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BMW Cooling System Parts & Accessories for BMW X Series E53 (2000-2006)

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The cooling system is arguably the weakest point in numerous BMWs. If you drive an aging BMW or plan on taking your car to the track like we do, we recommend beefing up your cooling system before going to the track. Generally, the main components in your cooling system that are prone to failure include the following: expansion tank, factory hoses, water pump, thermostat, fan (especially if your vehicle comes factory with a clutch fan), and radiator. Factory BMW expansion tanks are plastic and prone to either breaking off at connection points or combusting. As factory rubber hoses age they either crack or break over time - we offer silicone cooling hose upgrades for most applications to avoid future failures. If you have an older vehicle, your water pump likely comes from the factory with a plastic impeller - we offer upgraded water pumps with metal impellers that are far more reliable. Newer model BMWs utilize electric water pumps - BMW spent millions of dollars engineering these water pumps, but they fail so often that we recommend replacing at 60,000 mile service intervals to avoid being stranded on the side of the road. In terms of thermostats, we offer various upgraded thermostats for racing applications. If your BMW utilizes a clutch fan from the factory, we have several options available in terms of universal electric fans - we recommend replacing these to avoid sending brittle plastic fan blades through your hood. For radiators, we recommend swapping out your radiator for one that does not use plastic connection points like your factory radiator.

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OEM Rein Expansion Tank Hose - E53 X5 N62 4.4L 4.8L

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T#:379797

Part#: 17127509966

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$ 32.99 USD

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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

Fits the following BMWs:
2003+ E53 BMW X5 N62 4.4L 4.8L

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16" Fan shroud gasket

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T#:598825

Part#: 30130074

In Stock at Vendor

$ 17.99 USD

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Provides .25" stand off from radiator, does not work with high output fans.

OEM Rein Heater Coolant Hose - E53

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T#:12845

Part#: 64218409063

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$ 10.99 USD

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$ 10.99 USD

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Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.

URO Thermostat Housing Gasket - BMW M52TU M54

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T#:639269

Part#: 11537509357

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$ 2.99 USD

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$ 2.99 USD

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Prevent leaks with a brand new thermostat housing gasket from URO

Expansion Tank With Cap

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T#:46616025

Part#: EPK0138

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$ 71.99 USD

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The coolant expansion tank allows excess coolant to flow in and out as temperatures rise and fall. Over time, repeated exposure to extreme temperature changes can cause the tank to crack, split, or break. To keep your cooling system sealed and functioning properly, any tank showing signs of damage—such as cracks, broken nipples, or compromised mounting points—should be replaced.

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OEM Nissens Radiator - Automatic - E53 X5 3.0i M54

For vehicles with automatic transmission only

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For vehicles with automatic transmission only

T#:583902

Part#: 17107544668

Ships in 7 Business Days

$ 294.25

This product was last offered at the strikethrough price on
12-15-2025

$ 255.99 USD

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$ 255.99 USD

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OEM Nissens brand replacement radiator for all 2000-2006 E53 X5 3.0i with Automatic Transmission. This radiator is made by Nissens, an original equipment (OE) supplier to BMW. This item fits the following BMWs: 2000-2006 E53 BMW X5 3.0i

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BMW Radiator Hose Kit - 17127509963

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T#:46719193

Part#: CHK0032P

Ships in 4 Business Days

$ 76.99 USD

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Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.

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Genuine BMW Radiator Hose - Lower - E53 M62 4.4L 4.6L

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T#:6981

Part#: 11537500750

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12% off MSRP $ 102.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 90.99 USD

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12% off MSRP

$ 102.99

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$ 90.99 USD

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Genuine BMW Water Hose -
This item fits the following BMW Chassis:
E53 X5

Fits BMW Engines including:
M62

Radiator Bracket - Front - E53

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T#:45664

Part#: 17111439118

Ships in 1-2 days

7% off MSRP $ 28.99

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$ 26.99 USD

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7% off MSRP

$ 28.99

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$ 26.99 USD

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Genuine BMW Bracket F.Radiator
This item fits the following BMW Chassis:
E53 48IS,E53 X5 X5

