2003 BMW 325xi Engine Cooling Parts

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Keep Your 2003 BMW 325xi 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 2003 BMW 325xi looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Thermostat and Water Outlet Assemblies, Coolant Reservoirs, and Water Pumps. 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, Imperial, and Beck/Arnley. For example, Carquest Premium Engine Cooling Parts start at just $25.99 with an average 4.4 star rating. Imperial and Beck/Arnley offer similar pricing and quality, backed by strong customer feedback. With over 506 reviews and a solid 4 star average, you can shop with confidence knowing other BMW 325xi owners approve.

Competitive Prices and Extensive Inventory

The average price for a 2003 BMW 325xi Engine Cooling Part at Advance Auto Parts is around $70.37, with a range that starts at $1.99 and goes up to $356.99. With 46 options in stock from 14 trusted brands, finding the right fit is easy. Popular picks like Adjustable Thermostatic Fan Control, Pressurized Coolant Reservoir: Black, Plastic, Original Equipment Replacement, and Adjustable Thermostatic Fan Control start at just $23.99 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 Blower Motor and Related Products and HVAC Electrical Parts. At Advance Auto Parts, we’re here to help you keep your 2003 BMW 325xi in peak condition, inside and out.

Essential 2003 BMW 325xi Engine Cooling Parts

MAHLE Original – Engine Coolant Pipe O-Ring (Part No.C32348)

Engine Coolant Pipe O-Ring

from

$1.99
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
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Dorman – Engine Water Pump Pulley (Part No.300-394)

Engine Water Pump Pulley

from

$56.99
Damaged your engine water pump pulley This pulley is a direct replacement for the original manufacturer’s part on specific vehicle years, makes and models, restoring proper performance.

Product Features:
  • Direct replacement – this engine water pump pulley matches the fit and function of the original part on specific vehicles
  • Durable design – built to withstand the elements and road debris
  • Thoroughly tested – must pass strict standards to ensure reliable longevity
  • Trustworthy quality – backed by team of engineers and inspectors in United States
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Victor Reinz – Engine Coolant Thermostat Gasket (Part No.71-33071-00)

Engine Coolant Thermostat Gasket

from

$15.49
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.
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Carquest Premium – Integrated Thermostat Housing (Part No.85955)

Integrated Thermostat Housing

from

$132.99
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)
  • Coated with corrosion and rust inhibitor
  • 100% leak tested
  • All-in-one bolt on solution for a complete repair
  • Includes quality thermostat
  • Meets and/or exceeds OEM standard
  • Includes quality gasket or O-ring to ensure proper seal (where applicable)
  • Coated with corrosion and rust inhibitor
  • 100% leak tested
  • All-in-one bolt on solution for a complete repair
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Delphi – Engine Coolant Temperature Sensor (Part No.TS10270)

Engine Coolant Temperature Sensor

from

$25.99
Delphi’s history is one of OE heritage and quality. Our global technical requirements include design specifications and validation testing based on over 100 years of OE experience. Our material selections, material thickness, and material types are built from OE specifications to exceed aftermarket expectations. We put in place strict manufacturing processes to ensure quality control in every part we make. Delphi’s pioneering spirit delivers innovative solutions designed to support the aftermarket in servicing the vehicles of today, and tomorrow.

Product Features:
  • Delphi temperature sensors deliver accurate readings and optimal performance
  • Delphi’s 1 piece design and automated production process eliminates internal connectors and failure points
  • Each sensor is electrically insulated to eliminate interference from other components in the vehicle
  • Delphi temperature sensors are impervious to electrical noise and interference
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URO Parts – Cooling Fan Blade (Part No.11521712058)

Cooling Fan Blade

from

$18.99
For European vehicles, A.P.A. manufactures the URO Parts brand of quality replacement parts, which meet or exceed OEM specifications. URO Parts components are ideal for both professional and DIY vehicle repair, and are often the exclusive aftermarket alternative to overpriced ¿Genuine¿ components. By reducing deferred maintenance with URO Parts, you will increase the bottom line of your business. With its URO Premium line, A.P.A. offers problem-solving upgraded components that are superior to failure-prone OEM parts in design and/or materials. A.P.A. is so confident in the longevity and reliability of URO Premium products, . URO Parts also specializes in accurate reproduction parts for classic vehicles, including a huge variety of items that are no longer available from the dealer.

