BMW Cooling System Parts & Accessories for BMW 5 Series G30 (2017+)

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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
Coolant Return Line
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:53856300
Part#: 11538650087
In Stock
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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 Bosch Charge Air Cooler Water Pump
OEM Bosch Charge Air Cooler Water Pump
Bosch - Corporate Logo
T#:54744791
Part#: 039202411C
Ships in 2 Business Days
New Item
$ 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.
Rein Engine Coolant Hose - BMW G11, G30 5
Rein Engine Coolant Hose - BMW G11, G30 5
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:52516262
Part#: CHE0993
Ships in 4 Business Days
New Item
$ 64.99 USD
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$ 64.99 USD
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Restore your cooling system’s integrity with the Rein CHE0993 Engine Coolant Hose.
URO Engine Coolant Hose - G30, G11
URO Engine Coolant Hose - G30, G11
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:54851969
Part#: 17128602870
Ships in 2 Business Days
New Item
$ 61.99 USD
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$ 61.99 USD
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On the track or the street, your cooling system is under constant abuse. A blown coolant hose can mean a cooked cylinder head and a ruined track day. When you're pushing your car to the limit, you need plumbing that can handle the heat.
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Rein Radiator Expansion Tank Hose - G30 B48 B58
Rein Radiator Expansion Tank Hose - G30 B48 B58
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:55821725
Part#: 17125A09423
In Stock at Vendor
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$ 18.99 USD
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$ 18.99 USD
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While the modern B48 and B58 powerplants are incredibly robust, BMW’s choice of brittle plastics for their cooling loops remains a major weak link. This upper radiator vent hose runs constantly hot as it returns pressurized coolant back to the expansion tank. After years of being baked by engine bay heat, the thin plastic neck and internal quick-disconnect seals degrade. A hardened factory plastic line can snap at any moment, spraying coolant everywhere.
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URO Expansion Tank Hose - G11 G30
URO Expansion Tank Hose - G11 G30
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:56760944
Part#: 17128602602
Ships in 2 Business Days
New Item
$ 65.99 USD
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$ 65.99 USD
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This URO Parts Coolant Hose replaces brittle or leaking factory lines connecting the expansion tank to the auxiliary water pump and thermostat on B46/B48 powered G-chassis BMWs. Manufactured with reinforced rubber and robust end connections, it restores proper fluid circulation, withstands high operating pressures, and keeps your cooling system operating reliably under daily and hard driving conditions.
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Rein Engine Coolant Hose - Upper Radiator To Expansion Tank - BMW G3X 5, 6, 7 ser.
Rein Engine Coolant Hose - Upper Radiator To Expansion Tank - BMW G3X...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:52903294
Part#: 17129844478
Back Ordered
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$ 49.99 USD
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$ 49.99 USD
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Upgrade your cooling system with the Rein Automotive replacement coolant hose, engineered to meet or exceed the rigorous standards of your BMW.
Rein Thermostat Assembly - F Chassis, G-Chassis - B48
Rein Thermostat Assembly - F Chassis, G-Chassis - B48
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:53891628
Part#: 11537644811
Ships in 4 Business Days
New Item
$ 322.99

This product was last offered at the strikethrough price on
06-10-2026

$ 288.99 USD
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$ 288.99 USD
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Whether you're managing a fleet of "spirited" daily drivers or prepping a chassis for the circuit, the Rein CTA0079 offers the peace of mind that comes with OE-quality engineering.
URO Turbo Coolant Return Line - BMW Gen1 B58 3.0L
URO Turbo Coolant Return Line - BMW Gen1 B58 3.0L
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:53079363
Part#: 11538666857
In Stock
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$ 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.
Rein Lower Radiator Hose - G30 G11 G14 G15 G16 - N63
Rein Lower Radiator Hose - G30 G11 G14 G15 G16 - N63
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:55857776
Part#: 17128602669
Ships in 4 Business Days
New Item
$ 49.99 USD
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$ 49.99 USD
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When it comes to keeping your vehicle on the road, a compromised cooling system is a severe vulnerability. Plastic and rubber degrade from constant heat cycling, leading to hairline cracks, swelling, and sudden failure.
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Rein Engine Coolant Reservoir - BMW G1X, G3X
Rein Engine Coolant Reservoir - BMW G1X, G3X
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:52516268
Part#: EPT0274
Back Ordered
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$ 114.99 USD
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$ 114.99 USD
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Protect your BMW investment with the Rein EPT0274 Engine Coolant Reservoir, the professional’s choice for cooling system restoration.
Coolant Hose
Coolant Hose
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:57616350
Part#: 11537643177
Ships in 4 Business Days
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$ 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.
Auxiliary Water Pump
Auxiliary Water Pump
Bosch - Corporate Logo
T#:57231536
Part#: 039202410W
Special Order: No Guaranteed ETA
New Item
$ 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.
Auxiliary Water Pump
Auxiliary Water Pump
Bosch - Corporate Logo
T#:57231537
Part#: 039202411E
Special Order: No Guaranteed ETA
New Item
$ 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.
VEMO Electronic Thermostat And Coolant Distribution Module - BMW B58TU (B58D vs B58C)
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
Vemo - Corporate Logo
T#:52903296
Part#: V20-99-0005
Ships on Oct 15, 2026
New Item
$ 336.99

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

$ 299.99 USD
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$ 299.99 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
Coolant Expansion Tank
Febi - Corporate Logo
T#:56544005
Part#: 17139846642
Special Order: No Guaranteed ETA
New Item
$ 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
Coolant Expansion Tank Cap
Febi - Corporate Logo
T#:56001934
Part#: 46221
Special Order: No Guaranteed ETA
New Item
$ 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.
Water Pump With Belt Pulley & Seals
Water Pump With Belt Pulley & Seals
Febi - Corporate Logo
T#:56507841
Part#: 11518638026
Special Order: No Guaranteed ETA
New Item
$ 121.99 USD
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$ 121.99 USD
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Engineered for ultimate durability, the Febi Bilstein replacement switchable water pump is built to protect your BMW’s B46 or B48 power plant.
B58 Upgraded Mechanical Water Pump
B58 Upgraded Mechanical Water Pump
For vehicles with the Gen1 B58 (B58A) engine only - Not compatible with the B58TU (B58D...
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:56760924
Part#: 11518632585M
Ships on Dec 14, 2026
New Item
$ 89.99 USD
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$ 89.99 USD
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Mechanical Water Pump
Mechanical Water Pump
For model years 2017-2019
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:57086679
Part#: 11518638026
Ships on Feb 11, 2027
New Item
$ 119.99 USD
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$ 119.99 USD
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Rein Turbo Coolant Hose - F22/23, F30/34, F32/33, F36, G01, G02, G11, G30, G32 - B58
Rein Turbo Coolant Hose - F22/23, F30/34, F32/33, F36, G01, G02, G11,...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:53856297
Part#: 11538611277
Ships in 4 Business Days
New Item
$ 44.99 USD
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$ 44.99 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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Mechanical Water Pump
Mechanical Water Pump
Febi - Corporate Logo
T#:56471651
Part#: 11518632585
Special Order: No Guaranteed ETA
New Item
$ 67.99 USD
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$ 67.99 USD
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This water pump is manufactured to match original equipment standards, offering a drop-in replacement.

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