Thermostat

The thermostat in your vehicle is a small device that sits between the engine and the radiator. This device blocks the flow of coolant to the radiator until the engine has warmed up properly. A properly functioning thermostat is key to your vehicle's safety and temperature regulation. One way to ensure that your thermostat is working correctly is by checking the gauges on your Audi's dashboard. The thermostat may be bad or failing if the gauge goes into the red zone within the first 15 minutes of warming up. It is crucial to replace the thermostat when necessary as a bad thermostat can cause your car to overheat. When your thermostat isn't working correctly, it is nearly impossible for your engine to get the right amount of coolant, making it difficult for it to operate at safe levels. Overheating is just as dangerous as temperatures being too low, so replace your old and failing thermostat through our webstore. Our webstore carries only the highest-quality replacement thermostats on the market, made specifically with Audi models in mind. Browse through our OEM products today, and make sure your Audi is running and operating at only the safest temperatures possible. Start shopping now!

Thermostat Housing
06C-121-111-E
Other Names: Thermostat More
Replaces: 06C-121-111-C
Description: 3.0 LITER More
Fits:
  • Audi:
    • A4,
    • A4 Quattro,
    • A6,
    • A6 Quattro
$83.33
$62.50
$83.33
$62.50
Thermostat Unit
06D-121-111-G
Other Names: Thermostat Housing, Thermostat More
Description: A4; FROM 5400001 More
Fits:
  • Audi:
    • A4,
    • A4 Quattro
$83.33
$62.50
$83.33
$62.50
Thermostat Unit
06E-121-111-AL
Other Names: Thermostat, Thermostat Housing More
Replaces: 06E-121-111-AD, 06E-121-111-S, 06E-121-111-T
Description: Q7 More
Notes: Includes Thermostat And Gasket. More
Fits:
  • Audi:
    • A6 Quattro,
    • A7 Quattro,
    • A8 Quattro,
    • Q5,
    • Q7,
    • S4,
    • S5,
    • SQ5
  • 3 more
$55.80
$41.85
$55.80
$41.85
Thermostat Housing
06F-121-111-H
Other Names: Thermostat Unit, Thermostat More
Description: TT; W/TTS MODEL More
Fits:
  • Audi:
    • TT,
    • TT Quattro
$63.33
$47.50
$63.33
$47.50
Thermostat Unit
06L-121-111-M
Other Names: Thermostat, Thermostat Housing More
Replaces: 06L-121-111-F, 06L-121-111-G, 06L-121-111-H, 06L-121-111-J, 06L-121-111-K, 06L-121-111-L
Description: A6 More
Fits:
  • Audi:
    • A3,
    • A3 Quattro,
    • A4,
    • A4 allroad,
    • A4 Quattro,
    • A5 Quattro,
    • A5 Sportback,
    • A6,
    • A6 Quattro,
    • Q5,
    • Q7,
    • S3,
    • TT Quattro
  • 8 more
$280.00
$198.24
$280.00
$198.24
Thermostat Unit
06M-121-115-H
Other Names: Thermostat, Thermostat Housing, Housing More
Replaces: 06M-121-115-G
Description: SQ5; TO 02/03/2019 More
Fits:
  • Audi:
    • Q8,
    • RS5,
    • S4,
    • S5,
    • S5 Sportback,
    • SQ5
  • 1 more
$162.72
$117.16
$162.72
$117.16
Thermostat Unit
022-121-111-H
Other Names: Thermostat Housing, Housing More
Description: TT More
Notes: Includes Thermostat & Gasket. More
Fits:
  • Audi:
    • A3 Quattro,
    • TT Quattro
$258.33
$182.90
$258.33
$182.90
Thermostat Unit
03L-121-111-AC
Other Names: Thermostat Housing, Thermostat More
Replaces: 03L-121-111-M
Description: 2.0 LITER, DIESEL More
Notes: Includes Thermostat. More
Fits:
  • Audi:
    • A3,
    • A3 Quattro
$85.00
$61.20
$85.00
$61.20
Thermostat Housing
059-121-111-R
Other Names: Thermostat Unit, Thermostat More