Product Features:
  • Guaranteed fitment
  • Replace your cracked or aging fan blade before flying pieces destroy your radiator or other expensive engine components
  • Manufactured to OE fan blade dimensions for proper clearances and efficiency
  • Easy bolt-on installation instantly restores proper cooling fan performance
  • High-quality materials withstand brutal engine heat and vibration
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Dorman – Radiator Fan Assembly: Single, with Controller, Cost Effective and Reliable (Part No.621-199)

Radiator Fan Assembly: Single, with Controller, Cost Effective and Reliable

from

$241.99
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
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Rein – Coolant Pipe (Part No.CHP0569)

Coolant Pipe

from

$59.99
Rein Automotive OE quality coolant pipes fit European vehicles the way the original manufacturer intended. Designed to be a direct replacements for the OE coolant, Rein coolant pipes are identical to the OEM.

Product Features:
  • Designed as direct-fit replacements to ensure trouble-free proper installation.
  • Made to strict engineering quality standards.
  • Part is produced using only the highest quality materials.
  • Resistant to heat, salt, road debris, oil and other contaminants.
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URO Parts – AT Oil Cooler Thermostat, Mounts by Expansion Tank (Part No.17111437362)

AT Oil Cooler Thermostat, Mounts by Expansion Tank

from

$23.99
For European vehicles, A.P.A. manufactures the URO Parts brand of quality replacement parts, which meet or exceed OEM specifications. URO Parts components are ideal for both professional and DIY vehicle repair, and are often the exclusive aftermarket alternative to overpriced ¿Genuine¿ components. By reducing deferred maintenance with URO Parts, you will increase the bottom line of your business. With its URO Premium line, A.P.A. offers problem-solving upgraded components that are superior to failure-prone OEM parts in design and/or materials. A.P.A. is so confident in the longevity and reliability of URO Premium products, . URO Parts also specializes in accurate reproduction parts for classic vehicles, including a huge variety of items that are no longer available from the dealer.

Product Features:
  • Guaranteed fitment
  • High-flow OE-style design for optimal transmission cooling performance
  • Thermostat is manufactured to factory dimensions for easy installation
  • High-quality materials are temperature-stable to resist failure that can lead to oil leakage
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KAI – Radiator (Part No.RAD2636)

Radiator

from

$123.99
New Platinum Pro Radiator, 2.2/2.5/2.8/3.0 Liter Engines, Automatic Transmission

Product Features:
  • 2.2/2.5/2.8/3.0 Liter Engines, Automatic Transmission, 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
  • Warranty: 5 Year, Limited
  • Radiator Cap Not Included
  • Check Out The Large Selection Of Parts Available For Your Vehicle
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Vaico – Screw (Part No.Y2003305149VCO)

Screw

from

$18.70
Screw

Imperial – Adjustable Thermostatic Fan Control (Part No.226203)

Adjustable Thermostatic Fan Control

from

$23.99
Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:
  • Economy adjustable thermostatic fan control
  • Economy Model; 32-248 Deg. F
  • For use with Imperial electric fans
  • Probe installs into radiator fins
  • Contains gaskets, O-rings, or seals to properly replace the product
  • Brass construction for accurate temperature sensing
  • Zinc coated terminal to resist corrosion
  • Vehicle specific applications
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Carquest Premium – Engine Coolant Temperature Switch (Part No.WTA1851)

Engine Coolant Temperature Switch

from

$41.99
Carquest Premium Vehicle Solutions provides high-quality solutions for a wide range of applications. The Engine Coolant Temperature Sensor/Switch accurately monitors the engine’s temperature, enabling timely adjustments to the cooling system and preventing overheating, which enhances engine performance and longevity. Engineered for maximum performance and durability, our products are built to excel in even the most demanding conditions, ensuring reliable operation and long-lasting value.

