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Vaico BMW Cooling System Parts & Accessories

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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Vaico Coolant Overflow Hose - Radiator to Expansion Tank - BMW F01 F0...

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T#:595421

Part#: 17127575428

In Stock at Vendor

$ 82.99

This product was last offered at the strikethrough price on
05-07-2026

$ 80.99 USD

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$ 80.99 USD

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Overflow hoses connect the radiator and the expansion tank to store overflow of coolant. As pressures in the cooling system increase due to coolant temperatures, a valve on the radiator cap permits coolant back into the reservoir to help ease the build-up of pressure and prevent coolant loss. If your hose is leaking or damaged, we recommend swapping it out with this replacement from Vaico.

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Vaico Coolant Hose - Radiator Outlet Hose to Trans Cooler - BMW E38 E...

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T#:595257

Part#: 11531711384

In Stock at Vendor

$ 129.99

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

$ 125.99 USD

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$ 125.99 USD

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This hose connects the radiator outlet hose to the transmission heat exchanger

Vaico Coolant Hose - Trans Cooler to Radiator - BMW E70 X5 N52 N62 ...

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T#:595408

Part#: 17127537101

In Stock at Vendor

$ 57.99

This product was last offered at the strikethrough price on
04-06-2026

$ 55.99 USD

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$ 55.99 USD

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Returns coolant from the transmission heat exchanger to the radiator

Vaico Radiator Return Coolant Hose - BMW E70 X5 35d M57

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T#:21965996

Part#: 17127794153

In Stock at Vendor

$ 245.99

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

$ 238.99 USD

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$ 238.99 USD

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Returns coolant from the engine to the radiator

Vaico Intercooler Coolant Hose - Auxiliary Water Pump to Expansion Ta...

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T#:595431

Part#: 17127591512

In Stock at Vendor

$ 185.99

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

$ 179.99 USD

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$ 179.99 USD

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Replacement coolant hose that connects the expansion tank to the auxiliary water pump. Replace your old hose to prevent coolant loss and overheating.

Vaico Lower Radiator Hose - BMW Z4 2.5 3.0 M54

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T#:363540

Part#: 17127514405

In Stock at Vendor

$ 96.99

This product was last offered at the strikethrough price on
05-07-2026

$ 93.99 USD

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$ 93.99 USD

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Replace your leaking coolant hose and prevent engine overheating with this replacement Vaico coolant hose.

Vaico Expansion Tank Coolant Hose - BMW E70 X5 35d M57

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T#:41052807

Part#: 17127808117

Special Order: No Guaranteed ETA

$ 230.99

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

$ 75.99 USD

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$ 75.99 USD

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Connects the lower expansion tank connection to the transmission heat exchanger

Vaico Upper Radiator Coolant Hose - BMW G30 G32 G11/G12 B58A ...

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T#:41188159

Part#: 17128602871

Special Order: No Guaranteed ETA

$ 85.99 USD

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$ 85.99 USD

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Directs coolant from the engine to the radiator. Stop leaks and prevent overheating with a new upper radiator hose.

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