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BMW 325I Cooling & Heating

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Maradyne Mach Two Series Electric Fans

Maradyne Mach Two series truck electric fans feature dual 225 W high performance IP68 sealed motors attached to dual 11 in. diameter 5-blade fans to put out over 2,500 cfm of airflow. They have all glass-filled nylon construction and include dual harnesses for an easier installation. The fans are available with different mounting bracket positions, so you can match up with your radiator mounting style.

4.94 out of 5 stars ( 16 )

$338.96

CSF Racing Radiators

CSF racing radiators feature the most advanced and efficient radiator cores in the industry. Offered for both vehicle-specific and universal applications, they use innovative tube and fin technologies with industry-leading testing methods to maximize airflow and heat dissipation. Specially engineered tubes in the shape of a "B" are carefully formed and then brazed over the seam. CSF is able to use thinner and lighter aluminum because this design is stronger than normal welded "O" shape tubes. With the inlet in the middle of a seam-brazed tube, the surface area of the tubes is increased approximately 15 percent over regular tubes. With CSF's B-tubes you get dual liquid laminar flow and the efficiency of two smaller tubes vs. one large tube in the same space. High-efficiency, multi-louvered fins are precisely aligned to maximize airflow through each radiator core. Fin specifications are carefully measured and calculated for each application, and tested for maximum heat rejection efficiency in CSF's wind-tunnel lab. CSF offers two all-aluminum end-tank designs to match any style and performance needs. CSF 7000 Series racing radiators have OE-style radial tanks that are flat, rounded, and welded together. Perfect for the customer who likes the sleek and smooth look, and wants to display the intricate welding. CSF deep-drawn end tanks are stamped to the same geometry of OE plastic end tanks. The only high performance manufacture to feature this advanced radiator technology; CSF deep-drawn end tanks feature less welding, and are generally considered the strongest tanks in the industry. Additional features of CSF racing radiators include: * Finished with CSF's Show-Stopper mirror polish process * CAD/CAM designed * Racing-style aluminum drain plug * Brazed in a controlled atmosphere brazing (CAB) furnace—the preferred process for aluminum * ISO 9001/9002 certification * Military-grade (special clad) aluminum used for tubes, fins, and headers * Plates and side brackets meet JIS 3003 specifications * Privately owned factories with full in-house tool rooms * CNC-machined fittings * TIG welded

4.61 out of 5 stars ( 36 )

$319.00

$458.97

Maradyne Mach One Series Electric Fans

Maradyne Mach One series electric fans feature a quiet 225 W motor with S-blade design that work as pushers. They have a glass-filled nylon shroud and blade and are high-temperature and impact-resistant for harsh underhood temperatures and greater resistance to flying road debris.

5.0 out of 5 stars ( 1 )

$285.53

$370.40

Maradyne Pacesetter Medium-Profile Electric Fans

Maradyne Pacesetter medium-profile electric fans deliver economic efficiency for most any vehicle. Whether your vehicle is high performance or a daily driver, these S-blade designed fans will meet your needs. They are reversible, quiet, and feature glass-filled nylon construction with non-vented, medium-duty motors. They are available in a choice of diameters and each includes 90 degree mounting feet and a pigtail connector. Maradyne Pacesetter medium-profile electric fans offer a perfect fit for many projects and wallets.

5.0 out of 5 stars ( 2 )

$86.52

$90.39

CSF Radiators

CSF radiators are offered in the industry's widest variety, servicing thousands of vehicle-specific and universal applications … including every brand from Acura to Volkswagen. Whether your radiator is copper-brass, plastic-copper-brass, plastic-aluminum, or all-aluminum, CSF has you covered with the same materials and style as OE. CSF manufactures the highest quality aftermarket replacement radiators, with the strongest and most efficient components available in the industry. All CSF radiators undergo a rigorous testing process in their state-of-the-art testing lab. CSF's procedures and requirements set the bar for cooling system reliability and performance: * Individually leak tested * Vibration-cycle tested * Thermal-cycle tested * Wind tunnel tested for optimal radiator core cooling efficiency * Burst pressure and impulse-cycle tested for strength * Salt spray tested for corrosion protection * 10 ft. box drop test to ensure packaging protection * 30-point fitment inspection on critical dimensions to ensure drop-in fit with no modifications (where applicable)

4.18 out of 5 stars ( 97 )

$88.99

$565.00

Hayden Electric Fans

As a primary cooling source, Hayden Automotive electric fans slightly increase horsepower and fuel economy when replacing fan clutches and fan assemblies. These thin fans are manufactured with reversible blades for pusher and puller operation. Hayden uses high-quality, long-life electric motors to ensure performance and durability. They come available in 10, 12, 14, and 16 in. diameters.

