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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BMW Antifreeze Coolant - 1 Gallon
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Genuine BMW - Corporate Logo
T#:1474
Part#: 82141467704
In Stock
6% off MSRP $ 28.25

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

$ 26.48 USD
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6% off MSRP
$ 28.25

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

$ 26.48 USD
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The use of Original BMW Anti-Freeze/Coolant will ensure sufficient cooling in summer and protection against freeze-ups in winter. BMW Antifreeze/Coolant will also guard your vehicle's various engine components against corrosion.
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PENTOFROST NF 50/50 Antifreeze / Coolant Prediluted / Premixed - 1 G...
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Pentosin - Corporate Logo
T#:34181293
Part#: 8114308
In Stock
$ 20.99 USD
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Febi Auxiliary Fan Switch - 82�C - E12, E21, E23, E24, E28, E3, ...
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Febi - Corporate Logo
T#:10520
Part#: 61311364272
In Stock
$ 20.99 USD
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CHASSIS ELECTRICAL TEMPERATURE SWITCH 61311364272

Trunk Tool Kit Water Pump Pliers - E36 E46 E30 E39
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Genuine BMW - Corporate Logo
T#:11239
Part#: 71111179522
Ships in 1-2 days
4% off MSRP $ 47.99

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

$ 45.99 USD
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4% off MSRP
$ 47.99

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

$ 45.99 USD
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Missing a tool from your trunk mounted tool kit? Replace your missing water pump pliers with this Genuine BMW part. Having a complete tool kit is handy for quick repairs or it can save you in case of roadside failures. Also a complete tool kitis must when selling a car. If the tool kit is missing parts, what else has been neglected on the car?

This item fits the following BMWs:
1970-1976 2002 BMW 1600 2002 2002tii
1977-1983 E21 BMW 320i
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix M3
1992-1998 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3
1976-1978 E12 BMW 530i
1982-1988 E28 BMW 528e
1989-1995 E34 BMW 525i 530i 535i 540i M5
1997-2003 E39 BMW 525i 528i 530i 540i M5
1988-1994 E32 BMW 735i 735il 740i 740il 750il
1995-2001 E38 BMW 740i 740il 750il
1990-1999 E31 BMW 840i 840ci 850i 850ci 850csi
1996-2000 Z3 BMW M Roadster M Coupe
2000-2003 E52 BMW Z8 Roadster
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Genuine BMW Temperature Sensor - E21 320i E28 524td
For vehicles with a production date from 09/1979
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Genuine BMW - Corporate Logo
T#:40756
Part#: 12631279721
In Stock
8% off MSRP $ 47.99

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

$ 43.99 USD
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8% off MSRP
$ 47.99

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

$ 43.99 USD
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Genuine BMW Temperature Switch - 17Cel

Fits BMW Engines including:
M10

Genuine BMW Auxiliary Fan Switch – 91°C
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Genuine BMW - Corporate Logo
T#:368494
Part#: 61311364272
Ships in 3 Business Days
5% 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.

$ 71.99 USD
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5% 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.

$ 71.99 USD
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Genuine BMW Return coolant pipe - E21 320i
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Genuine BMW - Corporate Logo
T#:35756
Part#: 11531264718
Special Order: No Guaranteed ETA
3% 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.

$ 227.99 USD
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3% 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.

$ 227.99 USD
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Genuine BMW Return Pipe -

This item fits the following BMW Chassis:
E30

Fits BMW Engines including:
M10

BMW Coolant / Antifreeze - 1.5L
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Febi - Corporate Logo
T#:16175674
Part#: 82141467704
Ships on Aug 31, 2026
$ 70.99 USD
Free Shipping on orders $49 and up
Coolant G11 (Concentrate). The right anti-freeze agent makes a key contribution towards the reliable functioning of the engine cooling system under all operating and weather conditions. Cooler anti-freeze agents from Febi are precisely matched to the special requirements of the vehicle manufacturer and offer reliable protection from damages caused by freezing, corrosion, and cavitation. A good functioning cooling system is a primary prerequisite for the optimum operation of the engine. The ideal mixing ratio is 1:1, which offers frost protection to -36° C. With a ratio of 1:1 of water and concentrate, the boiling point of the cooling is approximately 107° C.+ High protection against freezing, corrosion, and cavitation Prevention of deposits and foam formation
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Genuine BMW Coolant hose - E34 535i
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Genuine BMW - Corporate Logo
T#:367918
Part#: 17121712736
In Stock
5% off MSRP $ 79.99

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

$ 75.99 USD
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5% off MSRP
$ 79.99

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

$ 75.99 USD
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Genuine BMW Coolant Flange - E30 318i M10 1.8L E21 320i
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Genuine BMW - Corporate Logo
T#:6878
Part#: 11531261528
Ships in 1-2 days
5% 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.

