1998 Audi A4 Engine Cooling Parts

Keep Your 1998 Audi A4 in Top Shape with Quality Engine Cooling Parts

Whether you’re repairing or upgrading your Engine Cooling Part, using high-quality parts is key to keeping your 1998 Audi A4 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Coolant Reservoirs, Thermostats, and Radiators. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Engine Cooling Parts from Trusted Brands

Looking for a reliable Engine Cooling Part? We’ve got you covered with options from brands you know and trust like Carquest Premium, Mahle, and Beck/Arnley. For example, Carquest Premium Engine Cooling Parts start at just $13.99 with an average 4.4 star rating. Mahle and Beck/Arnley offer similar pricing and quality, backed by strong customer feedback. With over 98 reviews and a solid 4 star average, you can shop with confidence knowing other Audi A4 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1998 Audi A4 Engine Cooling Part at Advance Auto Parts is around $64.71, with a range that starts at $2.49 and goes up to $338.99. With 41 options in stock from 10 trusted brands, finding the right fit is easy. Popular picks like Multi-Purpose O-Ring, UltraStat Thermostat: 192 Degrees, and Pressurized Coolant Reservoir: White, Plastic, Original Equipment Replacement start at just $2.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Engine Cooling Part, don’t forget to check out other key components like Blend Doors and Blower Motor and Related Products. At Advance Auto Parts, we’re here to help you keep your 1998 Audi A4 in peak condition, inside and out.

Essential 1998 Audi A4 Engine Cooling Parts

MAHLE Original – Engine Coolant Thermostat Housing Gasket (Part No.C31633)

Engine Coolant Thermostat Housing Gasket

from

$2.49
MAHLE® gaskets provide world class sealing products trusted by OEMs & Technicians around the globe.

Product Features:
  • All MAHLE gaskets meet or exceed the original equipment specifications providing the finest sealing products available
  • MAHLE gaskets utilizes OE equivalent or better materials in all our gaskets
  • MAHLE gaskets is the leader in Domestic, Asian and European applications
  • The contents of MAHLE gaskets are packaged in shrink wrapped tray, giving you the added security of knowing that you have the right parts, prior to opening the package
See More

Dorman – Radiator Fan Assembly: Dual, Cost Effective and Reliable (Part No.620-839)

Radiator Fan Assembly: Dual, Cost Effective and Reliable

from

$301.99
This engine cooling fan assembly is precision-engineered to match the fit and performance of the stock radiator fan on specific vehicle years, makes and models. It has been rigorously tested to ensure it cools as effectively as the original part.

Product Features:
  • Ideal replacement – this engine cooling fan assembly was precision-engineered to match the fit and performance of the stock radiator fan assembly on specific vehicles
  • Complete package – assembly is designed with the same materials and components as the original part
  • Quality assured – motors are tested in laboratory settings to ensure performance
  • Cost effective and reliable – trustworthy manufacturing for far less than same part at the dealership
See More

Carquest Premium – Thermostat Kit: Gasket Included (Part No.85960)

Thermostat Kit: Gasket Included

from

$151.99
We are proud to offer this Carquest product line: Carquest Water Outlets. Our products are engineered and tested to provide years of trouble free operation and designed to be hassle free OE replacement part that meets and/or exceeds OE standards. Backed by over 50 years of mobile temperature control experience, fix it once and fix it right with CARQUST Water Outlets and Thermostat Housings.

Product Features:
  • Meets and/or exceeds OEM standard
  • Includes quality gasket or O-ring to ensure proper seal (where applicable))
  • 100% virgin resin material to insure durability
  • 100% leak tested
  • Direct-fit replacement for ease of installation
  • Includes quality thermostat
  • Meets and/or exceeds OEM standard
  • Includes quality gasket or O-ring to ensure proper seal (where applicable)
  • 100% virgin resin material to insure durability
  • 100% leak tested
  • Direct-fit replacement for ease of installation
See More

Felpro – Multi-Purpose O-Ring (Part No.25598)

Multi-Purpose O-Ring

from

$2.99
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific, providing unsurpassed quality for a seal you can trust
  • Validated for fit, form, and function
  • Engineered for the sealing repair environment
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
See More

Carquest Premium – Standard Reservoir Cap: 20 PSI (Part No.10249)

Standard Reservoir Cap: 20 PSI

from

$13.99
Crafted to meet the exact specifications set by Original Equipment Manufacturers (OEM), these products are engineered for effortless installation and removal. Constructed from premium-grade components, incorporating proper relief and vacuum valves, they ensure optimal performance even in the most demanding automotive cooling systems. Rigorously quality-tested, these components provide exceptional, out-of-the-box performance and superior durability to meet or exceed the highest standards of today’s vehicles.

