AUDI 078121121K Thermostat Coolant Housing 2.7T

( Manufacturer Part Number: 078121121K ), ( Mounting Style: Bolt-on ), ( Type: Thermostat Housing ), ( Fitment Type: Direct Replacement ), ( Material: Plastic ), ( Features: Oem Part ), ( Country Of Origin: Germany )

Review AUDI 2.7t Thermostat Coolant Housing Oem fits ALLROAD B5 S4 C5 A6 2000–2005

Audi 078121121K 00-05 B5 S4 Allroad C5 A6 2.7T Thermostat Coolant Housing

The Audi 078121121K thermostat coolant housing is a crucial component in the cooling system of various Audi models, including the B5 S4 Allroad and C5 A6 2.7T. This part ensures the efficient circulation of coolant between the engine and the radiator.

This thermostat coolant housing is meticulously engineered to fit perfectly into your Audi vehicle. It is precision-molded from high-quality materials that provide excellent durability and resistance to corrosion. The housing is designed to securely house the thermostat and gasket, ensuring a reliable seal and optimal cooling performance.

The Audi 078121121K thermostat coolant housing is a direct factory replacement, meaning it is an exact match to the original part in terms of size, shape, and function. Installing this part in your vehicle will restore the cooling system to its original efficiency and reliability.

This thermostat coolant housing comes with a detailed installation guide to make the replacement process as smooth as possible. The guide includes clear steps and diagrams to help you complete the job confidently and efficiently.

By choosing the Audi 078121121K thermostat coolant housing, you are investing in the long-term health and performance of your vehicle. This component is essential for maintaining the optimal operating temperature of the engine, ensuring a comfortable driving experience and preventing potential damage to the engine.

In summary, the Audi 078121121K 00-05 B5 S4 Allroad C5 A6 2.7T Thermostat Coolant Housing is a high-quality, factory-engineered replacement part designed to restore the cooling system of your Audi to its optimal performance. It is meticulously crafted from durable materials and features a detailed installation guide to make the replacement process as seamless as possible.

Pros and Cons of Buying an Audi 03-05 B5 S4 Allroad/C5 A6 2.7T Thermostat Coolant Housing

The Audi 03-05 B5 S4 Allroad and C5 A6 2.7T share a common engine, and the thermostat coolant housing is a crucial component in maintaining optimal engine temperature. Replacing a faulty or worn-out thermostat coolant housing can help improve your vehicle's performance and prevent potential engine damage. In this article, we will discuss the advantages and disadvantages of buying an aftermarket Audi 03-05 B5 S4 Allroad/C5 A6 2.7T thermostat coolant housing.

1. Cost-effective: Aftermarket parts are generally more affordable compared to OEM (Original Equipment Manufacturer) parts. Buying an aftermarket thermostat coolant housing can save you a significant amount of money.

2. Availability: Aftermarket parts are often more readily available than OEM parts. You can find them at various auto parts stores or online retailers, making it easier to get the part you need when you need it.

3. Variety of options: Aftermarket parts come from various manufacturers, giving you a wider range of choices. You can choose a part based on factors such as price, quality, and brand reputation.

4. Customization: Aftermarket parts often offer more customization options than OEM parts. For example, some aftermarket thermostat coolant housings may be designed with improved materials or unique features that can enhance your vehicle's performance.

1. Quality concerns: Not all aftermarket parts are created equal. Some may be of lower quality compared to OEM parts, which can lead to potential issues down the line.

2. Fitment issues: While most aftermarket parts are designed to fit various makes and models, there is always a risk of fitment issues. In the case of the Audi 03-05 B5 S4 Allroad and C5 A6 2.7T thermostat coolant housing, it is essential to ensure that the aftermarket part you choose is compatible with your specific vehicle.

3. Warranty: OEM parts usually come with a manufacturer's warranty, providing peace of mind and protection against potential defects. Aftermarket parts, on the other hand, may not come with a warranty, or the warranty may not be as comprehensive.

4. Lack of OEM fit and finish: Aftermarket parts may not have the same fit and finish as OEM parts. This can affect the appearance of your vehicle and, in some cases, impact its performance.

When considering buying an aftermarket Audi 03-05 B5 S4 Allroad/C5 A6 2.7T thermostat coolant housing, it is essential to weigh the pros and cons carefully. While aftermarket parts offer cost savings and a wider range of options, they also come with potential quality concerns, fitment issues, and a lack of a comprehensive warranty. Ultimately, it is crucial to choose a reputable aftermarket parts manufacturer and ensure that the part you choose is compatible with your specific vehicle. With proper research and due diligence, you can find a high-quality aftermarket thermostat coolant housing that meets your performance and budget needs.

If you are in the market for a new thermostat coolant housing for your Audi 03-05 B5 S4 Allroad or C5 A6 2.7T, consider researching well-known aftermarket parts manufacturers such as Genuine Audi Parts, Mahle, or OEM Tools. Look for parts with positive customer reviews, compatibility with your specific vehicle, and a reasonable price. Ensure that the part comes with a warranty, and consider purchasing from a trusted auto parts retailer to guarantee authenticity and quality.

Details:

Removed from a 2002 Audi S4 with 120k miles. There are a few small scrapes in the ring surrounding thermostat as pictured. There are no major cracks or damaged throughout the housing and it did not leak prior to removal. In great condition overall with no major damage and little to cosmetic.

All of the mounting holes and tabs are in good shape as well ports/outlet's. 2000 2001 2002 Audi B5 S4 01 02 03 04 05 Allroad C5 A6 Plastic Thermostat Housing Assembly OEM. Mounting hardware is not included.

part #: 078121121k prices

• $38.49-$80.99

specifications theostapa:

• for models: B5, S4, C5, A6, Allroad
• for makes: Audi
• for years: 2000-2005
• mpn: 078121121k
• mounting style: Bolt-on
• type: Thermostat Housing
• fitment type: Direct Replacement
• material: Plastic
• features: Oem Part
• country of origin: Germany

shipping theostapa:

• service: UPS Ground, USPS Priority Mail
• carrier: UPS, USPS
• transit: 4-9 Days
• type: Fixed
• class: Standard, Expedited
• cost: $0.00

offer theostapa:

• options: Ship-to-home
• sold: 0
• started: December 30, 2025
• availability: In Stock
• quantity: 1
• best offers: True

seller theostapa:

• # reviews: 104
• rating: 100.0%
• city: Turners Falls, Massachusetts

returns theostapa:

• policy: Returns Accepted
• paid by: Buyer
• time: 30 Days

payments theostapa:

• other
• credit card: Visa
• wallet: Paypal

general theostapa:

• condition: Used
• Car Truck Parts Accessories > Engine Cooling Components > Thermostats Housings

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