Fits BMW Engines including:
M54,M62,N62

Genuine BMW Transmission Cooler Thermostat - E53 X5 N62 M62

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T#:367896

Part#: 17107559966

Ships in 1-2 days

12% off MSRP $ 108.99

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$ 95.99 USD

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12% off MSRP

$ 108.99

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$ 95.99 USD

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Mahle-Behr Radiator Drain Plug - E53, E70

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T#:362776

Part#: 17117571988

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$ 10.99 USD

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$ 10.99 USD

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Used to drain the radiator

Thermostat Housing Gasket

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T#:367704

Part#: 11537509357

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14% off MSRP $ 9.74

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$ 8.33 USD

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$ 9.74

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$ 8.33 USD

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Needs to be replaced once removed

O-RING

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T#:580584

Part#: C32348

In Stock

$ 3.99

This product was last offered at the strikethrough price on
05-07-2026

$ 2.99 USD

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$ 2.99 USD

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Adjust-Lever - E31, E38, E39, E53

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T#:33632

Part#: 11281745904

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5% off MSRP $ 56.99

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$ 53.99 USD

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$ 56.99

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Genuine BMW Adjust-Lever -
This item fits the following BMW Chassis:
E38,E39,E53 X5

Fits BMW Engines including:
M62

Hose Clamp 2 5/16" - 3 1/4" - priced each

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T#:376806

Part#: 54155K23

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$ 4.99 USD

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$ 4.99 USD

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Hose Clamp 2 5/16" - 3 1/4"

Ensure secure hose connections with the Hose Clamp 2 5/16" - 3 1/4", a versatile and reliable solution for various applications. Crafted from durable materials, this clamp offers superior strength and corrosion resistance. Its adjustable design allows for a snug fit, reducing the risk of leaks and ensuring optimal performance. Upgrade your hose connections with the precision and reliability of the Hose Clamp 2 5/16" - 3 1/4".

Versatile and reliable solution for various applications
Superior strength and corrosion resistance
Adjustable design for a snug fit
Reduces risk of leaks for optimal performance

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Genuine BMW Auxiliary Water Pump Hose - E53 X5 M62 4.4L 4.6L ...

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T#:35992

Part#: 11537505949

Ships in 1-2 days

12% off MSRP $ 141.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 124.99 USD

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12% off MSRP

$ 141.99

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$ 124.99 USD

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Genuine BMW Water Hose -
This item fits the following BMW Chassis:
E53 X5

Fits BMW Engines including:
M62

Genuine BMW Radiator Air Duct - Right - E53 X5 M54 3.0L

For vehicles with production date up to 10/2003

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T#:118601

Part#: 51718264182

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6% off MSRP $ 124.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 116.99 USD

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6% off MSRP

$ 124.99

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$ 116.99 USD

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Genuine BMW Air Duct Front Right -
This item fits the following BMW Chassis:
E53 X5

Genuine BMW - Level 1 Thermostat Replacement Kit- M62TU

For vehicles with production date from 09/1998

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T#:374624

Part#: 11531436386KT

Ships in 1-2 days

$ 232.99

This product was last offered at the strikethrough price on
06-02-2026

$ 230.99 USD

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$ 230.99 USD

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Genuine BMW - Level 2 Cooling System Refresh Kit + Belts - E53 M54 ...

For vehicles with production date up to 09/2002

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T#:574230

Part#: ECSE531711-2

Ships in 1-2 days

$ 1,119.99

This product was last offered at the strikethrough price on
06-02-2026

$ 1,117.99 USD

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$ 1,117.99 USD

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A Level 2 kit that includes belt service components

Bracket Pressure Pipe Airconditioner - E39, E53, E82, E88, E90, E91, ...