Product Features:
  • Maintains proper cooling system pressure
  • Easy installation and removal
  • 100% tested to ensure proper pressure and longevity
  • Meets all OEM specifications
See More

Factory Air – Engine Coolant Flange (Part No.85685)

Engine Coolant Flange

from

$8.79
Meets And/or exceeds OEM stAndard; Includes quality gasket or O-ring to ensure proper seal (where applicable; 100% virgin resin material to insure durability; 100% leak tested; Direct-fit replacement for ease of installation
See More

Victor Reinz – Engine Water Pump Gasket (Part No.71-15988-00)

Engine Water Pump Gasket

from

$15.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.

Product Features:
  • Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
See More

Carquest Premium – Multi-Purpose Relay (Part No.RAC2066)

Multi-Purpose Relay

from

$338.99
Relays are electrical switches used to convert a small electrical load into a circuit capable of handling a high amperage load. Computers and small switches are not designed to carry the higher amperage requirement of a circuit that may have an electric motor, solenoid, or high amperage lighting fixture. Within a relay are contacts that are controlled with electromagnetism, when the circuit switch commands the device on or off, magnetism will pull or release the contact arm closing or opening the contacts within the relay that carry the voltage.

Product Features:
  • Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
  • Computer-Aided Design (CAD), laser scanning and 3D printing – utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) – in the part design process ensures speed-to-market and a precise fit guaranteed.
  • Where applicable, robust circuit board design increases durability due to heat, shock, and random electro-magnetic pulses (EMP) and power spikes.
  • Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
  • 100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
  • 100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
See More

Carquest Premium – Thermostat (Part No.48049)

Thermostat

from

$32.49
Original equipment design provides exact fit and performance.

Product Features:
  • Precise fitting sealing edges prevent leakage and premature cooling.
  • Self-cleaning and self-aligning thermostat valve.
  • Stainless steel assembly and springs are engineered for long life and smooth performance.
See More

Rein – Temperature Sensor Kit (Part No.ELC0051P)

Temperature Sensor Kit

from

$20.99
Electrical parts control all aspects of vehicles on the road today. Replacing these components when they are starting to fail will ensure your vehicle has maximum performance and fuel economy. This is why Rein Automotive electrical parts are application specific and match the design and function of the OE parts.

Product Features:
  • Tested to ensure maximum performance
  • Manufactured to strict engineering standards/specifications in materials and tolerances
  • Long life and durability
  • Made by the OE manufacturer
See More

URO Parts – Auxiliary Fan Switch (Part No.8D0959481B)

Auxiliary Fan Switch

from

$12.99
URO Parts has been a leading brand of replacement auto parts for European vehicles for more than thirty years. Affordable yet dedicated to quality, URO Parts controls its production process in strict accordance with ISO/TS 16949 QMS specifications and offers a wide variety of components used to restore or repair engine, electrical, drive train, braking, steering, suspension, climate control, cooling, exhaust, and fuel systems in classic to late-model German, British, and Scandinavian vehicles. Looking for parts that are even higher quality than original equipment? URO Parts engineers analyze common failures and identify weaknesses in original equipment parts when creating URO Premium components, which are superior to OE in performance and reliability thanks to improved materials and more robust designs. Thanks to high-quality, competitively-priced URO Parts and bulletproof URO Premium replacement components, owning a prestigious European vehicle is no longer an expensive luxury reserved for the elite and wealthy.

Product Features:
  • Guaranteed fitment
  • Direct-fit OE replacement design restores factory cooling fan switch function
  • Easy plug-and-play connection
  • Manufactured using high-quality materials to withstand intense engine compartment and cooling system heat
  • Alloy conductors minimize electrical resistance for accurate operation
  • Designed and tested for reliability and long life
See More

Dorman – Pressurized Coolant Reservoir: White, Plastic, Original Equipment Replacement (Part No.603-703)

Pressurized Coolant Reservoir: White, Plastic, Original Equipment Replacement

from

$51.99
This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit and function of the original part.