Description: Q7 More
Notes: Includes Thermostat & Gasket. More
Fits:
  • Audi:
    • Q7
$63.33
$47.50
$63.33
$47.50
Thermostat Housing
06H-121-121-L
Other Names: Thermostat Cover, Thermostat Outlet, Cover More
Replaces: 06H-121-121-K
Description: MAIN More
Notes: Part Inclued With Water Pump Assembly. More
Fits:
  • Audi:
    • A3,
    • A3 Quattro,
    • A4,
    • A4 Quattro,
    • A5,
    • A5 Quattro,
    • A6,
    • A6 Quattro,
    • allroad,
    • Q3,
    • Q3 Quattro,
    • Q5,
    • TT,
    • TT Quattro
  • 9 more
$21.60
$13.93
$21.60
$13.93
Thermostat Housing
06J-121-121
Other Names: Thermostat Outlet, Cover More
Description: ALLROAD More
Notes: Part Inclued With Water Pump Assembly. More
Fits:
  • Audi:
    • A3,
    • A3 Quattro,
    • A4,
    • A4 Quattro,
    • A5,
    • A5 Quattro,
    • A6,
    • A6 Quattro,
    • allroad,
    • Q5
  • 5 more
$21.60
$13.93
$21.60
$13.93
Thermostat Housing
06B-121-111-K
Other Names: Thermostat More
Replaces: 06B-121-111-D, 06B-121-111-G, 06B-121-111-H
Description: 1.8 LITER More
Fits:
  • Audi:
    • A4,
    • A4 Quattro
$193.33
$136.88
$193.33
$136.88
Thermostat Unit
06E-121-111-AT
Positions: Front
Other Names: Thermostat, Water Pump, Thermostat Housing More
Description: A7; 3.0L GAS More
Notes: Includes Thermostat Gasket. More
Fits:
  • Audi:
    • A6 Quattro,
    • A7 Quattro,
    • A8 Quattro,
    • Q7
$39.43
$30.52
$39.43
$30.52
Thermostat Unit
06E-121-111-G
Other Names: Thermostat, Thermostat Housing More
Replaces: 06E-121-111-D
Description: A4 More
Fits:
  • Audi:
    • A4,
    • A4 Quattro,
    • A6,
    • A6 Quattro
$148.33
$106.80
$148.33
$106.80
Thermostat Unit
06E-121-111-M
Other Names: Thermostat Housing, Thermostat More
Description: A6; 3.2L More
Notes: Includes Thermostat And Gasket. More
Fits:
  • Audi:
    • A4 Quattro,
    • A5 Quattro,
    • A6,
    • Q5
$83.33
$62.50
$83.33
$62.50
Thermostat Unit
06F-121-111-F
Other Names: Thermostat, Thermostat Housing More
Description: A3; 2.0L More
Fits:
  • Audi:
    • A3,
    • TT,
    • TT Quattro
$63.33
$47.50
$63.33
$47.50
Engine Coolant Thermostat
069-121-113
Other Names: Thermostat More
Description: ALL MODELS More
Fits:
  • Audi:
    • 100,
    • 100 Quattro,
    • 200,
    • 200 Quattro,
    • 4000 Quattro,
    • 5000,
    • 5000 Quattro,
    • 80,
    • 80 Quattro,
    • 90,
    • 90 Quattro,
    • Coupe,
    • Coupe Quattro,
    • Quattro,
    • S4,
    • S6
  • 11 more
$61.67
$46.25
$61.67
$46.25
Thermostat Housing Gasket
06J-121-119-B
Other Names: Gasket, Thermostat Gasket, Thermostat Cover Seal, Thermostat Housing O-Ring, Thermostat Outlet O-Ring, Seal Ring More
Replaces: 06J-121-119-A
Description: A3; 2.0L More
Notes: Part Inclued With Water Pump Assembly. More
Fits:
  • Audi:
    • A3,
    • A3 Quattro,
    • A4,
    • A4 Quattro,
    • A5,
    • A5 Quattro,
    • A6,
    • A6 Quattro,
    • allroad,
    • Q5
  • 5 more
$5.36
$3.46
$5.36
$3.46
Thermostat Housing Gasket
021-121-119-A
Other Names: Thermostat Unit Gasket, Gasket More
Description: 3.2 LITER More
Notes: Included With Thermsotat Unit. More
Fits:
  • Audi:
    • A3 Quattro,
    • TT Quattro
$7.92
$5.11
$7.92
$5.11
Thermostat Unit O-Ring
06B-121-119-C
Other Names: Thermostat O-Ring, Thermostat Unit Seal, Thermostat Seal, Thermostat Unit Gasket, Gasket, Washer More
Description: 3.0 LITER More
Notes: Included With Thermostat Unit. More
Fits:
  • Audi:
