining 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

7 Coolant Reservoir Cap parts are listed for the 2015 Audi A4, from GATES, MOTORAD, CALORSTAT and 4 other brands. GATES 31529 carries the "Popular" badge. 3 parts fit every engine; the other 4 are engine-specific.

Part numbers include GATES 31529, MOTORAD T49 and CALORSTAT RC0011, among others listed above.

This table covers the Cooling Fan control modules. Read more

7 Cooling Fan Control Module parts are listed for the 2015 Audi A4, from VNE, GATES, VEMO and 3 other brands. GATES FCM157 carries the "Popular" badge. 3 parts fit every engine; the other 4 are engine-specific.

This group includes GATES FCM157, VEMO V10790027 and STANDARD MOTOR PRODUCTS RY1904 and the remaining parts above.

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

4 Cooling System Tester Adapter parts for the 2015 Audi A4 come from 2 brands — GATES and MOTORAD. 2 parts fit every engine; the other 2 are engine-specific.

Listed part numbers: GATES 31433, GATES 31434 and MOTORAD 3036, plus the other parts above.

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

9 Intercooler parts for the 2015 Audi A4 come from 9 brands — NISSENS, TYC, AGILITY and 6 other brands. The "Popular" part is NISSENS 96567. 2 parts fit every engine; the other 7 are engine-specific.

This group includes NISSENS 96567, TYC 18018 and AGILITY 5010024 and the remaining parts above.

This table covers the Intercooler Air Hose pipes. Read more

9 Intercooler Air Hose / Pipe parts for the 2015 Audi A4 come from 3 brands — VAICO, GATES and REIN. The "Popular" part is REIN TCH0322.

Listed part numbers: REIN TCH0322, REIN TCH0323 and GATES 26547, plus the other parts above.

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

24 Radiator parts for the 2015 Audi A4 come from 10 brands — NISSENS, MAHLE / CLEVITE, VEMO and 7 other brands. The "Popular" part is CSF 3518.

The Economy section: 2 options from VEMO. VEMO V15605050 is listed in this group.

Standard Replacement: 15 parts, from NISSENS, MAHLE / CLEVITE, CSF and 6 other brands. A representative part number is CSF 3518.

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

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

16 Radiator Fan Assembly parts are listed for the 2015 Audi A4, from SKP, ÜRO PARTS, MAHLE / CLEVITE and 6 other brands. SKP SK85728 carries the "Popular" badge. 6 parts fit every engine; the other 10 are engine-specific.

Economy: 6 parts, from SKP, ÜRO PARTS and GPD. A representative part number is SKP SK85728.

The Standard Replacement section: 10 options from MAHLE / CLEVITE, NISSENS, VALEO and 3 other brands. TYC 622940 is listed in this group.

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

10 Radiator Hose parts are listed for the 2015 Audi A4, from GATES, REIN, DAYCO and 1 other brand. DAYCO 72313 carries the "Popular" badge.

This table covers the Radiator insulators. Read more

VNE supplies the 3 Radiator Insulator parts for the 2015 Audi A4.

Listed part numbers: VNE 41000034, VNE 41000078 and VNE 41000079.

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

REIN supplies both parts for the 2015 Audi A4.

This group includes REIN AVM0716 and REIN AVM0702.

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

17 Temperature Sender / Sensor parts for the 2015 Audi A4 come from 16 brands — STANDARD MOTOR PRODUCTS, ÜRO PARTS, GPD and 13 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS TS608T. 7 parts fit every engine; the other 10 are engine-specific.

The Economy section: 7 options from STANDARD MOTOR PRODUCTS, ÜRO PARTS, GPD and 4 other brands. STANDARD MOTOR PRODUCTS TS608T is listed in this group.

Standard Replacement: 10 parts, from BECK/ARNLEY, STANDARD MOTOR PRODUCTS, DELPHI and 7 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

27 Thermostat parts are listed for the 2015 Audi A4, from FACET, VEMO, MAHLE / CLEVITE and 8 other brands. FACET 78743K carries the "Popular" badge. Economy and Standard Replacement are all represented, and Standard Replacement alone accounts for 21 parts.

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

17 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2015 Audi A4 come from 9 brands — ELRING, FEL-PRO, MAHLE / CLEVITE and 6 other brands. The "Popular" part is ELRING 761109. 1 part fits every engine; the other 16 are engine-specific.

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

8 Thermostat Housing / Water Outlet parts are listed for the 2015 Audi A4, from FOUR SEASONS, MOTORAD, DORMAN and 1 other brand. DORMAN 9025866 carries the "Popular" badge.

Economy: 2 parts, from DORMAN and SKP. A representative part number is DORMAN 9025866.

The Standard Replacement section: 5 options from FOUR SEASONS and MOTORAD. FOUR SEASONS 86002 is listed in this group.

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

Listed part numbers: DORMAN 9025866, SKP SK9025866 and FOUR SEASONS 86002, plus the other parts above.