2021 Audi A4 Allroad 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 2021 Audi A4 Allroad come from 6 brands — PRESTONE, PEAK, PENTOSIN 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, 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

2 Coolant Hose / Pipe parts for the 2021 Audi A4 Allroad come from 2 brands — REIN and ÜRO PARTS.

Listed part numbers: REIN CHP0663 and ÜRO PARTS 06L121131PRM.

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

2 Coolant Hose / Pipe Seal parts are listed for the 2021 Audi A4 Allroad, from FEL-PRO and MAHLE / CLEVITE.

This group includes FEL-PRO 36130 and MAHLE / CLEVITE C32354.

This table covers the Coolant Hose Connector flanges. Read more

This group shows a single part: VAICO V105890.

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 Pipe adapters. Read more

One part is listed for the 2021 Audi A4 Allroad — ÜRO PARTS 06K121143PRM.

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

3 Coolant Reservoir parts are listed for the 2021 Audi A4 Allroad, from HELLA, REIN and VAICO.

This group includes HELLA 366365681, REIN EPT0281 and VAICO V105349.

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

5 Intercooler parts for the 2021 Audi A4 Allroad come from 5 brands — NISSENS, GPD, HELLA and 2 other brands. The "Popular" part is NISSENS 961466.

Part numbers include NISSENS 961466, GPD 2711413 and HELLA 366340871, among others listed 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

7 Radiator parts for the 2021 Audi A4 Allroad come from 7 brands — GPD, VEMO, TYC and 4 other brands. The "Popular" part is TYC 13665.

The Economy section: 2 options from GPD and VEMO. GPD 13665 is listed in this group.

Standard Replacement: 5 parts, from TYC, UAC, AGILITY and 2 other brands. A representative part number is TYC 13665.

This group includes TYC 13665 and VEMO V10600108 and the remaining parts above.

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

5 Radiator Fan Assembly parts are listed for the 2021 Audi A4 Allroad, from VEMO, GPD and UAC. UAC FA50946C carries the "Popular" badge.

Economy: 4 parts, from VEMO and GPD. A representative part number is GPD 2812266.

The Standard Replacement section: 1 option from UAC. UAC FA50946C is listed in this group.

This group includes UAC FA50946C, GPD 2812266 and VEMO V15011943 and the remaining parts above.

This table covers the shrouds that duct air through the fan and radiator. Read more

This group shows a single part: SKP SK621318.

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

One part is listed for the 2021 Audi A4 Allroad — GATES 52459.

This table covers the Radiator insulators. Read more

VNE supplies both parts for the 2021 Audi A4 Allroad.

This group includes VNE 41000073 and VNE 41000074.

This table covers the Radiator Insulator sleeves. Read more

One part is listed for the 2021 Audi A4 Allroad — REIN AVM0730.

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

One part is listed for the 2021 Audi A4 Allroad — REIN AVM0729.

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

9 Temperature Sender / Sensor parts for the 2021 Audi A4 Allroad come from 8 brands — VNE, ULTRA-POWER, GPD and 5 other brands. The "Popular" part is ULTRA-POWER 5S1608.

The Economy section: 3 options from ULTRA-POWER, GPD and UNITED MOTOR PRODUCTS. ULTRA-POWER 5S1608 is listed in this group.

Standard Replacement: 6 parts, from VNE, STANDARD MOTOR PRODUCTS, BECK/ARNLEY and 2 other brands. A representative part number is STANDARD MOTOR PRODUCTS TX275.

Part numbers include ULTRA-POWER 5S1608, GPD 1814521 and UNITED MOTOR PRODUCTS CTS351, among others listed above.

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

6 Thermostat parts are listed for the 2021 Audi A4 Allroad, from VEMO, BECK/ARNLEY, MOTORAD and 3 other brands. BECK/ARNLEY 1430913 carries the "Popular" badge.

Economy: 1 part, from VEMO. A representative part number is VEMO V15992133.

The Standard Replacement section: 4 options from BECK/ARNLEY, MOTORAD, AISIN and 1 other brand. BECK/ARNLEY 1430913 is listed in this group.

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

This group includes BECK/ARNLEY 1430913, VEMO V15992133 and MOTORAD 838235 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

2 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2021 Audi A4 Allroad come from MAHLE / CLEVITE.

Part numbers include MAHLE / CLEVITE 72622 and MAHLE / CLEVITE C33480.

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

2 Thermostat Housing / Water Outlet parts are listed for the 2021 Audi A4 Allroad, 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

16 Water Pump parts are listed for the 2021 Audi A4 Allroad, from PIERBURG, BECK/ARNLEY, GATES and 7 other brands. US MOTOR WORKS US8124 carries the "Popular" badge.

Economy: 5 parts, from BECK/ARNLEY, US MOTOR WORKS, FVP and 1 other brand. A representative part number is US MOTOR WORKS US8124.

The Standard Replacement section: 11 options from PIERBURG, GATES, FOUR SEASONS and 3 other brands. GATES 42209 is listed in this group.