Audi A4 Thermostat Housings & Filler Necks
- Dorman®Engine Coolant Thermostat HousingEngine Coolant Thermostat Housing by Dorman®. Re-engineered to address common failure points in the original equipment, Dorman’s Engine Coolant Thermostat Housing has improved durability and resistance. It withstands the extreme...Ideal replacement - this engine coolant thermostat housing directly replaces the original housing on specified vehicle years, makes and modelsDurable construction - this part is specifically designed to withstand extreme temperature changes and resist cracking and leaking$2.20 - $634.86
- Four Seasons®Engine Coolant Thermostat HousingEngine Coolant Thermostat Housing by Four Seasons®. All products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of car parts experience, fix it once and fix it right with Four Seasons.OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$19.61 - $245.38
- Four Seasons®Engine Coolant Water OutletEngine Coolant Water Outlet by Four Seasons®. All products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of car parts experience, fix it once and fix it right with Four Seasons.OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$4.82 - $158.47
- Gates®Engine Coolant Water OutletEngine Coolant Water Outlet by Gates®. If you want to keep your vehicle safe on the road for many years to come, go with this Gates product. Developed with the utmost attention to detail and manufactured from the highest quality...Advanced weld process guarantees consistent, long-lasting performanceTop quality materials and improved seal design provide leak-free service$7.22 - $225.64
- Dorman®Engine Coolant Water OutletEngine Coolant Water Outlet by Dorman®. Re-engineered to address common failure points in the original equipment, Dorman’s Engine Coolant Filler Neck has improved durability and resistance. It withstands the extreme changes in...Direct replacement for a proper fit every timeHoses slide on for easy installation$2.47 - $88.10
- Genuine®Engine Coolant Thermostat HousingEngine Coolant Thermostat Housing by Genuine®. If your engine cooling system is in need of repair, don’t compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts chain...Designed to restore your vehicle’s engine cooling systemGenuine OE replacement parts from the OE manufacturer$13.97 - $790.77
- Fel-Pro®Engine Coolant Thermostat Housing GasketEngine Coolant Thermostat Housing Gasket by Fel-Pro®. If you need durable gaskets to prevent leaks on your vehicle, Fel-Pro is the way to go. Engineered using the latest technologies and global engineering resources, the gaskets meet...Direct OEM replacement for a proper fitEnsures reliable sealing performance$0.79 - $21.08
- MotoRad®Coolant Thermostat HousingCoolant Thermostat Housing by MotoRad®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating$4.40 - $727.60
- Genuine®Thermostat Housing CoverThermostat Housing Cover by Genuine®. If your engine cooling system is in need of repair, don’t compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts chain store. On our...Designed to restore your vehicle’s engine cooling systemGenuine OE replacement parts from the OE manufacturer$9.83 - $318.42
- MotoRad®Engine Coolant Thermostat SealEngine Coolant Thermostat Seal by MotoRad®. MotoRad seals and gaskets are made from high quality materials suitable for resistance to high temperatures and engine coolant to maintain a superior, long lasting seal.Made of High quality materialsResistance to high tempertures$0.44 - $3.93
- gpd®Engine Coolant Water OutletEngine Coolant Water Outlet by gpd®. Heater cores transfer heat from the engine's cooling system to the inside of the vehicle. Thermostat housing and water outlets are connections that transfer coolant between the radiator and the...Designed to meet/exceed OE fit, form and functionDurability tested on every new design$2.44 - $276.37
- Mahle®Engine Coolant Outlet GasketEngine Coolant Outlet Gasket by Mahle®. Keep your cooling system running leak-free, with superior-grade Mahle seals and gaskets designed to provide OE form, fit, and function. Made using advanced technology and the finest materials,...Designed to seal your cooling system from leaksMade from high-quality materials for utmost reliability$0.08 - $13.79
- MotoRad®Engine Coolant Water OutletEngine Coolant Water Outlet by MotoRad®. MotoRad seals and gaskets are made from high quality materials suitable for resistance to high temperatures and engine coolant to maintain a superior, long lasting seal.Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating$1.67 - $170.18
- Stant®Engine Coolant Thermostat SealEngine Coolant Thermostat Seal by Stant®. Cut installation time by as much as 50% with Stat Lok® adhesive backed thermostat seals. They'll hold the thermostat in place, leaving your hands free to secure the outlet. Stant rubber...Quality construction ensures exact fit and prolonged service life.Stainless steel bridge with channel-design for strength and rigidity.$0.47 - $8.64
- SKP®Engine Coolant Thermostat HousingEngine Coolant Thermostat Housing by SKP®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...High quality at an affordable priceExpertly made from premium materials$3.64 - $242.43
- Gates®Engine Coolant Thermostat SealEngine Coolant Thermostat Seal by Gates®. If you want to keep your vehicle safe on the road for many years to come, go with this Gates product. Developed with the utmost attention to detail and manufactured from the highest quality...Great design and functionMade from sturdy materials$0.29 - $13.40
- iD Select®Engine Coolant Thermostat Housing GasketEngine Coolant Thermostat Housing Gasket by iD Select®.Direct OEM replacement for your malfunctioning partMade to deliver the ultimate in quality, reliability, and value$0.63 - $1.77
