Rein BMW Cooling System Parts & Accessories for BMW X Series E70 (2007-2013)

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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 Aluminum Coolant Flange - BMW M57 3.0L
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T#:45791752
Part#: 11127806196
In Stock
$ 69.99

This product was last offered at the strikethrough price on
03-08-2026

$ 58.99 USD
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$ 58.99 USD
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Plastic coolant flanges become brittle over time, leading to cracks and coolant leaks. Upgrade to an aluminum flange to avoid this issue altogether!
OEM Rein Lower Coolant Hose - N63 4.4L
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T#:554681
Part#: 17127575427
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$ 51.99 USD
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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

Fits the following engines:
N63 4.4L

Rein Water Hose With Gasket - Water Pump To Engine Inlet
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T#:17804808
Part#: 11537584630R
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$ 40.99 USD
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Rein OE quality water hoses are designed to be direct replacements for OE hoses and assemblies. This includes the hose and clamps.

OEM Rein Vent Hose - N63 4.4L
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T#:554680
Part#: 17127576363
Ships in 1 Business Day
$ 26.99 USD
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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

Fits the following engines:
N63 4.4L


Rein Coolant Line - E70
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T#:592002
Part#: 17127536235
In Stock
$ 30.99 USD
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Connects to the bottom of the expansion tank
Upper Radiator Hose
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T#:599684
Part#: 17127586774
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$ 42.99 USD
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OEM Rein Radiator Feed Hose - E70 X5
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T#:583608
Part#: 17127536231
Ships in 3 Business Days
$ 62.99 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.
Lower Radiator Hose
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T#:594367
Part#: 17127578703
In Stock at Vendor
$ 40.99 USD
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Replace your swollen or leaking hose.

Rein Coolant Expansion Tank - E70
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T#:592030
Part#: 17138621092
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$ 100.99 USD
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$ 100.99 USD
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Replace your cracked or faded tank

Rein Thermostat With Housing 88C - E70, E90
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T#:555019
Part#: 11517805811
Ships in 3 Business Days
$ 63.99 USD
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Rein Thermostat With Housing 88C is designed to maintain precise engine temperature control in your vehicle's cooling system. This premium thermostat, featuring an 88°C temperature rating, ensures optimal cooling performance by regulating coolant flow, preventing overheating, and enhancing overall engine efficiency. Built with a durable housing, this thermostat is an ideal replacement for your factory part, offering reliable fitment and long-lasting performance.

Available at Turner Motorsport, the Rein Thermostat With Housing 88C is engineered to withstand extreme conditions, ensuring consistent operation even under heavy loads. This OE-quality component is a must-have for maintaining your car’s peak performance and fuel efficiency.

  • 88°C thermostat for precise engine temperature regulation
  • Integrated housing for easy installation and superior durability
  • Prevents engine overheating and improves cooling system efficiency
  • Designed for a direct fit and easy replacement
  • Available at Turner Motorsport, your trusted source for automotive parts

Upgrade your vehicle’s cooling system with the Rein Thermostat With Housing 88C and enjoy enhanced engine performance and longevity.

In German, Rein means Pure. In the automotive industry the Rein name has quickly come to represent quality. With fitments for some of the world’s finest automobiles including BMW and Mini and guaranteed OE quality, Rein is a name you can trust.

Includes gasket and O-rings

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Rein Radiator Hose - E70 X5
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T#:388766
Part#: 17127536230
In Stock at Vendor
$ 67.99 USD
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$ 67.99 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.
Rein Water Pump - N63 S63
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T#:393385
Part#: 11517548263
Back Ordered
$ 215.99 USD
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$ 215.99 USD
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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. Replace your water pump with Rein to get your cooling system back in check.
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Water Hose - Thermostat Housing To Water Pump
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T#:599691
Part#: 11537584543
In Stock at Vendor
$ 37.99 USD
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This short curved coolant hose connects from the aux water pump near the transmission.
Rein Cooling O-Ring - E53, E60, E63, E64, E65, E66, E70
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T#:362446
Part#: 11531710048
In Stock
$ 4.07 USD
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Seals the rear of the water transfer pipe to the block
Intercooler Expansion Tank
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T#:584477
Part#: 17137647281
In Stock
$ 71.99 USD
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$ 71.99 USD
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Rein Coolant Hose - E60, E61, E70, E82, E83, E88, E90, E91, E92, E93,...
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T#:348982
Part#: 11537521049
In Stock
$ 17.99 USD
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Connects from the water pump to the thermostat