Product Features:
  • Direct replacement – this engine coolant reservoir matches the fit and function of the original part
  • Ideal solution – engineered for a seamless installation
  • Durable construction – manufactured from quality materials to withstand underhood heat and vibration
  • Trustworthy design – backed by 100 years of automotive aftermarket experience
See More

Carquest Premium – Universal Fan Clutch – 5" Thermal Import/Compact (Part No.215068)

Universal Fan Clutch - 5" Thermal Import/Compact

from

$161.99
Product Features:
  • Designed, tested, and built by application
  • OE performance, fit, and appearance
  • Precision machined
  • Out of box installation
See More

Carquest Premium – Universal Fan Clutch – 5" Thermal Import/Compact (Part No.215069)

Universal Fan Clutch - 5" Thermal Import/Compact

from

$175.99
Product Features:
  • Designed, tested, and built by application
  • OE performance, fit, and appearance
  • Precision machined
  • Out of box installation
See More

Rein – Auxiliary Water Pump (Part No.WPA0033)

Auxiliary Water Pump

from

$151.99
Rein Automotive OE quality auxiliary water pumps are fabricated from original casting specifications to ensure proper fit for easy installation, proper water flow and maximum cooling. Auxiliary water pump use high-quality plastic or metal construction to ensure durability and long service life. Our auxiliary water pumps aim to provide the professional repair technician and vehicle owner the peace of mind and trust that is expected from an OE quality component.

Product Features:
  • High-quality plastic or metal construction
  • Flow-rates matched to OE flow-rates
  • Includes the vibration isolators, mounting brackets and hardware where applicable for easy installation
See More

Carquest Premium – New Auxiliary Water Pump (Part No.T1375)

New Auxiliary Water Pump

from

$433.99
This new pump is 100% tested to ensure the highest quality. Each unit is built to meet or exceed all OE specifications and is validated for fit, form, and function. Application specific design to ensure a perfect fit and correct operation for unsurpassed quality.

Product Features:
  • Electric water pump
  • Specialized for vehicles using supplemented cooling for the engine or components
  • Plastic housing
  • All components necessary for installation are supplied with pump
  • Follow all enclosed instructions to maximize pump life and validate warranty
See More

Carquest Premium – Coolant Housing/Water Outlet (Part No.85182)

Coolant Housing/Water Outlet

from

$23.79
We are proud to offer this Carquest product line: Carquest Water Outlets. Our products are engineered and tested to provide years of trouble free operation and designed to be hassle free OE replacement part that meets and/or exceeds OE standards. Backed by over 50 years of mobile temperature control experience, fix it once and fix it right with CARQUST Water Outlets and Thermostat Housings.

Product Features:
  • Meets and/or exceeds OEM standard
  • Direct-fit replacement for ease of installation
  • 100% leak tested
  • Meets and/or exceeds OEM standard
  • 100% leak tested
  • Direct-fit replacement for ease of installation
See More

Victor Reinz – Engine Coolant Thermostat Housing Seal (Part No.41-76137-00)

Engine Coolant Thermostat Housing Seal

from

$7.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.

Product Features:
  • Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
See More

Felpro – Engine Coolant Thermostat Housing Seal (Part No.35924)

Engine Coolant Thermostat Housing Seal

from

$3.99
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Engineered and manufactured specifically for the repair environment
  • Unsurpassed quality you can trust
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
See More

Dorman – Coolant Housing/Water Outlet: with Housing (Part No.902-5866)

Coolant Housing/Water Outlet: with Housing

from

$58.99
This replacement engine coolant thermostat housing is engineered to match the fit and durability of the stock thermostat housing on specified vehicles. It is designed to withstand extreme temperature changes to extend service life.

Product Features:
  • Ideal replacement – this engine coolant thermostat housing directly replaces the original housing on specified vehicle years, makes and models
  • Durable construction – this part is specifically designed to withstand extreme temperature changes and resist cracking and leaking
  • Cost-effective and reliable – offers original manufacturer quality at lower cost than getting replacement at dealer
  • Industry-leading design – professionally engineered by the aftermarket leader in replacement thermostat housings
See More

Carquest Premium – Thermostat Housing with Thermostat (Part No.85963)

Thermostat Housing with Thermostat

from

$112.99
High quality OE replacement part with all components needed to complete the job.