Product Features:
  • Durable Construction: Designed with high-quality materials to withstand harsh environmental conditions, ensuring long-lasting performance in extreme temperatures, vibrations, and moisture exposure.
  • Precision Engineering: Accurate sensing and switching capabilities provide reliable performance, reducing the risk of malfunctions and improving vehicle safety and efficiency.
  • Easy Installation & Maintenance: Designed for quick installation and minimal upkeep, reducing downtime and repair costs for both manufacturers and consumers.
  • Fit/Form/Function: Each vehicle electronic component is engineered to meet or surpass OEM standards, ensuring precise fit, optimal functionality, and reliable performance.
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Motorad – Radiator Cap: 20 PSI (Part No.T-64)

Radiator Cap: 20 PSI

from

$26.99
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
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US MOTOR WORKS – Water Pump with Fan Clutch (Part No.MCK1094)

Water Pump with Fan Clutch

from

$151.99
US Motor Works Professional Series Water Pump with Fan Clutch are designed to replace the mechanical components of a cooling system. A proper water pump replacement should include a new fan clutch as the two are connected to the same shaft and work together to move the air and cooling fluid. Replacing one without the other can damage the new part and cause repeat work or engine trouble. This matched set will allow your vehicle continued operation in the demanding environment of today’s engine. All components are brand new and QA inspected for perfect fit and function. Restore your cooling power by installing a US Motor Works Professional Series Water Pump with Fan Clutch.

Product Features:
  • Fan clutch mounts to the water pump and should be replaced at the same time.
  • Matched set for proper water pump or fan clutch replacement
  • Includes mounting hardware, gaskets and accessories as required.
  • Complete mechanical cooling parts replacement
  • Factory tested and 100% new product
  • Meets or exceeds OEM quality
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Carquest Premium – Integrated Thermostat Housing: With Sensor, With Seal, 207 Degrees (Part No.14602)

Integrated Thermostat Housing: With Sensor, With Seal, 207 Degrees

from

$83.99
Carquest Premium Integrated Housing Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This integrated thermostat housing 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 as well as the design and function of the housing. 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
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Carquest Premium – Engine Water Pump: New, Gasket/Seals Included (Part No.T1169)

Engine Water Pump: New, Gasket/Seals Included

from

$74.99
Carquest Premium water pumps are 100% new, high-quality parts that meet or exceed original equipment (O.E.) specifications. All components, including the housing, hub, bearings, gaskets and seals are designed for long-lasting service life. These water pumps are supplied with the gaskets or seals necessary for installation. Our Carquest Premium water pumps undergo stringent testing to ensure superior performance that we stand behind with an industry-leading warranty.

Product Features:
  • 100% tested for reliable performance
  • Durable housing features precisely machined mounting surface for proper sealing and fitment
  • Equipped with weep chamber or similar feature to help prevent unnecessary replacement
  • Included heavy-duty unitized bearings, pressed-on hubs and optimal impeller clearance for a long-lasting water pump
  • All gaskets or seals necessary for water pump are included
  • This pump is driven by the accessory belt and we recommend replacement if nearing service recommendation
  • This pump is driven by the timing chain; see vehicle manufacturer recommendation for replacement of timing components
  • This pump is driven by the timing belt; see vehicle manufacturer recommendation for replacement of timing components
  • Additional Notes: Includes gasket
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URO Parts – Water Pump, w/Metal Impeller (Part No.11517527799)

Water Pump, w/Metal Impeller

from

$32.99
For European vehicles, A.P.A. manufactures the URO Parts brand of quality replacement parts, which meet or exceed OEM specifications. URO Parts components are ideal for both professional and DIY vehicle repair, and are often the exclusive aftermarket alternative to overpriced ¿Genuine¿ components. By reducing deferred maintenance with URO Parts, you will increase the bottom line of your business. With its URO Premium line, A.P.A. offers problem-solving upgraded components that are superior to failure-prone OEM parts in design and/or materials. A.P.A. is so confident in the longevity and reliability of URO Premium products, . URO Parts also specializes in accurate reproduction parts for classic vehicles, including a huge variety of items that are no longer available from the dealer.