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T#:152356

Part#: 64538369549

Ships in 3 Business Days

$ 6.99 USD

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$ 6.99 USD

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Genuine BMW Bracket Pressure Pipe Airconditioner
This item fits the following BMW Chassis:
E39 M5,E53 48IS,E39,E53 X5,E82,E85 Z4,E90,E92,E93

Genuine BMW Radiator Air Duct - E53 X5

For vehicles with production date up to 10/2003

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T#:118713

Part#: 51718402420

Ships in 4 Business Days

7% off MSRP $ 57.99

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$ 53.99 USD

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7% off MSRP

$ 57.99

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$ 53.99 USD

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Genuine BMW Air Duct, Radiator
This item fits the following BMW Chassis:
E53 48IS,E53 X5

Genuine BMW Upper Sealing Gasket - E53 X5

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T#:45555

Part#: 17101439129

Ships in 4 Business Days

7% off MSRP $ 28.99

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$ 26.99 USD

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$ 28.99

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$ 26.99 USD

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Genuine BMW Sealing, Module Carrier
This item fits the following BMW Chassis:
E53 48IS,E53 X5 X5

Fits BMW Engines including:
M54,M62,N62

Victor Reinz Water Pump Gasket - E31, E32, E34, E38, E39, E53 ...

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T#:376106

Part#: 11511731372

Ships in 7 Business Days

$ 7.13 USD

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$ 7.13 USD

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Should be replaced each time the water pump is removed

Pusher Fan Assembly

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T#:368762

Part#: 64546921381

Ships in 7 Business Days

9% off MSRP $ 826.99

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$ 751.99 USD

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9% off MSRP

$ 826.99

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$ 751.99 USD

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Radiator

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T#:367895

Part#: 17107544668

Ships in 7 Business Days

4% off MSRP $ 652.99

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$ 626.99 USD

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4% off MSRP

$ 652.99

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$ 626.99 USD

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Genuine BMW Additional Water Pump - E53 X5 M62/N62

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T#:7292054

Part#: 64116954987

Ships in 7 Business Days

9% off MSRP $ 270.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 245.99 USD

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9% off MSRP

$ 270.99

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$ 245.99 USD

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Thermostat With Housing - 105C

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T#:15511816

Part#: 11531436386

Ships in 9 Business Days

Sale - Save 4% $ 30.99

This product was last offered at the strikethrough price on
05-03-2026

$ 29.67 USD

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Sale - Save 4%

$ 30.99

This product was last offered at the strikethrough price on
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$ 29.67 USD

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A thermostat that opens sooner promotes better cooling in your vehicle. Running a lower temperature thermostat will keep everything much cooler. Keeping the engine cooler will help reduce and improve the life of the seals in your engine, saving you time and money, while also help increase engine performance. A tune might be required to gain the most from this modification, as well as to get your car's ECU accustomed to seeing lower temperatures.

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Anti-Freeze Tester

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T#:641679

Part#: CTAA195

Ships on Jun 19, 2026

$ 9.98 USD

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$ 9.98 USD

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Tests all ethylene glycol solutions with radiator hot or cold

Gates Water Valve - E53, E70, E71, F15, F16 , F85, F86

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T#:553629

Part#: 64116910544

Ships on Jun 23, 2026

$ 280.00 USD

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$ 280.00 USD

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With additional water pump

BMW Radiator Expansion Tank Pressure Fitting

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Requires the use of a Motive Power Bleeder, sold separately

T#:380462

Part#: 1175

Ships on Jun 26, 2026

$ 24.99 USD

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$ 24.99 USD

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Allows you to check for leaks in the coolant system

Thermostat - 105C

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T#:15511827

Part#: 11537502779

Ships on Jun 26, 2026

Sale - Save 3% $ 46.99

This product was last offered at the strikethrough price on
05-03-2026

$ 45.58 USD

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Sale - Save 3%

$ 46.99

This product was last offered at the strikethrough price on
05-03-2026

$ 45.58 USD

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If your vehicle is experiencing cooling issues, chances are the thermostat is the cause. Common symptoms include prolonged warm-up at highway speeds from the thermostat being stuck open, or consistent overheating issues from the thermostat being stuck in the closed position. Either condition can result in poor performance, and potential damage to vital components in your vehicle.