Product Features:
  • Meets and/or exceeds OEM standard
  • Includes quality gasket or O-ring  to ensure proper seal (where applicable)
  • Includes quality gasket or O-ringá to ensure proper seal (where applicable)
  • 100% virgin resin material to insure durability
  • 100% leak tested
  • Direct-fit replacement for ease of installation
  • Includes quality thermostat
  • Meets and/or exceeds OEM standard
  • Includes quality gasket or O-ring to ensure proper seal (where applicable)
  • 100% virgin resin material to insure durability
  • 100% leak tested
  • Direct-fit replacement for ease of installation
See More

Carquest Premium – Radiator: With Transmission Oil Cooler (Part No.813188)

Radiator: With Transmission Oil Cooler

from

$276.99
Carquest Premium radiators are designed and engineered for maximum performance, using the highest-grade materials to ensure all radiators meet or exceed original equipment (O.E.) fit, form and function. Carquest Premium radiators are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Most modern vehicles use radiators with plastic tanks and our parts are engineered with integrated ribbing to prevent damage during thermal cycling. Carquest Premium radiators are also 100% tested to ensure a durable, leak-free cooling system repair.

Product Features:
  • Thermal tested under real-life temperature simulations
  • High tensile strength aluminum for maximum crimp strength
  • Plastic tanks are engineeredáwith integrated ribbingáfor addedástrength to withstand cracks, bowing and distortion during thermal cycles
  • Thermal expansion slots extend core life and reduce failure rates by allowing improved core expansion and contraction during systematic heat cycles
See More

KAI – Radiator (Part No.RAD13188)

Radiator

from

$186.99
New Platinum Pro Radiator, 2.0 Liter Engine With Built-In Transmission Oil Cooler

Product Features:
  • 2.0 Liter Engine With Built-In Transmission Oil Cooler, Made Of Plastic and Aluminum
  • Meets All Federal Motor Safety Standards
  • No Drilling Needed For Installation
  • No Modifications Needed For Installation
  • Direct Fit Replacement For Your Vehicle
  • Same Form Fit And Function As OE
  • Radiator Cap Not Included
  • Check Out The Large Selection Of Parts Available For Your Vehicle
See More

Felpro – Engine Coolant Thermostat Housing Seal (Part No.35705)

Engine Coolant Thermostat Housing Seal

from

$3.29
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Engineered and manufactured specifically for the repair environment
  • Unsurpassed quality you can trust
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
See More

Felpro – Multi-Purpose O-Ring (Part No.25589)

Multi-Purpose O-Ring

from

$3.99
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design
  • Manufactured for the sealing repair environment
  • Validated for fit, form, and function
  • Quality that you can trust
See More

Felpro – Multi-Purpose O-Ring (Part No.35763)

Multi-Purpose O-Ring

from

$4.49
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Engineered and manufactured specifically for the repair environment
  • Unsurpassed quality you can trust
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
See More

Most Popular Coolant Reservoir for 1998 Audi A4s

Enhance your 1998 Audi A4 with this popular Coolant Reservoir we have in stock, for $51.99.

Dorman – Pressurized Coolant Reservoir: White, Plastic, Original Equipment Replacement (Part No.603-703)

Pressurized Coolant Reservoir: White, Plastic, Original Equipment Replacement

from

$51.99
This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit and function of the original part.

Product Features:
  • Direct replacement – this engine coolant reservoir matches the fit and function of the original part
  • Ideal solution – engineered for a seamless installation
  • Durable construction – manufactured from quality materials to withstand underhood heat and vibration
  • Trustworthy design – backed by 100 years of automotive aftermarket experience
See More

Best-Selling 1998 Audi A4 Thermostats

Upgrade your A4 with one of our 7 best-selling Thermostats, earning an average 4.75 stars rating across 14 reviews.

Motorad UltraStats – UltraStat Thermostat: 192 Degrees (Part No.5475-190)

UltraStat Thermostat: 192 Degrees

from

$22.99
This premium upgraded thermostat is everything you were looking for. UltraStat Thermostats are the toughest thermostats on the market. All heavy gauge stainless steel construction provides long-life durability, as well as complete corrosion resistance. Exclusive BLVT Valve technology minimizes thermal shock to cooling system components. This is the perfect upgrade to help insure your cooling system is working exactly as you need and expect it to for longevity.

