2021 Audi TT 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 TT come from 6 brands — PRESTONE, PEAK, PENTOSIN and 3 other brands. The "Popular" part is FVP MV5050GAL. 15 parts fit every engine; the other 1 is 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

3 Coolant Hose / Pipe parts for the 2021 Audi TT come from 2 brands — REIN and VAICO.

This group includes REIN CHP0663, REIN CHP0793 and VAICO V105893.

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

4 Coolant Hose / Pipe Seal parts are listed for the 2021 Audi TT, from AJUSA, DORMAN, FEL-PRO and 1 other brand. 1 part fits every engine; the other 3 are engine-specific.

Part numbers include AJUSA 01165600, DORMAN 47451 and FEL-PRO 36130, among others listed above.

This table covers the Coolant Hose Connector flanges. Read more

10 Coolant Hose Connector / Flange parts for the 2021 Audi TT come from 4 brands — VAICO, MOTORAD, REIN and 1 other brand. The "Popular" part is 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 overflow / expansion tanks that hold extra coolant. Read more

6 Coolant Reservoir parts are listed for the 2021 Audi TT, from TECHPRO, REIN, ÜRO PARTS and 2 other brands. REIN EPT0142 carries the "Popular" badge. 2 parts fit every engine; the other 4 are engine-specific.

This group includes REIN EPT0142, ÜRO PARTS 5Q0121407T and HELLA 366365551 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

3 Coolant Reservoir Cap parts are listed for the 2021 Audi TT, from CALORSTAT, MOTORAD and REIN. All of them fit every engine offered in the 2021 TT.

Part numbers include CALORSTAT RC0162, MOTORAD T93 and REIN CPE0039.

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

6 Intercooler parts for the 2021 Audi TT come from 6 brands — NISSENS, GPD, SPECTRA PREMIUM and 3 other brands. The "Popular" part is NISSENS 96494.

This group includes NISSENS 96494, GPD 2711334 and SPECTRA PREMIUM 44011129 and the remaining parts above.

This table covers the Intercooler Air Hose pipes. Read more

2 Intercooler Air Hose / Pipe parts for the 2021 Audi TT come from 2 brands — REIN and VAICO.

This group includes REIN TCH0334 and VAICO V10000135.

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

One part is listed for the 2021 Audi TT — 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

6 Radiator parts for the 2021 Audi TT come from 5 brands — NISSENS, CSF, TYC and 2 other brands. The "Popular" part is CSF 3922.

This group includes CSF 3922, TYC 13529 and DENSO 2219430 and the remaining parts above.

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

8 Radiator Fan Assembly parts are listed for the 2021 Audi TT, from GPD, NISSENS, TECHPRO and 3 other brands. AGILITY 6010318 carries the "Popular" badge. 1 part fits every engine; the other 7 are engine-specific.

Economy: 3 parts, from GPD and TECHPRO. A representative part number is GPD 2812046.

The Standard Replacement section: 5 options from NISSENS, AGILITY, FOUR SEASONS and 1 other brand. AGILITY 6010318 is listed in this group.

Part numbers include AGILITY 6010318, GPD 2812046 and GPD 2812297, 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

One part is listed for the 2021 Audi TT — 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

3 Radiator Mount parts are listed for the 2021 Audi TT, from VNE and REIN. 2 parts fit every engine; the other 1 is engine-specific.

Part numbers include REIN AVM0728, 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

16 Temperature Sender / Sensor parts for the 2021 Audi TT come from 11 brands — STANDARD MOTOR PRODUCTS, GPD, BECK/ARNLEY and 8 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS TS608T. 9 parts fit every engine; the other 7 are engine-specific.

The Economy section: 6 options from GPD, STANDARD MOTOR PRODUCTS, HOLSTEIN and 2 other brands. STANDARD MOTOR PRODUCTS TS608T is listed in this group.

Standard Replacement: 10 parts, from BECK/ARNLEY, VNE, WALKER PRODUCTS and 4 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

3 Thermostat parts are listed for the 2021 Audi TT, from BECK/ARNLEY, INA and MOTORAD.

Listed part numbers: BECK/ARNLEY 1430913, INA XW0360 and MOTORAD 838235.

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 for the 2021 Audi TT come from 4 brands — MAHLE / CLEVITE, ELRING, FACET and 1 other brand. The "Popular" part is ELRING 453710.

This group includes ELRING 453710, FACET 79688 and FEL-PRO 36131 and the remaining parts above.

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

One part is listed for the 2021 Audi TT — 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

15 Water Pump parts are listed for the 2021 Audi TT, from PIERBURG, SALERI, BECK/ARNLEY and 6 other brands. BECK/ARNLEY 1312517 carries the "Popular" badge.

Economy: 4 parts, from BECK/ARNLEY, US MOTOR WORKS, FVP and 1 other brand. A representative part number is BECK/ARNLEY 1312517.

The Standard Replacement section: 10 options from PIERBURG, SALERI, GMB and 2 other brands. GMB 1803050 is listed in this group.

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