Product Features:
  • Equipped with metal impeller for efficient flow and greater durability (OE plastic impellers can shatter and clog cooling system passages with broken pieces)
  • Guaranteed fitment
  • Manufactured to OE dimensions for easy installation and proper pulley alignment
  • Constructed of high-strength alloy and composite materials (where applicable)
  • Quality bearings and seals for long-term reliability
  • Function-tested for performance
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Dorman – Pressurized Coolant Reservoir: Black, Plastic, Original Equipment Replacement (Part No.603-535)

Pressurized Coolant Reservoir: Black, Plastic, Original Equipment Replacement

from

$86.99
Engine coolant reservoirs can crack and leak when they become brittle over time. This replacement reservoir is designed to match the fit, function, and performance of an original reservoir on specified BMW vehicles. This reservoir includes a thermostat, mounting clip, reservoir cap, and coolant level sensor for a complete repair.

Product Features:
  • Direct replacement – this engine coolant reservoir is made to match the fit and performance of the original equipment on specified BMW vehicles and designed to help restore cooling system function
  • Complete solution – this reservoir includes a thermostat, mounting clip, reservoir cap, and coolant level sensor to help ensure a professional and predictable repair
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

Rein – Expansion Tank (Part No.EPT0018)

Expansion Tank

from

$64.99
Rein Automotive OE quality expansion tanks, install, fit and perform the way the original manufacturer intended. These tanks are designed to match or exceed the OE materials used and are produced from virgin plastic with no regrind to prevent cracking from heat cycles and ensure the plastic is durable and will have a long service life.

Product Features:
  • Produced from virgin plastic meeting/exceeding OE specifications and ensuring long life
  • Resistant to cracking and wear from heat cycles preventing coolant loss
  • Direct fitment allows easy installation
  • Manufactured to strict engineering standards/specifications in materials and tolerances
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Dorman – Brass Coolant Air Bleeder Screw (OE Fix) (Part No.902-404HP)

Brass Coolant Air Bleeder Screw (OE Fix)

from

$8.99
On certain BMW, Mini, Chrysler, Dodge, Jeep, and Ram vehicles, the original equipment engine coolant bleeder screw is made of plastic. Over time and during normal service, the head of the plastic screw deforms, becomes difficult to turn, and inevitably requires replacement. This Dorman OE FIX coolant air bleeder screw is made of brass to resist deforming during service, saving the expense of replacing the original screw with the same failure-prone plastic design.

Product Features:
  • Upgraded material – this brass coolant air bleeder screw reduces future maintenance costs by replacing the original equipment plastic screw on specified BMW, Mini, Chrysler, Dodge, Jeep, and Ram vehicles
  • Ideal solution – instead of wasting time wrestling with a deformed plastic screw head, this sturdy brass screw ensures easy, reliable removal and reuse
  • Durable construction – made of quality brass for reliable performance and long service life
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
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Dorman – Coolant Air Bleeder Screw (Part No.902-404)

Coolant Air Bleeder Screw

from

$14.99
This engine coolant bleeder screw has been manufactured from durable material to prevent cooling system leaks. Matches the original screw for fit and function.

Product Features:
  • Ideal replacement – this engine coolant bleeder screw matches fit and function of the original equipment screw
  • Durable materials – designed to withstand high cooling system temperatures and pressures
  • Cost-effective solution – this bleeder screw offers original equipment quality at a competitive price
  • Quality tested – this part has undergone try-on and material testing to ensure a quality fit and Length service life
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Carquest Premium – Standard Duty Fan Clutch – Thermal 6" Import/Compact (Part No.215024)

Standard Duty Fan Clutch - Thermal 6" Import/Compact

from

$176.99
Please note: Advance Auto Parts is proud to carry comparable exact-fit parts from multiple vendors, as such, the item you receive may be one of two quality brands. Both brands meet the same fitment requirements and are equal in their performance and specifications. The fan clutch is the component of the cooling system that varies the fan speed to meet the cooling needs of the engine. The fan clutch provides high airflow volume and, by only operating the fan as needed, promotes good fuel economy. CARQUEST fan clutches are designed to meet OE performance specifications.