- Mahle®Engine Coolant Thermostat Housing GasketEngine Coolant Thermostat Housing Gasket by Mahle®. Keep your cooling system running leak-free, with superior-grade Mahle seals and gaskets designed to provide OE form, fit, and function. Made using advanced technology and the finest...Designed to seal your cooling system from leaksMade from high-quality materials for utmost reliability$0.17 - $16.98
- Four Seasons®Engine Coolant Water InletEngine Coolant Water Inlet by Four Seasons®. All products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of car parts experience, fix it once and fix it right with Four Seasons.OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$7.50 - $86.51
- MotoRad®Thermostat GasketThermostat Gasket by MotoRad®. MotoRad seals and gaskets are made from high quality materials suitable for resistance to high temperatures and engine coolant to maintain a superior, long lasting seal.Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating$0.63 - $1.96
- Fel-Pro®Engine Coolant Outlet GasketEngine Coolant Outlet Gasket by Fel-Pro®. If you need durable gaskets to prevent leaks on your vehicle, Fel-Pro is the way to go. Engineered using the latest technologies and global engineering resources, the gaskets meet specific OEM...Quality that you can trustValidated for fit, form and function$0.59 - $30.29
- URO Parts®Engine Coolant Thermostat HousingEngine Coolant Thermostat Housing by URO Parts®. This superior part by URO is a great alternative solution to the costly factory equipment that will help you restore smooth and efficient operation of your vehicle. Thoroughly designed...Designed to replace your worn out factory cooling partOptimizes engine cooling performance$2.36 - $115.16
- SKP®Engine Coolant Water OutletEngine Coolant Water Outlet by SKP®. Quantity: 1 Piece. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...Precise engineering ensures second to none quality and lasting valueStringently tested with the highest quality standards$1.44 - $57.02
- Genuine®Thermostat O-RingThermostat O-Ring by Genuine®. Has your temperature gauge needle been creeping up? Are you seeing green puddles on the ground under your vehicle? If so, you may need cooling system repairs, which should not be put off, because...Designed to restore your vehicle’s engine cooling systemGenuine OE replacement parts from the OE manufacturer$4.11 - $20.76
- Gates®Engine Coolant Outlet GasketEngine Coolant Outlet Gasket by Gates®. If you want to keep your vehicle safe on the road for many years to come, go with this Gates product. Developed with the utmost attention to detail and manufactured from the highest quality...Great design and functionMade from sturdy materials$1.18 - $4.51
- Dorman®OE Solutions™ Engine Coolant Water OutletOE Solutions™ Engine Coolant Water Outlet by Dorman®. This replacement engine coolant water outlet is engineered to match the fit and durability of the stock engine coolant water outlet on specified vehicles. It is designed to...Direct replacement for a proper fit every timeConstructed from high-quality materials for long-lasting durability$31.93 - $77.44
- Beck Arnley®Engine Coolant Thermostat GasketEngine Coolant Thermostat Gasket by Beck Arnley®. When investing in this superior product by Beck Arnley, expect to get the exact OEM look, function, and fit. The product was developed to stringent factory specifications and crafted...Rubber or Graphite impregnated for extreme temperature resistanceWire reinforced for radial strength and the Micro sealing provides a positive seal$0.87 - $6.39
- Vaico®Engine Coolant Thermostat HousingEngine Coolant Thermostat Housing by Vaico®. Keep your vehicle's heart under the hood running in tip-top condition with this premium Vaico engine cooling product. It's designed to help your engine work in a reliable and efficiency...Sensible alternative to your OEM engine cooling partDesigned to keep your engine operating at proper temperatures$2.40 - $36.68
- iD Select®Engine Coolant Thermostat HousingEngine Coolant Thermostat Housing by iD Select®. Swap out your worn-out or malfunctioning part with this top-notch product from iD Select. It’s built to OEM specifications to offer the same fit, form, and function as your factory...Direct OEM replacement for your malfunctioning partMade to deliver the ultimate in quality, reliability, and value$6.46 - $720.14
- iD Select®Engine Coolant Thermostat Housing AssemblyEngine Coolant Thermostat Housing Assembly by iD Select®. Swap out your worn-out or malfunctioning part with this top-notch product from iD Select. It’s built to OEM specifications to offer the same fit, form, and function as your...Direct OEM replacement for your malfunctioning partMade to deliver the ultimate in quality, reliability, and value$11.93 - $469.27
Shop By Service Type
Since its introduction in 1994 (1996 in the U.S. market), the Audi A4 has represented a reference point for many buyers looking for a refined, powerful, and stylish compact luxury car. The Audi A4 carries the reliability traditional for the German automaker, which makes the vehicle robust and efficient. The outstanding cooling system plays a vital role in keeping the vehicle reliable. Besides the radiator and thermostat, the filler neck and thermostat housing are integral parts of the cooling system. They are needed for regulating the flow of the coolant to and from the radiator to keep the engine at the optimal working temperature, no matter whether you are stuck in a traffic jam or driving fast out on a highway.
A typical thermostat is located between the engine and radiator. A small cylinder within the thermostat contains a wax component which melts when the engine reaches a set temperature opening a valve and allowing the coolant to flow into the radiator through the filler neck. Most modern housings feature an integrated design and act as a coolant outlet. Visit our online store for a large selection of top-quality Audi A4 thermostat housing and filler necks exquisitely designed by some of the most trustworthy brands in the aftermarket and solidly built to deliver trouble-free operation for years to come.