$ 212.99 USD
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5% 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.

$ 212.99 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 ...
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Genuine BMW - Corporate Logo
T#:368855
Part#: 11531253249
Ships in 1-2 days
5% 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.

$ 318.99 USD
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5% 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.

$ 318.99 USD
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Genuine BMW Coolant Temperature Sensor
For vehicles with production date up to 09/1979
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Genuine BMW - Corporate Logo
T#:191592
Part#: 62111268355
Ships in 1-2 days
4% off MSRP $ 50.99

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

$ 48.99 USD
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4% off MSRP
$ 50.99

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

$ 48.99 USD
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Genuine BMW Engine Coolant Temp Sensor -
This item fits the following BMW Chassis:
E30



Coolant Hose
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Genuine BMW - Corporate Logo
T#:360987
Part#: 64211367327
Ships in 5 Business Days
4% off MSRP $ 24.99

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

$ 23.99 USD
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4% off MSRP
$ 24.99

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

$ 23.99 USD
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FAE Auxiliary Fan Switch 91C - E12, E21, E23, E24, E28, E3, E30, E9 ...
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FAE - Corporate Logo
T#:369371
Part#: 61311364272
Ships in 4 Business Days
$ 26.37 USD
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Does not include o-ring
Genuine BMW Heater Core Supply Hose - E21 320i
For vehicles with a production date up to 09/1979
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Genuine BMW - Corporate Logo
T#:11068
Part#: 64211364764
Ships in 8 Business Days
5% off MSRP $ 61.99

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

$ 58.99 USD
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5% off MSRP
$ 61.99

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

$ 58.99 USD
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GENUINE BMW HEATER & A/C HOSE, INLET 64211364764.--

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

--.

Fan Shroud - E21
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Genuine BMW - Corporate Logo
T#:22495
Part#: 17111116512
Special Order: No Guaranteed ETA
5% 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.

$ 103.99 USD
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5% 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.

$ 103.99 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 Coolant hose - E21 320i
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Genuine BMW - Corporate Logo
T#:6897
Part#: 11531266741
Special Order: No Guaranteed ETA
$ 36.99

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

$ 34.99 USD
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$ 34.99 USD
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Genuine BMW ENGINE WATER HOSE 11531266741.--

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

--.

Fits BMW Engines including:
M10

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Febi Thermostat - 71°C - E10, E21, E30
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Febi - Corporate Logo
T#:381782
Part#: 11531253249
Ships on Aug 31, 2026
$ 49.99 USD
Free Shipping on orders $49 and up
Includes a complete housing

BMW Antifreeze Coolant - 1 Liter Bottle
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Genuine BMW - Corporate Logo
T#:11526
Part#: 82142209769
In Stock
$ 10.60

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

$ 10.49 USD
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$ 10.49 USD
Free Shipping on orders $49 and up
This 1 liter bottle is perfect for topping of the coolant in your BMW. This is The use of Original BMW Anti-Freeze/Coolant will ensure sufficient cooling in summer and protection against freeze-ups in winter. BMW Antifreeze/Coolant will also guard your vehicle's various engine components against corrosion. BMW Anti-Freeze/ Coolant will prevent excessive silicate gel precipitation, which may cause plugging of the cooling system and lead to more extensive repairs.
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Rein Expansion Tank Hose - E12, E21, E23, E24, E28, E30, E32, E34 ...
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Rein - Corporate Logo
T#:19431
Part#: 17121712736
In Stock
$ 13.99 USD
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VENT HOSE 17121712736 Manufactured by CRP


Water Hose
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URO - Corporate Logo
T#:373139
Part#: 11531266472
In Stock
$ 1.99 USD
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Return pipe to water pump

Genuine BMW Isa Screw - 07129905494
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Genuine BMW - Corporate Logo
T#:28891
Part#: 07129905494
In Stock
5% off MSRP $ 7.74

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

$ 7.33 USD
Free Shipping on orders $49 and up
5% off MSRP
$ 7.74

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

$ 7.33 USD
Free Shipping on orders $49 and up
Genuine water pump hardware. M6x16-8.8. 6 of these screws are found in association with the water pump
Genuine BMW Hose Clamp 07129952104
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Genuine BMW - Corporate Logo
T#:6533
Part#: 07129952104
In Stock
$ 3.99 USD
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GENUINE BMW HOSE CLAMP 07129952104
Coolant Temperature Sensor
For vehicles with production date up to 09/1979
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URO - Corporate Logo
T#:372927
Part#: 62110788115
Ships in 1 Business Day
$ 5.99 USD
Free Shipping on orders $49 and up
$ 5.99 USD
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This coolant sensor is located in the coolant system, monitor the temperature for both the gauge and ECU.


