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Rein BMW Cooling System Parts & Accessories for BMW G32 640i xDrive B58 3.0L

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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 Hose Metal Connector With Sensor - BMW F22/23 F3X B58 Ge...

For models with the earlier B58 Gen1 engine only - Not compatible with the later TU eng...

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T#:38789910

Part#: CHK0940

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$ 73.99 USD

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$ 73.99 USD

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The OE plastic connector is a frequent failure point due to brittleness and cracking caused by repeated thermal cycling and hydrolysis. Hydrolysis, the breakdown of plastic or rubber by water exposure, weakens the structure over time, leading to failure. To combat these issues, Rein’s upgraded connectors are constructed from high-strength aluminum, eliminating the vulnerabilities of plastic connectors and ensuring long-term durability.

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Rein Coolant Hose Aluminum Connector - BMW F22/23 F3X B58 Gen1 ...

For models with the earlier B58 Gen1 engine only - Not compatible with the later TU eng...

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T#:39059272

Part#: 11118619408

Back Ordered

$ 47.99 USD

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$ 47.99 USD

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The OE plastic connector is a frequent failure point due to brittleness and cracking caused by repeated thermal cycling and hydrolysis. OE+

Hydrolysis, the breakdown of plastic or rubber by water exposure, weakens the structure over time, leading to failure.

To combat these issues, Rein’s upgraded connectors are constructed from high-strength aluminum, eliminating the vulnerabilities of plastic connectors and ensuring long-term durability.

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Rein Aluminum Oil Filter Housing - BMW B58

For Pre-LCI models with the Gen1 B58 (B58A) engine only

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T#:49404665

Part#: 11428583901

In Stock

$ 450.00 USD

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$ 450.00 USD

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For those who push their engines to the limit, "good enough" is a liability. Upgrade to the Rein HEU0116 Aluminum Oil Filter Housing—the professional’s choice for durability and peace of mind.

Coolant Return Line

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T#:53856300

Part#: 11538650087

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$ 60.99 USD

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$ 60.99 USD

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Rein Automotive turbo hoses are engineered to meet these rigorous demands, providing the reliability required for both the track and the street.

OEM Rein Expansion Tank w/ Cap - G30 540iX, G32 640iX, G11 740i ...

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T#:33946948

Part#: 17139846642

In Stock

$ 99.65 USD

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$ 99.65 USD

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The Expansion Tank is an essential part of your vehicle’s cooling system, designed to accommodate the expansion of coolant as it heats up during engine operation. This high-quality tank helps regulate coolant pressure, preventing overheating and ensuring optimal engine performance. Built to meet or exceed OEM standards, this expansion tank is crafted from durable, heat-resistant materials to provide long-lasting reliability. It offers a direct fit for a wide range of European vehicles, ensuring easy installation.

Prevents Overheating: Manages coolant expansion to maintain consistent engine temperature.
Durable Construction: Made from premium, heat-resistant materials to ensure long-term durability.
OEM Quality Fit: Designed for a precise fit, meeting or exceeding original equipment specifications.
Leak-Proof Design: Provides a secure seal to prevent coolant loss and maintain system efficiency.
Easy Installation: Direct replacement part, compatible with a variety of European vehicle models.

Find the Rein Expansion Tank at Turner Motorsport for top-quality replacement parts and reliable performance.

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BMW Coolant Expansion Tank - 17139485733

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T#:45791753

Part#: 17139485733

In Stock at Vendor

$ 64.99

This product was last offered at the strikethrough price on
04-28-2026

$ 52.99 USD

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$ 52.99 USD

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Expansion tanks take constant abuse from high heat and harsh coolant, making them prone to cracking or failure over time. A damaged tank can quickly lead to overheating and serious engine damage, so replacement is critical at the first sign of trouble. Features: Direct fitment for hassle-free installation Precision-molded to OE specs for perfect sensor and hose connections Durable construction stands up to extreme heat and coolant chemicals Factory pressure-tested for reliable performance

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Rein Lower Radiator Hose - G3x G1x

Electric Coolant Pump

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T#:58489956

Part#: 17128602613

Ships in 3 Business Days

$ 44.99 USD

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$ 44.99 USD

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Protect your engine against thermal breakdown and maintain precise cooling system pressure with a Rein Lower Radiator Hose. Engineered as a direct fit replacement for degradation prone factory rubber hoses, this coolant line connects the lower radiator circuit to ensure steady fluid circulation under heavy driving conditions. Manufactured with high grade heat resistant EPDM rubber and OEM style quick connect fittings, it provides exceptional resistance to internal pressure spikes, ozone exposure, and chemical breakdown.

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Upper Radiator Coolant Hose

For vehicles manufactured before 2020 with the Gen 1 B58 engine

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T#:58563050

Part#: 17128602871

Ships in 3 Business Days

$ 64.99 USD

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Protect your engine against severe thermal breakdown and maintain precise cooling system pressure with a Rein Primary Upper Radiator Hose. Engineered as a direct fit replacement for degradation prone original equipment hoses, this upper radiator line transfers high temperature coolant straight to the primary radiator core. Manufactured with high grade heat resistant EPDM rubber and OEM style quick connect fittings, it provides exceptional resistance to internal pressure spikes, ozone degradation, and chemical breakdown under demanding driving conditions.

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Engine Coolant Expansion Tank Cap

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T#:59038367

Part#: 17135A1BD89

Ships in 3 Business Days

$ 9.99 USD

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$ 9.99 USD

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Coolant Hose

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T#:57616350

Part#: 11537643177

Back Ordered

$ 64.99 USD

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$ 64.99 USD

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Maintain maximum thermal efficiency on the track or the street with this precision-engineered turbocharger coolant line by Rein.

Rein Turbocharger Coolant Supply Line - BMW B58 Gen2

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T#:58307569

Part#: 11538650086

Ships in 3 Business Days

$ 72.00 USD

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$ 72.00 USD

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Supplies coolant to the turbocharger

Rein Turbo Coolant Hose - F22/23, F30/34, F32/33, F36, G01, G02, G11,...

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T#:53856297

Part#: 11538611277

Ships in 3 Business Days

$ 50.00 USD

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$ 50.00 USD

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Rein Automotive Turbo Hoses are engineered to meet these rigorous standards, utilizing premium, OE-quality materials specifically formulated to withstand the extreme duty cycles of modern forced-induction systems.

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