Product Features:
  • Exclusive BLVT Valve Technology minimizes thermal shock to cooling system components
  • Heavy gauge stainless steel components offer increased reliability and long-lasting durability
  • Stainless steel thermal element for unmatched corrosion resistance and revolutionary REAX wax mixture provides quicker reaction time
  • AccuSpring Design for stable temperature control and increased cabin comfort
See More

Carquest Premium – Standard Thermostat: 190 Degrees (Part No.14419)

Standard Thermostat: 190 Degrees

from

$17.29
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:
  • High grade stainless steel and copper construction
  • Meets or exceeds OEM standards
  • Consistent and precise response to cooling system needs
  • Original equipment design for worry-free direct fit replacement
  • 100% tested and calibrated
See More

Motorad – Standard Thermostat: 180 Degrees (Part No.304-180)

Standard Thermostat: 180 Degrees

from

$25.99
Manufactured with OEM quality materials and safety standards by an OE Supplier. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:
  • High grade stainless steel and copper construction
  • Meets or exceeds OEM standards
  • Consistent and precise response to cooling system needs
  • Original equipment design for worry-free direct fit replacement
  • 100% tested and calibrated
See More

Carquest Premium – Standard Thermostat: 198 Degrees (Part No.14099)

Standard Thermostat: 198 Degrees

from

$17.99
Carquest Premium Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This thermostat will meet and exceed the expectations of the OE thermostat to insure the best product for your cooling system. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:
  • High grade stainless steel and copper construction
  • Meets or exceeds OEM standards
  • Consistent and precise response to cooling system needs
  • Original equipment design for worry-free direct fit replacement
  • 100% tested and calibrated
See More

Motorad – Standard Thermostat: 170 Degrees (Part No.304-170)

Standard Thermostat: 170 Degrees

from

$22.99
Manufactured with OEM quality materials and safety standards by an OE Supplier. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Offset design, air relief valve, and OEM style seals included where applicable.

Product Features:
  • High grade stainless steel and copper construction
  • Meets or exceeds OEM standards
  • Consistent and precise response to cooling system needs
  • Original equipment design for worry-free direct fit replacement
  • 100% tested and calibrated
See More

Rein – Thermostat Insert 87C (Part No.CTI0006)

Thermostat Insert 87C

from

$16.99
Rein Automotive OE quality thermostat inserts install, fit and perform the way the original manufacturer intended. This ensures a smooth and easy installation, just as one would expect to find with OE quality. These inserts are designed to meet or exceed the OE materials used. Rein thermostats are produced with high-quality metals and components to ensure proper durability and service life. The thermostats are temperature calibrated to have a consistent and precise response suiting cooling system needs. Our quality thermostat inserts aim to provide the profession repair technician and vehicle owner peace of mind and trust that is expected from an OE quality component.

Product Features:
  • Matches original equipment design specifications
  • All gaskets or seals necessary for installation are supplied with thermostats
  • Manufactured to strict engineering standards/specifications in materials and tolerances
  • Thermostat set to 87 degrees Celsius to maintain optimal running temperature
See More

Carquest Premium – Thermostat (Part No.48049)

Thermostat

from

$32.49
Original equipment design provides exact fit and performance.

Product Features:
  • Precise fitting sealing edges prevent leakage and premature cooling.
  • Self-cleaning and self-aligning thermostat valve.
  • Stainless steel assembly and springs are engineered for long life and smooth performance.
See More

Top-Quality Radiators for 1998 Audi A4s

Choose a high-quality OEM or aftermarket Radiator for Audi A4s and enjoy top-notch performance from $161.99.

Carquest Premium – Radiator: With Transmission Oil Cooler (Part No.432554)

Radiator: With Transmission Oil Cooler

from

$216.99
Carquest Premium radiators are designed and engineered for maximum performance, using the highest-grade materials to ensure all radiators meet or exceed original equipment (O.E.) fit, form and function. Carquest Premium radiators are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Most modern vehicles use radiators with plastic tanks and our parts are engineered with integrated ribbing to prevent damage during thermal cycling. Carquest Premium radiators are also 100% tested to ensure a durable, leak-free cooling system repair.