4.58 out of 5 stars ( 12 )

$72.99

Hayden Super Duty Electric Fans

Hayden Automotive is proud to introduce a new performance series of electric fans to their current offering—Super Duty electric fans. These high-quality electric fans are perfect for performance enthusiasts and off-roaders who want upgraded cooling performance. With four fan sizes available in your choice of either a pusher or puller design, there's a Hayden Super Duty electric fan that'll fit your performance cooling needs. Super Duty electric fan features: * Premium quality Italian design and manufactured construction * Available in both pusher or puller designs, in a choice of 9 in., 12 in., 14 in. and 16 in. diameters (please specify model when placing your order) * Compatible with all Hayden fan controllers * IP68 waterproof and dust proof rating * Straight blade design for maximum airflow performance * Includes mounting hardware for ease of installation

Not Yet Reviewed

$99.99

$105.99

Mishimoto Performance Radiators

Mishimoto performance radiators are designed and engineered to maximize cooling efficiency, boost engine functions, and, most of all, protect your engine from overheating. Many stock radiators can't handle the additional heat that comes higher horsepower levels. So, swap out your stock radiator for an all-aluminum Mishimoto. Key features and benefits of Mishimoto performance radiators include: * Available for universal and exact fit applications (no cutting or modifications required) * All-aluminum construction for optimal heat dissipation, improved strength, and reliability * Increased cooling capacity due to their massive core size * 100 percent brazed aluminum core for minimal distortion, low stress, and clean joints * Available in various sizes with 2-row or 3-row cores * TIG-welded for clean, strong welds and increased durability * Magnetic drain plugs capture metallic debris or fragments * Included high-pressure 1.3 bar cap raises the coolant boiling point for greater safety and efficiency * Automatic transmission and accessory coolers included where applicable

4.41 out of 5 stars ( 318 )

$288.76

$539.95

Sherman Radiator Core Supports

Sherman radiator core supports are engineered to provide an easy fit and finish to give your radiator a better foundation. Securing your radiator and keeping it in its proper place provides better performance and lasting service life. Mount your radiator solidly with Sherman radiator core supports.

2.89 out of 5 stars ( 46 )

$38.99

$102.99

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Four Seasons Electric Fan Kits

Get the chill factor for better engine performance with Four Seasons electric fan kits. These drop-in replacements have original equipment quality and connectors for a perfect fit that you do yourself, saving yourself time and money. These fans are made of durable, heavy-duty plastic to provide quiet operation and dependable service. Keep your engine cool to perform as it should with Four Seasons electric fan kits.

4.37 out of 5 stars ( 19 )

$110.99


$67.99

$124.99

EMP Stewart Performance Mechanical Water Pumps

These EMP Stewart performance mechanical water pumps are designed to keep your engine cool without robbing you of excessive power. EMP Stewart has spent years devoted to developing and designing the best and most efficient water pumps available for street and race cars. Their optimized impeller design, improved water passages, and heavy-duty bearings result in water pumps capable of pumping more water with less parasitic loss than factory pumps. Whether you are looking for an aftermarket replacement pump or need the increased flow for your race car, EMP Stewart has you covered with these performance mechanical water pumps.

5.0 out of 5 stars ( 2 )

$215.95

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Four Seasons HVAC Door Actuators

Four Seasons HVAC door actuators are key components to maintaining the proper climate inside your vehicle. The actuator motors control the internal vent that allows the correct mix of cold and hot air for your desired comfort. These replacement units are offered in a variety of actuator types to control temperature blend doors, air recirculation doors, and floor mode valves—and they're available for a wide range of cars, trucks, and vans. The OE-style connectors feature high-quality contacts to ensure conductivity. Issues with your heat and air conditioning could mean you simply need a new HVAC door actuator from Four Seasons.