OEM Rein Radiator Cap - E21 E24 E10 E12 E23 E28
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Rein - Corporate Logo
T#:7395
Part#: 17111100848
In Stock at Vendor
$ 11.99 USD
Free Shipping on orders $49 and up
The radiator tank cap keeps necessary pressure on your coolant to increase efficiency. If you have an overheating issue in your vehicle, a simple, quick, and inexpensive part to replace is this cap. Often times, the coolant is not kept under enough pressure to keep it from boiling or expanding too much. This cap keeps all the heat and liquid inside the coolant system for maximum efficiency. Should be replaced each time major coolant system service is performed.
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Expansion Tank Hose
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URO - Corporate Logo
T#:50066848
Part#: 17121712736
In Stock
New Item
$ 12.79 USD
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Coolant overflow hose designed to route excess coolant to and from the expansion tank, helping regulate system pressure and maintain proper coolant levels. Manufactured for correct fit and flow, it ensures reliable expansion tank operation and leak-free performance.
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OEM Rein Radiator Coolant Cap
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Rein - Corporate Logo
T#:38161716
Part#: 92810625703
Ships in 4 Business Days
$ 11.99 USD
Free Shipping on orders $49 and up
Rein Automotive OE Quality caps are designed to be direct replacements for OE caps. Rein caps are designed to match or exceed the OE materials used and are produced to the highest standards to ensure long service life. Rein Automotive OE quality caps keep the coolant system at the proper pressure, just like the OE cap.
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Lower Radiator Hose
For vehicles with a production date from 09/1979
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URO - Corporate Logo
T#:591747
Part#: 11531266956
Ships in 1 Business Day
$ 6.99 USD
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$ 6.99 USD
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Attaches from the radiator to the bottom of the thermostat housing

Coolant Hose
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URO - Corporate Logo
T#:591745
Part#: 11531266471
Ships in 1 Business Day
$ 10.99 USD
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From the water pump to the thermostat
O-RING
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Victor Reinz - Corporate Logo
T#:580584
Part#: C32348
In Stock
$ 3.99

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

$ 2.99 USD
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$ 2.99 USD
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FAE Coolant Temperature Sensor
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FAE - Corporate Logo
T#:10784
Part#: 62110788115
Ships in 1-2 days
$ 13.99 USD
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INSTRUMENTS ENGINE COOLANT TEMP SENSOR 62110788115
Genuine BMW Water Hose - Thermostat to Water Pump Bypass - E10 ...
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Genuine BMW - Corporate Logo
T#:6893
Part#: 11531266471
Ships in 5 Business Days
$ 11.99 USD
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Genuine BMW ENGINE WATER HOSE 11531266471.--

This item fits the following BMWs:
BMW 1600, 2002, 2002tii
BMW 3 Series - 320i

--.

Fits BMW Engines including:
M10

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FAE Temperature Sending Unit - Temperature Gauge (One Prong Spade Typ...
For vehicles with production date up to 09/1979
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FAE - Corporate Logo
T#:596552
Part#: 62111268355
Ships in 4 Business Days
$ 13.99 USD
Free Shipping on orders $49 and up
$ 13.99 USD
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Water Hose - E21
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Genuine BMW - Corporate Logo
T#:22307
Part#: 11531266463
Ships in 6 Business Days
$ 14.99 USD
Free Shipping on orders $49 and up


Genuine BMW WATER HOSE.--

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

--.

Fits BMW Engines including:
M10

Expansion Tank - E21
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Genuine BMW - Corporate Logo
T#:44522
Part#: 16121118911
Ships in 6 Business Days
4% 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.

$ 89.99 USD
Free Shipping
4% 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.

$ 89.99 USD
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Genuine BMW EXPANSION TANK

Fits BMW Engines including:
M10

Water Hose - E21
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Genuine BMW - Corporate Logo
T#:407578
Part#: 11531266468
Ships in 6 Business Days
$ 14.99 USD
Free Shipping on orders $49 and up