Rein Coolant Hose - E70
For vehicles with production date up to 12/2009
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T#:591811
Part#: 11537547244
Ships in 3 Business Days
$ 40.99 USD
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$ 40.99 USD
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Coolant hose that runs from the inlet to thermostat
Water Hose With O-Ring - Cylinder Head To Thermostat Housing ...
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T#:594303
Part#: 11537585023
Ships in 3 Business Days
$ 30.11 USD
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Replacement Water Hose from Rein

Rein Coolant Expansion Tank - E70
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T#:592023
Part#: 17137647290
Ships in 3 Business Days
$ 85.99 USD
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$ 85.99 USD
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Plastic expansion tanks have a limited lifespan - replace every 80,000 miles
Coolant Vent Pipe
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T#:594319
Part#: 17127555290
Ships in 3 Business Days
$ 27.99 USD
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Prevents over-pressurization

OEM Rein Lower Radiator Coolant Hose - E70 E71 F15 F16 N63
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T#:17738371
Part#: 17127576358
In Stock at Vendor
$ 72.99 USD
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Rein Coolant Hose CHK0722 is a high-performance replacement hose that connects the lower radiator to the water pump.

Rein Water Pump to Thermostat Hose - E70
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T#:591813
Part#: 11537550062
Ships in 3 Business Days
$ 41.99 USD
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Replace your leaking hose with this direct-fit option from Rein
OEM Rein Oil Cooler Coolant Hose - E70 X5 xDrive30i
For vehicles with production date from 12/2009 or vehicles with updated radiator design...
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T#:583589
Part#: 11537609944
Ships in 3 Business Days
$ 33.99 USD
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$ 33.99 USD
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Coolant hose that runs from the inlet to thermostat. 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.
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Water Pump
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T#:46478542
Part#: WPR0046
Ships in 3 Business Days
$ 795.99 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. This water pump fits many 2006 and newer BMW 6 cylinder engines, specifically all the BMWs with the N51, N52, N53 engines. You will also need to purchase replacement aluminum screws Part #11510392553
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Coolant Vent Hose
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T#:593064
Part#: 17127536236
Ships in 3 Business Days
$ 27.99 USD
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Rein Thermostat - E70, E71
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T#:403980
Part#: 11537550172
Ships in 1 Business Day
$ 67.99 USD
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Replaces failed thermostat or as preventative maintenance for your cooling system
Rein Expansion Tank Cap
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T#:384807
Part#: 17117639021
In Stock
$ 16.99 USD
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Cap for plastic expansion tank

BMW Radiator Hose Kit - 17127536231
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T#:46719187
Part#: CHK0373R
Ships in 3 Business Days
$ 66.99 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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Rein Water Hose - Water Hose To Thermostat Inlet
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T#:17738370
Part#: 11537589949
Ships in 3 Business Days
$ 45.99 USD
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Prevents leaks and comebacks from reusing old quick connects and o-rings.
Rein Water Hose With Metal Flange - E70, E71 - N55, N54
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T#:53750149
Part#: CHU0633
Ships in 3 Business Days
New Item
$ 56.99 USD
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Heat cycles cause Cracking and Leaks on Rubber and Plastic Components. Replace Leaking Hose with this Part From Rein Featuring Upgraded Metal Flanges

Water Pump Service Kit
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T#:38161728
Part#: 11515A05704
Ships on Jun 19, 2026
$ 749.99 USD
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Rein Coolant Return Pipe - N62 N73
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T#:386411
Part#: 11511439976
Special Order: No Guaranteed ETA
$ 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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