Product Features:
  • Thermal tested under real-life temperature simulations
  • High tensile strength aluminum for maximum crimp strength
  • Plastic tanks are engineeredáwith integrated ribbingáfor addedástrength to withstand cracks, bowing and distortion during thermal cycles
  • Thermal expansion slots extend core life and reduce failure rates by allowing improved core expansion and contraction during systematic heat cycles
See More

Carquest Premium – Radiator: With Transmission Oil Cooler (Part No.432598)

Radiator: With Transmission Oil Cooler

from

$185.99
Carquest Premium radiators are designed and engineered for maximum performance, using the highest-grade materials to ensure all radiators meet or exceed original equipment (O.E.) fit, form and function. Carquest Premium radiators are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Most modern vehicles use radiators with plastic tanks and our parts are engineered with integrated ribbing to prevent damage during thermal cycling. Carquest Premium radiators are also 100% tested to ensure a durable, leak-free cooling system repair.

Product Features:
  • Thermal tested under real-life temperature simulations
  • High tensile strength aluminum for maximum crimp strength
  • Plastic tanks are engineeredáwith integrated ribbingáfor addedástrength to withstand cracks, bowing and distortion during thermal cycles
  • Thermal expansion slots extend core life and reduce failure rates by allowing improved core expansion and contraction during systematic heat cycles
See More

Carquest Premium – Radiator (Part No.412192)

Radiator

from

$161.99
Carquest Premium radiators are designed and engineered for maximum performance, using the highest-grade materials to ensure all radiators meet or exceed original equipment (O.E.) fit, form and function. Carquest Premium radiators are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Most modern vehicles use radiators with plastic tanks and our parts are engineered with integrated ribbing to prevent damage during thermal cycling. Carquest Premium radiators are also 100% tested to ensure a durable, leak-free cooling system repair.

Product Features:
  • Thermal tested under real-life temperature simulations
  • High tensile strength aluminum for maximum crimp strength
  • Plastic tanks are engineeredáwith integrated ribbingáfor addedástrength to withstand cracks, bowing and distortion during thermal cycles
  • Thermal expansion slots extend core life and reduce failure rates by allowing improved core expansion and contraction during systematic heat cycles
See More

Top Picks for 1998 Audi A4 Coolant Reservoir Caps

Invest in one of our 2 durable Coolant Reservoir Caps for your 1998 Audi, knowing you’re getting trusted brands and expert craftsmanship.

Carquest Premium – Standard Reservoir Cap: 20 PSI (Part No.10249)

Standard Reservoir Cap: 20 PSI

from

$13.99
Crafted to meet the exact specifications set by Original Equipment Manufacturers (OEM), these products are engineered for effortless installation and removal. Constructed from premium-grade components, incorporating proper relief and vacuum valves, they ensure optimal performance even in the most demanding automotive cooling systems. Rigorously quality-tested, these components provide exceptional, out-of-the-box performance and superior durability to meet or exceed the highest standards of today’s vehicles.

Product Features:
  • Maintains proper cooling system pressure
  • Easy installation and removal
  • 100% tested to ensure proper pressure and longevity
  • Meets all OEM specifications
See More

Dorman – Help – Coolant Reservoir Cap (Part No.54016)

Coolant Reservoir Cap

from

$13.99
Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap.

Product Features:
  • Direct replacement – this engine coolant reservoir cap directly replaces a cracked or lost original cap
  • Application specific – made to match dimensions of reservoir cap on only certain vehicle years, makes and models
  • Seamless fit – reverse-engineered from the original equipment to fit perfectly
  • Excellent value – a quick, easy replacement that’s less expensive than going back to the dealership
See More

Water Pump Gaskets for 1998 Audi A4s

Make a smart move for your 1998 Audi A4 with products all priced from $5.29 to $17.29.

Felpro – Engine Water Pump Gasket (Part No.35549)

Engine Water Pump Gasket

from

$17.29
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design
  • Manufactured for the sealing repair environment
  • Validated for fit, form, and function
  • Quality that you can trust
See More

Victor Reinz – Engine Water Pump Gasket (Part No.71-15988-00)

Engine Water Pump Gasket

from

$15.99
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.

Product Features:
  • Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
See More

Victor Reinz – Engine Water Pump Gasket (Part No.71-31717-10)

Engine Water Pump Gasket

from

$5.29
With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.

Product Features:
  • Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
See More

Top-Rated Engine Cooling Part Brands For Your 1998 Audi A4

When it comes to finding the perfect Engine Cooling Part for your 1998 Audi A4, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 10 trusted brands. We carry the most popular Engine Cooling Part brands including Carquest Premium, Mahle, and Beck/Arnley, and more, all known for their exceptional customer ratings (average brand rating of 4.4 stars) and competitive prices, as low as $2.49. Purchasing a Engine Cooling Part from us here at Advance Auto Parts is a smart move for both you and your 1998 Audi A4, providing peace of mind with parts that meet or exceed OEM standards.