4.0 out of 5 stars ( 4 )

$45.99

Beck/Arnley Coolant Thermostats

You always get high-quality replacement parts from Beck/Arnley. Their self-cleaning engine coolant thermostats are constructed from high-quality stainless steel and copper to prevent corrosion and have long-stroke capabilities to provide maximum cooling. They allow your engine to reach operating temperature quickly to reduce oil dilution, fuel consumption, and exhaust emissions. Improve the overall efficiency of your heating system with Beck/Arnley coolant thermostats.

4.09 out of 5 stars ( 11 )

$106.99

Mishimoto Coolant Reservoir Tanks

Mishimoto coolant reservoir tanks offer under-your-hood styling! Whether you're polishing the look of your engine bay or you just want to replace the plastic OEM tank, Mishimoto aluminum coolant reservoir tanks are your solution. These inclusive kits are delivered with a mounting bracket, hardware, and reinforced hose. Improve the aesthetics of your engine bay with polished aluminum coolant reservoir tanks from Mishimoto.

4.56 out of 5 stars ( 45 )

$166.95

$192.34

URO Parts Engine Cooling Fan Assemblies

URO Parts engine cooling fan assemblies are part of their extensive line of cooling system components. Offered for a variety of European makes and models with electric fans, URO Parts engine cooling fan assemblies are designed and carefully manufactured to be perfect OE replacements … for much less than OEM parts.

Not Yet Reviewed

$163.99

Mishimoto X-Line Radiators

Upgrade your cooling system with Mishimoto X-Line radiators! These lightweight, triple-core radiators enhance the performance and cooling efficiency of your engine, whether it's a daily driver or a race application. X-Line radiators feature 100 percent brazed aluminum construction and polished end tanks, and each includes a Mishimoto high-pressure 1.3 bar radiator cap. The units are available in both crossflow and downflow styles, as well as a variety of sizes, for fitment on countless makes/models. Mishimoto X-Line radiators help your engine reach its full potential!

4.43 out of 5 stars ( 69 )

$578.85

URO Parts Auxiliary Cooling Fan Assemblies

URO Parts auxiliary cooling fan assemblies are actually essential for your engine's performance. Providing better choices for your European vehicle, URO fans are designed and manufactured to the highest standards in precision, materials, and workmanship—to deliver parts that will fit and function properly. URO auxiliary cooling fan assemblies will efficiently turn on when needed and effectively force air through your radiator, maintaining optimal performance of your car's engine and components. Order the model recommended for your application.

5.0 out of 5 stars ( 1 )

$139.99

Moroso Cooling System Expansion Tanks

These expansion tanks are perfect for cars with low-mount radiators to provide a convenient filling location and to bleed off unwanted air. Versions are now available with rugged 6061-T6 billet aluminum filler necks welded to the tank to withstand the continuous removal and installation of the cap. They're 100 percent pressure- tested to eliminate leaks, and they accept a standard-size radiator cap (not included).

4.71 out of 5 stars ( 104 )

$445.99

CSF Fluid Coolers

CSF fluid coolers are part of a broad range that includes several designed, developed, and track proven in collaboration with BMW tuning specialists and parts manufacturers. Available coolers include: * Dual-pass, race-spec, DCT transmission coolers--a number are plug-and-play and include oil-line connections, mounting brackets, shrouds, and ducting * All-aluminum, controlled atmosphere brazed (CAB) dual-pass, plug-and-play, power steering coolers * Dual-pass, all-aluminum, race-spec engine oil coolers with cast end-tanks * Advanced and unique, dual-fluid, heavy-duty oil coolers with built-in fittings and included SPAL fan and sealed shroud. Additional features and benefits of CSF fluid coolers include: * Drop-in fit coolers require no modifications to install; They fit OE bumpers and accept factory oil-line connections, mounting brackets, shrouds, and ducts … even aftermarket splitters * Many feature dual-pass, high-performance cores that replace OEM single-pass designs for maximum surface area and flow * OE low-efficiency, mechanically bonded cores replaced with CAB-brazed, high-efficiency, turbulated, heavy-duty, bar and plate design cores for the most reliable and durable coolers available (on specific applications) * High-density, multi-louvered fin design with more surface area than OE units * Where applicable, fully TIG-welded end-tanks vs. OE mechanically jointed and tack-welded tanks for superior reliability and durability * Select applications include CSF's A/C condenser technology using super-high pressure, multi-channel micro-tubes * Lab tested to be more efficient than OEM coolers