Product Features:
  • Designed, tested, and built by application
  • OE performance, fit, and appearance
  • Precision machined
  • Out of box installation
  • Designed, tested, and built by application
  • OE performance, fit, and appearance
  • Precision machined
  • Out of box installation
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URO Parts – Cooling Fan Shroud (Part No.17111436259)

Cooling Fan Shroud

from

$42.49
For European vehicles, A.P.A. manufactures the URO Parts brand of quality replacement parts, which meet or exceed OEM specifications. URO Parts components are ideal for both professional and DIY vehicle repair, and are often the exclusive aftermarket alternative to overpriced ¿Genuine¿ components. By reducing deferred maintenance with URO Parts, you will increase the bottom line of your business. With its URO Premium line, A.P.A. offers problem-solving upgraded components that are superior to failure-prone OEM parts in design and/or materials. A.P.A. is so confident in the longevity and reliability of URO Premium products, . URO Parts also specializes in accurate reproduction parts for classic vehicles, including a huge variety of items that are no longer available from the dealer.

Product Features:
  • Guaranteed Fitment
  • High Quality Materials
  • Controls cooling fan airflow through radiator and engine compartment
  • Easy bolt-on installation instantly restores proper cooling fan performance and efficiency
  • Manufactured to OE cooling fan shroud dimensions for proper clearances
  • High-quality materials withstand brutal engine heat and vibration
See More

Victor Reinz – Engine Water Pump Housing O-Ring (Part No.41-10453-00)

Engine Water Pump Housing O-Ring

from

$5.99
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

Most Popular Thermostat and Water Outlet Assemblies for 2003 BMW 325xis

Enhance your 2003 BMW 325xi with one of the 4 Thermostat and Water Outlet Assemblies we have in stock, starting at just $83.99.

Carquest Premium – Integrated Thermostat Housing: With Sensor, With Seal, 207 Degrees (Part No.14602)

Integrated Thermostat Housing: With Sensor, With Seal, 207 Degrees

from

$83.99
Carquest Premium Integrated Housing Thermostats are manufactured with OEM quality materials and safety standards by an OE Supplier. This integrated thermostat housing 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 as well as the design and function of the housing. 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

Beck/Arnley – Thermostat (Part No.143-0825)

Thermostat

from

$126.99
Beck/Arnley parts meet foreign nameplate OE specifications for form, fit and function. Our product specialists work with a network of global sourcing partners so you can install the right part with confidence.

Product Features:
  • Matches OE form, fit and function
  • Premium materials to withstand extreme temperatures and long stroke for maximum cooling
  • Quality construction for durability
  • Be sure to use the proper coolant to maximize cooling system components. See Beck/Arnley catalog for the coolant for this application.
  • Application specific for this vehicle
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Rein – Thermostat Assembly 97C (Part No.CTA0011)

Thermostat Assembly 97C

from

$109.99
Rein Automotive OE quality thermostat assemblies 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 assemblies 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 assemblies aim to provide the professional 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
  • Direct fitments allows easy installation
  • Manufactured to strict engineering standards/specifications in materials and tolerances
  • Thermostat set to 97 degrees Celsius for optimal running temperature
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Dorman – Thermostat Assembly: Includes Housing, Thermostat, and Gasket, 206 Degrees (Part No.902-813)

Thermostat Assembly: Includes Housing, Thermostat, and Gasket, 206 Degrees

from

$98.99
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
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Best-Selling 2003 BMW 325xi Coolant Reservoirs

Upgrade your 325xi with one of our 5 best-selling Coolant Reservoirs, earning an average 3.5 stars rating across 19 reviews.

Dorman – Pressurized Coolant Reservoir: Black, Plastic, Original Equipment Replacement (Part No.603-535)

Pressurized Coolant Reservoir: Black, Plastic, Original Equipment Replacement

from

$86.99
Engine coolant reservoirs can crack and leak when they become brittle over time. This replacement reservoir is designed to match the fit, function, and performance of an original reservoir on specified BMW vehicles. This reservoir includes a thermostat, mounting clip, reservoir cap, and coolant level sensor for a complete repair.

Product Features:
  • Direct replacement – this engine coolant reservoir is made to match the fit and performance of the original equipment on specified BMW vehicles and designed to help restore cooling system function
  • Complete solution – this reservoir includes a thermostat, mounting clip, reservoir cap, and coolant level sensor to help ensure a professional and predictable repair
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

KAI – Coolant Reservoir (Part No.BM3014102)

Coolant Reservoir

from

$66.99
New Platinum Pro Coolant Recovery Tank, Models With 6 Cylinder Engine

Product Features:
  • Models With 6 Cylinder Engine, Made Of Plastic
  • 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
  • Check Out The Large Selection Of Parts Available For Your Vehicle
See More

Rein – Expansion Tank (Part No.EPT0018)

Expansion Tank

from

$64.99
Rein Automotive OE quality expansion tanks, install, fit and perform the way the original manufacturer intended. These tanks are designed to match or exceed the OE materials used and are produced from virgin plastic with no regrind to prevent cracking from heat cycles and ensure the plastic is durable and will have a long service life.

