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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Rein Coolant Expansion Tank - E46, E53, E83
Rein Coolant Expansion Tank - E46, E53, E83
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Rein - Corporate Logo
T#:402141
Part#: 17117573781
In Stock
$ 76.39 USD
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$ 76.39 USD
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Includes cap and level sensor
BMW N62 N62TU AGA Tools coolant pipe
BMW N62 N62TU AGA Tools coolant pipe
AGA Tools - Corporate Logo
T#:5663672
Part#: AGA-N62-6061
In Stock
$ 560.99 USD
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$ 560.99 USD
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Replace the factory piece that is prone to failure.
OEM Rein Upper Radiator Hose - E53 X5 N62 4.4L 4.8L
OEM Rein Upper Radiator Hose - E53 X5 N62 4.4L 4.8L
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:362526
Part#: 17127526856
Ships in 1 Business Day
$ 83.99 USD
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$ 83.99 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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Coolant Expansion Tank
Coolant Expansion Tank
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Rein - Corporate Logo
T#:591949
Part#: 17107514964
Back Ordered
$ 80.99 USD
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$ 80.99 USD
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Includes bleeder screw
Rein Lower Radiator Hose - E53 X5 N62 4.4L 4.8L
Rein Lower Radiator Hose - E53 X5 N62 4.4L 4.8L
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:362530
Part#: 17127509963
Ships in 3 Business Days
$ 51.38

This product was last offered at the strikethrough price on
04-15-2026

$ 43.99 USD
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$ 43.99 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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OEM Rein Upper Radiator Hose - E53 X5 M62 4.4L 4.6L
OEM Rein Upper Radiator Hose - E53 X5 M62 4.4L 4.6L
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:379731
Part#: 11537500746
In Stock at Vendor
$ 64.99 USD
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$ 64.99 USD
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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

This item fits the following BMWs: 
2000-2003 E53 BMW X5 4.4i 4.6is

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Expansion Tank
Expansion Tank
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Rein - Corporate Logo
T#:592015
Part#: 17137501959
Ships in 2 Business Days
$ 74.99 USD
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$ 74.99 USD
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Includes vent screw and leveling switch
Thermostat With Housing
Thermostat With Housing
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:582356
Part#: 11537509227
Ships in 3 Business Days
$ 89.99 USD
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$ 89.99 USD
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Stop leaks before they start with this new Thermostat With Housing from Rein.
Meyle Water Pump - M62
Meyle Water Pump - M62
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:579328
Part#: 11510393336
Ships on Nov 27, 2026
$ 106.99 USD
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$ 106.99 USD
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Don't take your car's cooling system for granted. A waterpump failure can cost you an engine, which is why preventatively replacing your BMWs waterpump and refreshing the cooling system every 60,000 miles. The water pump is a weak point is the cooling system. Replacing your waterpump will go a long way for keeping your car on the road and operating properly.
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Expansion Tank Mounting Plate
Expansion Tank Mounting Plate
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:591946
Part#: 17101439110
Ships in 3 Business Days
$ 80.99 USD
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$ 80.99 USD
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