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BMW Cooling System Parts & Accessories for BMW E21 320i M10 1.8L

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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 Vacuum Purge & Refill Tool Set

10X Entries Into Our F80 M3 Sweepstakes

T#:402498

Part#: 024948SCH01A

In Stock

Sale - Save 25% $ 115.99

This product was last offered at the strikethrough price on
05-03-2026

$ 86.99 USD

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Sale - Save 25%

$ 115.99

This product was last offered at the strikethrough price on
05-03-2026

$ 86.99 USD

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The Schwaben Coolant Vacuum Fill Tool ensures no air pockets get into your cooling system while you're replacing your coolant - intended for use to refill your cooling system, not for removal. Can be used with Schwaben fluid extractors or with shop air - standard air compressor with a minimum rating of 90 PSI (6.2 bar). Includes all fittings and adapters necessary for use, with a molded storage case to keep your Schwaben Vacuum Fill Tool pristine for future use.

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Genuine BMW Auxiliary Fan Switch – 91°C

T#:368494

Part#: 61311364272

Ships in 3 Business Days

3% off MSRP $ 75.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 73.99 USD

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3% off MSRP

$ 75.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 73.99 USD

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Genuine BMW Coolant hose - E34 535i

T#:367918

Part#: 17121712736

In Stock

Sale - Save 8% $ 77.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 71.66 USD

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Sale - Save 8%

$ 77.99

This product was last offered at the strikethrough price on
08-26-2026

$ 71.66 USD

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Genuine BMW Coolant Flange - E30 318i M10 1.8L E21 320i

T#:6878

Part#: 11531261528

Ships in 2 Business Days

3% off MSRP $ 224.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 217.99 USD

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3% off MSRP

$ 224.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 217.99 USD

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Genuine BMW ENGINE DIVIDER 11531261528

Fits BMW Engines including:
M10

Genuine BMW Thermostat - 80ºC - E30 318i 1602 2002 2002tii E21 320i ...

T#:368855

Part#: 11531253249

Ships in 2 Business Days

3% off MSRP $ 336.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 326.99 USD

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3% off MSRP

$ 336.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 326.99 USD

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Fan Shroud - E21

T#:22495

Part#: 17111116512

Ships in 7 Business Days

3% off MSRP $ 108.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 105.99 USD

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3% off MSRP

$ 108.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 105.99 USD

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Genuine BMW FAN SHROUD.--

This item fits the following BMWs:
BMW 3 Series - 320i

--.

Fits BMW Engines including:
M10

Genuine BMW Return coolant pipe - E21 320i

T#:35756

Part#: 11531264718

Special Order: No Guaranteed ETA

2% off MSRP $ 233.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 228.99 USD

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2% off MSRP

$ 233.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 228.99 USD

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Genuine BMW Return Pipe -

This item fits the following BMW Chassis:
E30

Fits BMW Engines including:
M10

Expansion Tank - E21

T#:44522

Part#: 16121118911

Ships in 7 Business Days

3% off MSRP $ 93.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 90.99 USD

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3% off MSRP

$ 93.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 90.99 USD

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Genuine BMW EXPANSION TANK

Fits BMW Engines including:
M10

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