Product Features:
  • Produced from virgin plastic meeting/exceeding OE specifications and ensuring long life
  • Resistant to cracking and wear from heat cycles preventing coolant loss
  • Direct fitment allows easy installation
  • Manufactured to strict engineering standards/specifications in materials and tolerances
See More

Rein – Expansion Tank Kit (Part No.EPK0018)

Expansion Tank Kit

from

$87.99
Rein Automotive OE quality expansion tank kits, install, fit and perform the way the original manufacturer intended. These tanks are designed to match or exceed the OE materials used and are produced from virgin plastic with no regrind to prevent cracking from heat cycles and ensure the plastic is durable and will have a long service life

Product Features:
  • Includes sensor (if applicable) and Cap
  • Produced from virgin plastic meeting/exceeding OE specifications and ensuring long life
  • Resistant to cracking and wear from heat cycles preventing coolant loss
  • Direct fitment allows easy installation
See More

URO Parts – Expansion Tank, Includes clamp Part# 17 11 1 707 777 (Part No.17137787039)

Expansion Tank, Includes clamp Part# 17 11 1 707 777

from

$34.99
For European vehicles, A.P.A. manufactures the URO Parts brand of quality replacement parts, which meet or exceed OEM specifications. URO Parts components are ideal for both professional and DIY vehicle repair, and are often the exclusive aftermarket alternative to overpriced ¿Genuine¿ components. By reducing deferred maintenance with URO Parts, you will increase the bottom line of your business. With its URO Premium line, A.P.A. offers problem-solving upgraded components that are superior to failure-prone OEM parts in design and/or materials. A.P.A. is so confident in the longevity and reliability of URO Premium products, . URO Parts also specializes in accurate reproduction parts for classic vehicles, including a huge variety of items that are no longer available from the dealer.

Product Features:
  • Guaranteed fitment
  • Precision-molded to OE dimensions to ensure compatibility with original sensors and connections
  • Quality materials resist engine heat and harsh cooling system environment
  • Factory pressure-tested
See More

Top-Quality Water Pumps for 2003 BMW 325xis

Choose a high-quality OEM or aftermarket Water Pump for BMW 325xis and enjoy top-notch performance from $32.99.

Beck/Arnley – New Water Pump (Part No.131-2130)

New Water Pump

from

$82.99
Beck/Arnley parts meet foreign nameplate OE specifications for form, fit and function. Our product specialists work with a network of global sourcing partners so you can install the right part with confidence.

Product Features:
  • Matches OE form, fit and function
  • Heavy duty bearings, sealed and lubed for life
  • Includes all necessary gaskets and seals needed for a complete installation
  • Where applicable, metal and resin impellers are offered. See catalog to match pump to this vehicle
  • Be sure to use the proper coolant to maximize cooling system components. See Beck/Arnley catalog for the coolant for this application.
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Carquest Premium – Engine Water Pump: New, Gasket/Seals Included (Part No.T1169)

Engine Water Pump: New, Gasket/Seals Included

from

$74.99
Carquest Premium water pumps are 100% new, high-quality parts that meet or exceed original equipment (O.E.) specifications. All components, including the housing, hub, bearings, gaskets and seals are designed for long-lasting service life. These water pumps are supplied with the gaskets or seals necessary for installation. Our Carquest Premium water pumps undergo stringent testing to ensure superior performance that we stand behind with an industry-leading warranty.