Popular Carquest Premium 1998 Audi A4 Engine Cooling Parts

If you’re looking for a top-quality Engine Cooling Part for your 1998 Audi A4, Advance Auto Parts has exactly what you need with our selection of Carquest Premium Engine Cooling Parts. We have 3 Carquest Premium Engine Cooling Parts in stock for this fitment, all known for their durability and precision fit. With prices starting at just $13.99 and an average cost of $82.76, you’ll find the perfect Engine Cooling Part for your needs and budget. Carquest Premium Engine Cooling Parts for the 1998 Audi A4 come highly rated, with over 22 customer reviews and an impressive average rating of 4.4 stars. Choosing a Carquest Premium Engine Cooling Part from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Radiator: With Transmission Oil Cooler
from $216.99
(7)
Radiator: With Transmission Oil Cooler
“Perfect fit for my B5.5 Passat 2.8L 5spd manual trans even tho it’s for an auto car.”
Standard Thermostat: 190 Degrees
from $17.29
(12)
Standard Thermostat: 190 Degrees
“Replaced my old worn out thermostat with this one and got me back up and running.”
Standard Reservoir Cap: 20 PSI
from $13.99
(3)
Standard Reservoir Cap: 20 PSI
“Great price”

Top-Quality Mahle 1998 Audi A4 Engine Cooling Parts

For those in search of a high-quality Engine Cooling Part for their 1998 Audi A4, Advance Auto Parts offers a great selection of Mahle Engine Cooling Parts. With 1 Mahle Engine Cooling Parts in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Engine Cooling Parts start at just $2.49, giving you a range of options to suit your budget. Backed by over 1 customer ratings and an average rating of 4.4 stars, Mahle Engine Cooling Parts provide both reliability and excellent performance. Choosing a Mahle Engine Cooling Part from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Engine Coolant Thermostat Housing Gasket
from $2.49
(1)
Engine Coolant Thermostat Housing Gasket
“So far so good”

FAQs for 1998 Audi A4 Engine Cooling Parts

What are the best-selling Engine Cooling Parts for 1998 Audi A4s?

Out of 41 Engine Cooling Parts that fit 1998 Audi A4s, the following parts are the top sellers:

What’s the price range for 1998 Audi A4 Engine Cooling Parts?

The prices of Engine Cooling Parts for the 1998 Audi A4 range from $2.49 up to $338.99 for the most premium parts.

What is the average price of an Engine Cooling Part for a 1998 Audi A4?

The average price for Engine Cooling Parts for the 1998 Audi A4 is $64.71. Keep in mind the variety of part types within our Engine Cooling Part category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Engine Cooling Parts for other Audi A4 model years?

Yes, we carry Engine Cooling Parts for 23 model years of Audi A4s between 1996 and 2020. The following model years are the most popular for Engine Cooling Part purchases: 2020, 2019, 2018, 2017, 2016, 2015, 2014, 2013, and 2012.

What are the cheapest Engine Cooling Parts for my 1998 Audi A4?

The cheapest 1998 Audi A4 Engine Cooling Parts we carry are:

Does Advance Auto Parts sell Engine Cooling Parts for any other 1998 Audi models?

Yes. We stock Engine Cooling Parts for 5 other popular 1998 Audi models. Some of the most popular are 1998 A4 Quattro Engine Cooling Parts, 1998 A6 Quattro Engine Cooling Parts, 1998 A6 Engine Cooling Parts, 1998 A8 Quattro Engine Cooling Parts, and 1998 A8 Engine Cooling Parts.

What are the top-rated Engine Cooling Parts that fit the 1998 Audi A4?

The one 1998 Audi A4 Engine Cooling Part we have in stock is the Water Pump Gasket. It is rated 4.5 stars and costs $2.49.

What types of Engine Cooling Parts do you sell for my 1998 Audi A4?

As of 11/2/25, these are some of the most in-demand types of Engine Cooling Parts for a 1998 Audi A4:

Can I get help with 1998 Audi A4 Engine Cooling Part orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Audi Engine Cooling Parts and more.

What is your return policy for Audi A4 Engine Cooling Parts?

Advance Auto Parts keeps returns simple. For new Audi A4 Engine Cooling Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.