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Radiator Cooling Fan Assembly

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T#:3077082

Part#: 17427521767

Special Order: No Guaranteed ETA

$ 857.99 USD

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$ 857.99 USD

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This is an entire electric fan assembly that includes both the fan motor itself as well as the fan blade.

Pusher Fan Assembly - E53 X5

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T#:3077101

Part#: 64546921381

Special Order: No Guaranteed ETA

$ 414.99 USD

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$ 414.99 USD

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Replacement Auxiliary Fan Assembly With Shroud from VDO

Bav Auto Coolant Expansion Tank - E53 X5, Z3 2.3 2.5i 2.8 3.0i ...

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T#:640497

Part#: 17107514964

Ships on Jun 25, 2026

Sale - Save 16% $ 63.99

This product was last offered at the strikethrough price on
05-03-2026

$ 53.75 USD

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Sale - Save 16%

$ 63.99

This product was last offered at the strikethrough price on
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$ 53.75 USD

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This radiator expansion tank is used on E53 X5 4.4i and 4.6is with M62 engine, and Z3 2.3 2.5i 2.8 3.0i from 1999-2002. It is a common failure item as the plastic weakens over time and stress cracks will lead to coolant leaks. We have found that the expansion tanks should be replaced based on age as well as condition. Expansion tanks seem to have a lifespan of less than six years before they show signs of fatigue and wear. Pre-emptively replacing the expansion tank as part of an overall maintenance plan can prevent you from getting stranded from a sudden failure later on. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Bracket - Fan Housing - E53

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T#:45872

Part#: 17117505344

Special Order: No Guaranteed ETA

7% off MSRP $ 29.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 27.99 USD

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7% off MSRP

$ 29.99

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$ 27.99 USD

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Genuine BMW Bracket, Fan Housing
This item fits the following BMW Chassis:
E53 48IS,E53 X5 X5

Fits BMW Engines including:
M54,M62,N62

Elring Thermostat Gasket - BMW M60 M62 M70 S70

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T#:45005599

Part#: 818.437

Special Order: No Guaranteed ETA

$ 2.99 USD

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$ 2.99 USD

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This rubber gasket seals the junction between the thermostat and water pump Measurements: 4.0x76.5mm

Engine Water Pump Gasket Kit

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T#:54317216

Part#: 359.200

Special Order: No Guaranteed ETA

$ 12.99 USD

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$ 12.99 USD

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This Elring water pump gasket set is the perfect solution for refreshing your BMW's cooling circuit during a water pump service or cooling system overhaul.

Bremmen Engine Fan Blade - 11 Blades, 420mm - BMW M30 S38 M50 M52 S5...

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T#:640149

Part#: 11521712058

Ships on Jul 27, 2026

Sale - Save 22% $ 23.99

This product was last offered at the strikethrough price on
05-03-2026

$ 18.76 USD

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Sale - Save 22%

$ 23.99

This product was last offered at the strikethrough price on
05-03-2026

$ 18.76 USD

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This fan is driven by the serpentine belt, engaged by the fan clutch. If you have bad motor mounts, it's quite common for the blades of this fan to make contact with the radiator or radiator shroud, essentially self-destructing the fan into many pieces. Be sure to get a new fan clutch, while you are replacing this.

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2 Pin Connector

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T#:33412932

Part#: 61132359999

Ships on Jul 28, 2026

Sale - Save 25% $ 10.99

This product was last offered at the strikethrough price on
05-03-2026

$ 8.24 USD

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Sale - Save 25%

$ 10.99

This product was last offered at the strikethrough price on
05-03-2026

$ 8.24 USD

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Includes connector housing with terminals and seals. Commonly used for the coolant level sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 61132359999 - Commonly used for the coolant level sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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BMW Oil Cooler

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T#:38385318

Part#: 17101439112

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$ 87.99 USD

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$ 87.99 USD

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The heat exchanger regulates engine oil temperature to prevent overheating, reducing the risk of oil breakdown and potential internal engine damage.

BMW Coolant Flange

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T#:17339424

Part#: 17107500745

Special Order: No Guaranteed ETA

$ 30.99 USD

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$ 30.99 USD

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The piece connects the cooling hoses to the expansion tank. Usually broken when trying to remove the hoses from the connections.

