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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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Coolant Return Line

2X Entries Into Our F80 M3 Sweepstakes

T#:53856300

Part#: 11538650087

In Stock at Vendor

$ 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 Bosch Charge Air Cooler Water Pump

T#:54744791

Part#: 039202411C

Ships in 1 Business Day

$ 168.99

This product was last offered at the strikethrough price on
09-09-2026

$ 149.99 USD

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$ 149.99 USD

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Coolant pump for the charge air cooling system.

URO Turbo Coolant Return Line - BMW Gen1 B58 3.0L

2X Entries Into Our F80 M3 Sweepstakes

T#:53079363

Part#: 11538666857

In Stock

$ 65.99 USD

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$ 65.99 USD

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Replacement coolant return hose running from the turbocharger to the auxiliary water pump.

CSF Universal Large Single-Pass Oil Cooler - Universal Application ...

2X Entries Into Our F80 M3 Sweepstakes
Universal fitment design - modifications may be necessary to run this cooler

T#:53608839

Part#: 8371

Ships in 3 Business Days

$ 499.00 USD

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$ 499.00 USD

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CSF redesigned this cooler and went with a more traditional inlet/outlet orientation. The new single pass design features high efficiency and high durability, but with vertically oriented inlet and outlet connections.

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Rein Turbocharger Coolant Supply Line - BMW B58 Gen2

2X Entries Into Our F80 M3 Sweepstakes

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

Vargas Billet Coolant Block-Off - BMW B58 Engine

2X Entries Into Our F80 M3 Sweepstakes

T#:52094566

Part#: VTTFAB040BLKB58

Ships in 10 Business Days

$ 31.99 USD

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$ 31.99 USD

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Engineered for precision and durability, the VTT-FAB-040 B58 Block-Off Flange is the definitive solution for managing oil and coolant paths during fabrication.

Rein Lower Radiator Hose - G3x G1x

Electric Coolant Pump

2X Entries Into Our F80 M3 Sweepstakes

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

2X Entries Into Our F80 M3 Sweepstakes

T#:58563050

Part#: 17128602871

Ships in 3 Business Days

$ 64.99 USD

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$ 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

2X Entries Into Our F80 M3 Sweepstakes

T#:59038367

Part#: 17135A1BD89

Ships in 3 Business Days

$ 9.99 USD

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$ 9.99 USD

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Auxiliary Water Pump

T#:57231537

Part#: 039202411E

Special Order: No Guaranteed ETA

$ 239.99 USD

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$ 239.99 USD

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Maintain precise thermal management and protect critical engine components with this high-efficiency auxiliary water pump from Bosch.

Auxiliary Water Pump

T#:57231536

Part#: 039202410W

Special Order: No Guaranteed ETA

$ 241.99 USD

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$ 241.99 USD

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This Bosch Auxiliary Water Pump is built to deliver high-flow, continuous fluid movement through secondary cooling loops, keeping intercoolers cool and heat exchangers working at peak efficiency.

VEMO Electronic Thermostat And Coolant Distribution Module - BMW B58T...

For vehicles with the later B58C or B58D TU engine - Will not fit the B58A early engine

T#:52903296

Part#: V20-99-0005

Ships on Jan 14, 2027

$ 336.99

This product was last offered at the strikethrough price on
08-05-2026

$ 291.99 USD

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$ 291.99 USD

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An electronic thermostat that is controlled by the car's computer for optimal control over the engine and coolant temperature. Internal valves are opened and closed by the vehicle's DME/ECU to achieve specific temperature targets for optimal engine efficiency and performance.

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Coolant Expansion Tank

T#:56544005

Part#: 17139846642

Special Order: No Guaranteed ETA

$ 83.99 USD

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$ 83.99 USD

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Protect your modern BMW from catastrophic thermal overload with the Febi Bilstein coolant expansion tank.

Coolant Expansion Tank Cap

T#:56001934

Part#: 46221

Special Order: No Guaranteed ETA

$ 19.99 USD

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$ 19.99 USD

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This Febi Bilstein coolant expansion tank cap is designed to maintain the exact 1.4 bar pressure required to maximize your coolant's boiling point.

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

2X Entries Into Our F80 M3 Sweepstakes

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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Coolant Hose

2X Entries Into Our F80 M3 Sweepstakes

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.

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