    • A3,
    • A4,
    • A4 Quattro,
    • A6,
    • A6 Quattro,
    • TT,
    • TT Quattro
  • 2 more
$11.78
$7.60
$11.78
$7.60
Thermostat Housing O-Ring
06H-121-119-E
Other Names: Thermostat Gasket, Gasket, Thermostat Cover Seal, Thermostat Outlet Seal, Thermostat Housing Gasket, Thermostat Outlet O-Ring,... More
Description: Q3 More
Notes: Part Inclued With Water Pump Assembly. More
Fits:
  • Audi:
    • A3,
    • A4,
    • A4 Quattro,
    • A5,
    • A5 Quattro,
    • A6,
    • A6 Quattro,
    • allroad,
    • Q3,
    • Q3 Quattro,
    • Q5,
    • TT,
    • TT Quattro
  • 8 more
$5.36
$3.46
$5.36
$3.46
Thermostat
044-121-113
Replaces: 056-121-113-D
Description: 4000, COUPE; W/4000S More
Fits:
  • Audi:
    • 4000,
    • 4000 Quattro,
    • 80,
    • 90,
    • Coupe
$46.40
$29.93
$46.40
$29.93
Thermostat
050-121-113-B
Description: 1.8 LITER, 225 HORSEPOWER More
Fits:
  • Audi:
    • TT,
    • TT Quattro
$44.40
$28.64
$44.40
$28.64
Thermostat
050-121-113-C
Description: TT More
Fits:
  • Audi:
    • A4,
    • A4 Quattro,
    • TT,
    • TT Quattro
$36.60
$23.61
$36.60
$23.61
Thermostat
059-115-201-B
Description: A7; 3.0L TDI More
Notes: Includes Thermostat Gasket. More
Fits:
  • Audi:
    • A7 Quattro
$51.67
$38.75
$51.67
$38.75
Thermostat
022-121-113
Description: TT; 3.2L More
Notes: Included With Thermsotat Unit. More
Fits:
  • Audi:
    • A3 Quattro,
    • TT Quattro
$61.67
$46.25
$61.67
$46.25
Thermostat
04E-121-113-C
Positions: Outer
Description: A3 More
Notes: Included With Water Pump Assembly. More
Fits:
  • Audi:
    • A3 Sportback e-tron
$55.00
$41.25
$55.00
$41.25
Thermostat
04E-121-113-B
Positions: Inner
Description: 1.4 LITER, INNER More
Notes: Included With Water Pump Assembly. More
Fits:
  • Audi:
    • A3 Sportback e-tron
$55.00
$41.25
$55.00
$41.25
Thermostat
06H-121-113-B
Description: Q3 More
Notes: Part Inclued With Water Pump Assembly. More
Fits:
  • Audi:
    • A3,
    • A3 Quattro,
    • A4,
    • A4 Quattro,
    • A5,
    • A5 Quattro,
    • A6,
    • A6 Quattro,
    • allroad,
    • Q3,
    • Q3 Quattro,
    • Q5,
    • TT,
    • TT Quattro
  • 9 more
$61.67
$46.25
$61.67
$46.25
Thermostat
06J-121-113-A
Description: A3; 2.0L More
Notes: Part Inclued With Water Pump Assembly. More
Fits:
  • Audi:
    • A3,
    • A3 Quattro,
    • A4,
    • A4 Quattro,
    • A5,
    • A5 Quattro,
    • Q5,
    • TT Quattro
  • 3 more
$91.67
$66.00
$91.67
$66.00
Thermostat
03H-121-113-D
Replaces: 03H-121-113
Description: Q7 More
Fits:
  • Audi:
    • Q7
$61.67
$46.25
$61.67
$46.25
Thermostat
04E-121-113-F
Positions: Inner
Description: 1.4 LITER, INNER More
Notes: Included With Water Pump Assembly. More
Fits:
  • Audi:
    • A3 Sportback e-tron
$55.00
$41.25
$55.00
$41.25
Thermostat
04E-121-113-G
Positions: Outer
Description: 1.4 LITER, OUTER More
Notes: Included With Water Pump Assembly. More
Fits:
  • Audi:
    • A3 Sportback e-tron
$46.50
$35.99
$46.50
$35.99
Thermostat
04L-121-113-C
Description: 2.0 LITER, DIESEL, MAIN More
Notes: Included With Thermostat Unit. More
Fits:
  • Audi:
    • A3
$36.60
$23.61
$36.60
$23.61
Thermostat
06J-121-113-C
Description: Q5 More
Fits:
  • Audi:
    • A4,
    • A4 Quattro,
    • A5,
    • A5 Quattro,
    • A6,
    • A6 Quattro,
    • allroad,
    • Q5
  • 3 more
$91.67
$66.00
$91.67
$66.00
Gasket
06E-121-119-B
Other Names: Thermostat Unit Gasket, Thermostat Gasket More
Description: GAS, MAIN More
