How should you mark the direction of rotation for the accessory and timing belts around the Thermostat before removal on Audi A6?

Before removal, mark both the accessory belt and timing belt with their direction of rotation. Lift the vehicle safely and support it. Detach the front bumper and set the lock carrier in servicing positioning. Take out the viscous fan and accessory belt. Before removing the belt, mark the direction of rotation if the belt is to be reused Take off the timing belt, marking its direction of rotation for reuse if required. To remove the thermostat, drain the coolant and take off the mounting bolts of thermostat cover. As removal is in the reverse order of fitting, ensure fitment of the thermostat and tighten the bolts as appropriate. Also, check for leaks during restart of the engine. Ensure to lubricate the new thermostat sealing O-ring with coolant and to install the thermostat with the bleeder valve at its top. Bleed the cooling system after topping-off and completing assembly.

Genuine Audi A6 Thermostat

Engine Coolant Thermostat

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8 Thermostats found

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Audi A6 Water Pump Housing Part Number: 06L-121-111-P
$415.21 MSRP: $581.53
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Product Specifications
- Other Name: Thermostat; Thermostat Housing, Thermostat Unit
- Replaced by: 06L-121-111-N
- Replaces: 06L-121-111-M, 06L-121-111-L, 06L-121-111-F, 06L-121-111-H, 06L-121-111-J, 06L-121-111-G, 06L-121-111-K
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2012-2018 Audi A6 | Premium, Premium Plus, Sport | 4 Cyl 2.0 L GAS
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Audi A6 Thermostat Part Number: 06H-121-113-B
$90.43 MSRP: $126.65
You Save: $36.22 (29%)
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Product Specifications
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2012-2015 Audi A6 | Premium, Premium Plus | 4 Cyl 2.0 L GAS
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Audi A6 Thermostat Housing Part Number: 06C-121-111-E
$117.80 MSRP: $164.98
You Save: $47.18 (29%)
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Product Specifications
- Other Name: Thermostat
- Replaces: 06C-121-111-C
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2002-2004 Audi A6 | Base | 6 Cyl 3.0 L GAS
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Audi A6 Thermostat Housing Part Number: 06E-121-111-M
$120.19 MSRP: $168.34
You Save: $48.15 (29%)
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Product Specifications
- Other Name: Thermostat; Thermostat Unit
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2009-2011 Audi A6 | Base | 6 Cyl 3.2 L GAS
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Audi A6 Thermostat Housing Part Number: 06E-121-111-G
$120.19 MSRP: $168.33
You Save: $48.14 (29%)
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Product Specifications
- Other Name: Thermostat; Thermostat Unit
- Replaces: 06E-121-111-D
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2006-2011 Audi A6 | Base | 6 Cyl 3.2 L GAS
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Audi A6 Thermostat Part Number: 078-121-113-F
$47.90 MSRP: $65.98
You Save: $18.08 (28%)
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Product Specifications
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 1998-2001 Audi A6 | Base | 6 Cyl 2.8 L GAS
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Audi A6 Thermostat Part Number: 078-121-113-G
$47.90 MSRP: $65.98
You Save: $18.08 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2000-2001 Audi A6 | Base | 6 Cyl 2.8 L GAS
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Audi A6 Thermostat Valve Part Number: 4E0-121-113
$52.86 MSRP: $72.82
You Save: $19.96 (28%)
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Product Specifications
- Other Name: Thermostat; Valve
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2012-2018 Audi A6 | Premium, Premium Plus, Sport | 4 Cyl 2.0 L GAS

Audi A6 Thermostat

Audi A6 Thermostat is applied to maintain the engine temperature at the optimum range to ensure that the cooling system maintains the vehicle running efficiently. This Audi Thermostat component is located close to the radiator and is able to detect coolant warmth and react to it by a closed loop system opening or closing a passage allowing heat-transfer fluid to flow in or out of the system, depending on the required operation to avoid excessive overheating or overcooling. Within its casing, a mechanical wax pellet component swells during heat and contracts when the temperatures drop, pushing a valve that opens or closes that path, allowing the coolant to flow through the radiator or closing that path until enough heat is generated. This is a basic but effective measure that does not need any external modification and enables the Audi powertrain to reach operating temperature and then be constant throughout the driving process. Since the same basic system is applied to deal with the increasing and decreasing temperature, the system reduces variation that might lead to decreased efficiency or performance. The Thermostat is an automatic device that opens and closes the valve when the coolant temperature falls below the calibrated setpoint. The pellet shrinks, restricting the flow and saving heat. When the temperature increases, the expansion re-opens the path allowing the excess heat to escape via the radiator. The design is applicable to the entire Audi range and no alternative styles that are unique to the A6 are verified. Consequently, owners can count on a single testable setup that will fit engine cooling components on all Audi A6s they come across, and this Thermostat is the key to smooth running.

Choose original equipment manufacturer Thermostat for great performance and strong durability. They use Audi's official craftsmanship and high-grade materials, and meet strict quality standards. Are you looking for quality Thermostat at a good price? Come to our online store. We carry a wide range of genuine parts for your Audi A6 and the prices are competitive. Each part comes with the manufacturer's warranty. You can install with confidence and get steady results. Over time, you'll save money and avoid hassle. Keep your maintenance simple and protect your vehicle with OEM parts. Get the quality your A6 needs now.

Audi A6 Thermostat Parts and Q&A

Thermostat Housing
06C-121-111-E
Q:
How should you mark the direction of rotation for the accessory and timing belts around the Thermostat before removal on Audi A6?
A:
Before removal, mark both the accessory belt and timing belt with their direction of rotation. Lift the vehicle safely and support it. Detach the front bumper and set the lock carrier in servicing positioning. Take out the viscous fan and accessory belt. Before removing the belt, mark the direction of rotation if the belt is to be reused Take off the timing belt, marking its direction of rotation for reuse if required. To remove the thermostat, drain the coolant and take off the mounting bolts of thermostat cover. As removal is in the reverse order of fitting, ensure fitment of the thermostat and tighten the bolts as appropriate. Also, check for leaks during restart of the engine. Ensure to lubricate the new thermostat sealing O-ring with coolant and to install the thermostat with the bleeder valve at its top. Bleed the cooling system after topping-off and completing assembly.