Coolant Temperature Sensor

Located on water pump housing

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T#:594615

Part#: 13621703993

Special Order: No Guaranteed ETA

$ 18.99 USD

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$ 18.99 USD

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This is the coolant temperature sensor used in many BMW models from the mid-1990s to the mid-2000s. The engine computer relies on the coolant temp to set the fuel mapping for the engine. As the car warms up the computer changes the fuel mixture. If your car is running a bit rich (too much fuel) it could be because this sensor is failing and not sending the correct info to the computer.

This sensor is located in a variety of places depending on the engine. But it's one of those easy replacement items 'while you're in there' when doing a water pump or thermostat replacement.

This coolant temp sensor fits the following BMWs:
1996-1999 E36 BMW 323is 323ic 328i 328is 328ic M3, located in cylinder head
1999-2003 E39 BMW 540i, located on side of water pump
1999-2001 E38 BMW 740i 740il, located on side of water pump
1995-1996 E38 BMW 750il, located on side of water pump
1990-1999 E31 BMW 850i 850ci, located on side of water pump
2000-2006 E53 BMW X5 3.0i, located in cylinder head
2000-2006 E53 BMW X5 4.4i/4.6is/4.8is, located on side of water pump
1997-2002 Z3 BMW Z3 2.5i Z3 3.0i, located in cylinder head

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Fluid Level Sensor

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T#:5973204

Part#: 17117546548

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$ 13.99 USD

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MEYLE-ORIGINAL: True to OE fluid level sensor. Used in multiple locations. Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles. Comparable OE Cross Reference - 17117546548

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Auxillary Fan Switch

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T#:4934936

Part#: 3148210000

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$ 18.99 USD

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The auxiliary fan switch activates the auxiliary cooling fan to provide additional cooling under high heat loads, and when the car is stationary. Also known as the coolant temperature sending unit, comes with related o-ring

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Meyle Engine Coolant Thermostat - BMW FXX, GXX

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T#:52797701

Part#: 3282280016

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$ 47.99 USD

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This MEYLE thermostat ensures your engine stays at the perfect temperature for efficiency and power.

URO Air Temperature Sensor - BMW X5 M5 525i 528i 530i 540i

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T#:592644

Part#: 64118391392

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$ 7.99 USD

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URO Parts is one of the leading manufacturers of high quality direct replacement aftermarket components, covering a wide range of makes and models. All of their replacement parts are manufactured to ISO 9000 certification standards, so you can expect long lasting performance from URO Parts.

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Bremmen Parts Auxiliary Water Pump Hose - E53

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T#:1195928

Part#: 11537505949

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Sale - Save 3% $ 110.15

This product was last offered at the strikethrough price on
05-03-2026

$ 106.85 USD

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Sale - Save 3%

$ 110.15

This product was last offered at the strikethrough price on
05-03-2026

$ 106.85 USD

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Used for the additional water pump

Rein Coolant Return Pipe - N62 N73

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T#:386411

Part#: 11511439976

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$ 14.99 USD

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This is the coolant return pipe on the back of the water pump on the N62 and N73 engines used in the E53 X5, E60 545/550, E63 645/650, E65 745/750, E70 X5, and F02 750. This pipe connects the water pump to the valley pan and it's a compression fitting (no o-rings). Whenever the water pump or valley pan are replaced this tube should also be replaced. This is one area where you don't want to go back and re-do your work because of a leaking fitting! In German, Rein means Pure. In the automotive industry the Rein name has quickly come to represent quality. With fitments for some of the worldaEURtms finest automobiles including BMW and Mini and guaranteed OE quality, Rein is a name you can trust.

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Radiator Support Bracket

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T#:14122755

Part#: 17117514402

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$ 8.99 USD

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Mounts to top of radiator bracket, 2 per vehicle.

Auxiliary Fan Switch

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T#:376847

Part#: 13621433077

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$ 10.99 USD

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Comes with related o-ring

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