Product Features:
  • 100% tested for reliable performance
  • Durable housing features precisely machined mounting surface for proper sealing and fitment
  • Equipped with weep chamber or similar feature to help prevent unnecessary replacement
  • Included heavy-duty unitized bearings, pressed-on hubs and optimal impeller clearance for a long-lasting water pump
  • All gaskets or seals necessary for water pump are included
  • This pump is driven by the accessory belt and we recommend replacement if nearing service recommendation
  • This pump is driven by the timing chain; see vehicle manufacturer recommendation for replacement of timing components
  • This pump is driven by the timing belt; see vehicle manufacturer recommendation for replacement of timing components
  • Additional Notes: Includes gasket
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URO Parts – Water Pump, w/Metal Impeller (Part No.11517527799)

Water Pump, w/Metal Impeller

from

$32.99
For European vehicles, A.P.A. manufactures the URO Parts brand of quality replacement parts, which meet or exceed OEM specifications. URO Parts components are ideal for both professional and DIY vehicle repair, and are often the exclusive aftermarket alternative to overpriced ¿Genuine¿ components. By reducing deferred maintenance with URO Parts, you will increase the bottom line of your business. With its URO Premium line, A.P.A. offers problem-solving upgraded components that are superior to failure-prone OEM parts in design and/or materials. A.P.A. is so confident in the longevity and reliability of URO Premium products, . URO Parts also specializes in accurate reproduction parts for classic vehicles, including a huge variety of items that are no longer available from the dealer.

Product Features:
  • Equipped with metal impeller for efficient flow and greater durability (OE plastic impellers can shatter and clog cooling system passages with broken pieces)
  • Guaranteed fitment
  • Manufactured to OE dimensions for easy installation and proper pulley alignment
  • Constructed of high-strength alloy and composite materials (where applicable)
  • Quality bearings and seals for long-term reliability
  • Function-tested for performance
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Our Top Pick for a 2003 BMW 325xi Thermostat and Water Outlet Gasket

Invest in a durable Thermostat and Water Outlet Gasket for your 2003 BMW, knowing you’re getting trusted brands and expert craftsmanship.

Victor Reinz – Engine Coolant Thermostat Gasket (Part No.71-33071-00)

Engine Coolant Thermostat Gasket

from

$15.49
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.
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Top-Rated Radiators for 2003 BMW 325xis

Make a smart move for your 2003 BMW 325xi with products all priced from $123.99 to $134.99.

Carquest Premium – Radiator (Part No.432528)

Radiator

from

$134.99
Carquest Premium Radiators offer one of the largest product ranges in the aftermarket, covering more than 95% of the popular automotive and light truck applications. Carquest Premium Radiators meet or exceed original equipment specifications, ensuring that products fit and perform just as well or better than the original parts, providing you peace of mind.

Product Features:
  • Our B-type tubes feature central reinforcement to provide greater tolerance to pressure. Stronger tube design means drastically reduced probability of tube failure.
  • Our deep extrusion header provides a stronger tube to header joint which is more resistant to the effects of vibration and thermal tube expansion, virtually eliminating tube to header leaks.
  • Our fin edges are folded for increased stability and heat disbursement properties.
  • Our included “multi-fit” attachments allow one radiator to cover multiple vehicle applications without sacrificing OE fit. This results in wider vehicle coverage with substantially less inventory.
  • Thermal expansion cuts allow for longer life and reduce failure rates by allowing improved core expansion and contraction during normal heat cycles.
  • We design and manufacture all our radiators to meet or even exceed Original Equipment specifications. We take pride in producing the most reliable replacement parts in the market.
  • We use longer header tabs for increased pressure resistance. This reduces the potential for tank to header leaks.
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KAI – Radiator (Part No.RAD2636)

Radiator

from

$123.99
New Platinum Pro Radiator, 2.2/2.5/2.8/3.0 Liter Engines, Automatic Transmission

Product Features:
  • 2.2/2.5/2.8/3.0 Liter Engines, Automatic Transmission, 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
  • Warranty: 5 Year, Limited
  • Radiator Cap Not Included
  • Check Out The Large Selection Of Parts Available For Your Vehicle
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KAI – Radiator (Part No.RAD2635)

Radiator

from

$134.99
New Platinum Pro Radiator, 2.5 And 3.0 Liter Engines, Manual Transmission

Product Features:
  • 2.5 And 3.0 Liter Engines, Manual Transmission, 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
  • Warranty: 5 Year, Limited
  • Radiator Cap Not Included
  • Check Out The Large Selection Of Parts Available For Your Vehicle
See More

Top-Rated Engine Cooling Part Brands For Your 2003 BMW 325xi

When it comes to finding the perfect Engine Cooling Part for your 2003 BMW 325xi, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 14 trusted brands. We carry the most popular Engine Cooling Part brands including Carquest Premium, Imperial, 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 $23.99. Purchasing a Engine Cooling Part from us here at Advance Auto Parts is a smart move for both you and your 2003 BMW 325xi, providing peace of mind with parts that meet or exceed OEM standards.