Notes: Included With Thermostat Unit. More
Fits:
  • Audi:
    • A6,
    • A6 Quattro,
    • A7 Quattro,
    • A8 Quattro,
    • Q5,
    • Q7,
    • S4,
    • S5,
    • SQ5
  • 4 more
$15.24
$9.83
$15.24
$9.83
Thermostat Housing
04E-121-116-C
Other Names: Housing More
Description: A3 More
Notes: Included With Water Pump Assembly. More
Fits:
  • Audi:
    • A3 Sportback e-tron
$130.00
$93.60
$130.00
$93.60
Thermostat Outlet
04E-121-121-L
Other Names: Cover More
Replaces: 04E-121-121-E
Description: 1.4 LITER More
Notes: Included With Water Pump Assembly. More
Fits:
  • Audi:
    • A3 Sportback e-tron
$15.84
$10.22
$15.84
$10.22
Thermostat Housing
055-121-121-F
Other Names: Adapter More
Description: 4000, COUPE, QUATTRO; 4 CYL More
Fits:
  • Audi:
    • 4000,
    • 80,
    • 90
$21.00
$13.55
$21.00
$13.55
Thermostat Housing
06B-121-121-L
Other Names: Adapter More
Replaces: 06B-121-121
Description: S6 More
Fits:
  • Audi:
    • A4,
    • A4 Quattro,
    • S6
$14.64
$9.44
$14.64
$9.44
Thermostat Seal
038-121-119-B
Other Names: Washer More
Description: 1.8 LITER More
Fits:
  • Audi:
    • 4000,
    • 80,
    • 90,
    • A4,
    • A4 Quattro,
    • TT,
    • TT Quattro
  • 2 more
$3.86
$2.49
$3.86
$2.49
Thermostat Cover
03H-121-121-C
Other Names: Cover More
Description: Q7 More
Fits:
  • Audi:
    • Q7
$38.20
$24.64
$38.20
$24.64
Thermostat Housing
022-121-117-C
Other Names: Housing More
Description: TT; 3.2L More
Fits:
  • Audi:
    • A3 Quattro,
    • TT Quattro
$85.00
$61.20
$85.00
$61.20
Thermostat Cover
022-121-121-E
Other Names: Adapter More
Replaces: 021-121-121-D
Description: 3.2 LITER More
Notes: Included With Thermsotat Unit. More
Fits:
  • Audi:
    • A3 Quattro,
    • TT Quattro
$41.20
$26.57
$41.20
$26.57
Thermostat Housing
030-121-121-B
Other Names: Cover, Adapter More
Description: 4 CYLINDER More
Fits:
  • Audi:
    • A4,
    • A4 Quattro
$18.24
$11.76
$18.24
$11.76
Thermostat Housing
03H-121-117-A
Other Names: Housing More
Description: Q7 More
Fits:
  • Audi:
    • Q7
$106.67
$76.80
$106.67
$76.80
Thermostat Unit
04L-121-026-AE
Other Names: Housing More
Replaces: 04L-121-026-F, 04L-121-026-Q
Description: 2.0 LITER, DIESEL, MAIN More
Notes: Includes Thermostat. More
Fits:
  • Audi:
    • A3
$130.00
$93.60
$130.00
$93.60
Thermostat Housing
06A-121-121-C
Other Names: Housing, Adapter More
Description: 1.8 LITER More
Fits:
  • Audi:
    • TT,
    • TT Quattro
$19.08
$12.31
$19.08
$12.31
Connector Hose Clamp
06B-145-917
Positions: Left Rear, Left Upper, Left Front, Right Rear, Right Upper, Right Front
Other Names: Center Hose Clamp, Upper Hose Clamp, Overflow Hose Clamp, Inlet Hose Clip, Thermostat Housing Clip, Elbow Clamp, Front Hose Clamp,... More
Description: 2.5 LITER, REAR, TO THERMOSTAT UNIT More
Fits:
  • Audi:
    • A3,
    • A4,
    • A4 Quattro,
    • A6 Quattro,
    • Q7,
    • R8,
    • RS4,
    • RS5,
    • S4,
    • S5,
    • S8,
    • TT,
    • TT Quattro
  • 8 more
$8.56
$5.52
$8.56
$5.52
Seal
06L-121-139-A
Other Names: Gasket, Thermostat Unit Seal, Thermostat Gasket, Thermostat Housing Seal, Thermostat Housing Gasket, Seal More
Replaces: 06L-121-139
Description: A4 allroad. A3, S3. TT. Q7. A6. A5. Q5. 2017-18. 2.0L, 2016-18. Sedan, 1.8L, main. 2.0L, code cntb, main. Engine code cyfb, main. Engine... More
Notes: Included With Thermostat Housing. More
$43.00
$27.74
$43.00
$27.74

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