5.0 out of 5 stars ( 2 )

$349.00

$499.00

Mishimoto Electric Water Pumps

N-Series BMW engines commonly suffer from frequent water pump failure. Despite being an inconvenience, it's a small compromise for the pure driving enjoyment produced by your BMW. If you're seeking a quality water pump replacement, Mishimoto has you covered with their new lineup of electric water pumps specifically designed for your BMW. The pumps restore cooling system performance and protect critical engine components. They're ideal for either repair or preventative maintenance. Order the direct-fit model for your OEM original pump. To further protect your cooling system and improve water pump lubrication, refill your system with Mishimoto Liquid Chill Synthetic Engine Coolant. As with all their products, the electric water pumps are covered by the Mishimoto Lifetime Warranty.

Not Yet Reviewed

$335.95

Clearance

Beck/Arnley Water Pumps

Beck/Arnley water pumps are precision-built and balanced OE replacements. They meet or exceed factory specifications, include heavy-duty steel bearings, and are sealed and lubricated for life. The pumps are available in a variety of configurations for fitment on specific vehicles. Beck/Arnley water pumps include the following features: * Designed for OE-fit and performance * Precision-ground shaft and hub accept OE fan clutches perfectly * OE-quality forged housing is specially formed to ensure maximum coolant flow * Unitized seal protects bearings for long life and leak-free performance * Factory-sealed, precision-ground, one-piece bearing assembly

4.09 out of 5 stars ( 11 )

$300.99

Mishimoto Thermostats

Mishimoto thermostats are effective in noticeably lowering engine coolant temperatures. These thermostats are built with high-quality wax and are shipped with new rubber gaskets (where applicable) for a good, leak-free seal. They are then digitally calibrated for precise operation. Mishimoto thermostats open up at a slightly lower temperature than OEM or standard thermostats once your engine is fully warmed up. This allows the coolant to flow through the engine sooner, thus reducing and maintaining cooler engine temperatures. Whether you have a daily driver or a modified and upgraded turbo, Mishimoto thermostats will maintain optimal temperatures to efficiently cool your application.

4.38 out of 5 stars ( 73 )

$68.95

$83.95

URO Parts Engine Cooling Fan Shrouds

URO Parts engine cooling fan shrouds are part of their extensive line of cooling system components. Available for a wide variety of European makes and models, URO Parts engine cooling fan shrouds are designed and carefully manufactured to be perfect OE replacements. Their outstanding performance and quality has qualified many URO Parts components as original equipment for prestigious European auto makers.

3.0 out of 5 stars ( 2 )

$31.99

$49.99

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Denso Radiators

Denso radiators offer reliable performance even under the most demanding conditions. Manufacturers rely on their quality and innovation to remain on the leading edge of engine cooling technology. Denso's OE experience and know-how ensure Denso radiators provide unmatched performance, reliability, and fitment. Radiator performance is essential for proper engine cooling and function. Denso's radiator configurations, tanks, fin pitch, core dimensions, and materials meet OE manufacturers' rigid standards. Plastic, copper, or aluminum components--it doesn't matter. You get radiators that drop in easily without the need for adjustments, additional brackets, or modifications of any kind. Denso radiators are dependable, lightweight, and made to last. An investment in a Denso radiator will pay dividends in the long run.. Features and benefits of Denso radiators include: * First Time Fit design—precision-built to provide the right part, the right fit, the first time * Plastic tanks with aluminum or copper cores * Superior fin waves provide higher heat transfer * Available in cross-flow and down-flow configurations * Thin-tube construction assures maximum cooling efficiency

4.51 out of 5 stars ( 84 )

$148.99

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