Popular Carquest Premium 2003 BMW 325xi Engine Cooling Parts

If you’re looking for a top-quality Engine Cooling Part for your 2003 BMW 325xi, 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 $25.99 and an average cost of $61.66, you’ll find the perfect Engine Cooling Part for your needs and budget. Carquest Premium Engine Cooling Parts for the 2003 BMW 325xi come highly rated, with over 93 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 Cap: 30 PSI
from $25.99
(14)
Radiator Cap: 30 PSI
“Work well”
Integrated Thermostat Housing: With Sensor, With Seal, 207 Degrees
from $83.99
(47)
Integrated Thermostat Housing: With Sensor, With Seal, 207 Degrees
“Perfect fit! love the way this just fit perfectly. No issues.”
Engine Water Pump: New, Gasket/Seals Included
from $74.99
(32)
Engine Water Pump: New, Gasket/Seals Included
“Easy installation and it came with a seal.”

Top-Quality Imperial 2003 BMW 325xi Engine Cooling Parts

For those in search of a high-quality Engine Cooling Part for their 2003 BMW 325xi, Advance Auto Parts offers a great selection of Imperial Engine Cooling Parts. With 1 Imperial 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 $23.99, giving you a range of options to suit your budget. Backed by over 35 customer ratings and an average rating of 4.1 stars, Imperial Engine Cooling Parts provide both reliability and excellent performance. Choosing a Imperial Engine Cooling Part from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Adjustable Thermostatic Fan Control
from $23.99
(35)
Adjustable Thermostatic Fan Control
“good price, but does not come with knob to set temp”

FAQs for 2003 BMW 325xi Engine Cooling Parts

What are the best-selling Engine Cooling Parts for 2003 BMW 325xis?

Out of 46 Engine Cooling Parts that fit 2003 BMW 325xis, the following parts are the top sellers:

What’s the price range for 2003 BMW 325xi Engine Cooling Parts?

The prices of Engine Cooling Parts for the 2003 BMW 325xi range from $1.99 up to $356.99 for the most premium parts.

What is the average price of an Engine Cooling Part for a 2003 BMW 325xi?

The average price for Engine Cooling Parts for the 2003 BMW 325xi is $70.37. 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 BMW 325xi model years?

Yes, we carry Engine Cooling Parts for 4 model years of BMW 325xis between 2001 and 2006. The following model years are the most popular for Engine Cooling Part purchases: 2006, 2005, 2004, 2002, and 2001.

What are the cheapest Engine Cooling Parts for my 2003 BMW 325xi?

The cheapest 2003 BMW 325xi Engine Cooling Parts we carry are:

Does Advance Auto Parts sell Engine Cooling Parts for any other 2003 BMW models?

Yes. We stock Engine Cooling Parts for 15 other popular 2003 BMW models. Some of the most popular are 2003 325i Engine Cooling Parts, 2003 M3 Engine Cooling Parts, 2003 530i Engine Cooling Parts, 2003 330i Engine Cooling Parts, and 2003 Z4 Engine Cooling Parts.

What are the top-rated Engine Cooling Parts that fit the 2003 BMW 325xi?

The one 2003 BMW 325xi Engine Cooling Part we have in stock is the Engine Coolant Pipe O-Ring. It costs $1.99.

What types of Engine Cooling Parts do you sell for my 2003 BMW 325xi?

As of 3/1/26, these are some of the most in-demand types of Engine Cooling Parts for a 2003 BMW 325xi:

Can I get help with 2003 BMW 325xi 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 BMW Engine Cooling Parts and more.

What is your return policy for BMW 325xi Engine Cooling Parts?

Advance Auto Parts keeps returns simple. For new BMW 325xi Engine Cooling Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.