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Genuine BMW BMW Cooling System Parts & Accessories for BMW E46 M3 S54 (1999-2005)

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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T#:1474

Part#: 82141467704

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6% off MSRP $ 28.29

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$ 26.63 USD

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$ 28.29

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$ 26.63 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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Genuine BMW Temperature Sensor

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T#:367843

Part#: 13621433076

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16% off MSRP $ 66.05

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$ 55.45 USD

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16% off MSRP

$ 66.05

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$ 55.45 USD

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Genuine BMW Expansion Tank Cap - E3X / E53 / Z4

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T#:207187

Part#: 17117639022

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21% off MSRP $ 34.96

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$ 27.67 USD

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21% off MSRP

$ 34.96

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

$ 27.67 USD

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Genuine BMW Radiator Cap - 2,0Bar
This item fits the following BMW Chassis:
E36 M3,E39 M5,E46 M3,E85 Z4M,E53 48IS,E36,E38,E39,E46,E53 X5,E65,E83 X3,E85 Z4,E86 Z4,F06,F10,F12,F13

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Genuine BMW Auxiliary Fan Switch

Mounted in upper radiator hose, controls operation of auxiliary fan

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T#:341058

Part#: 13621433077

In Stock

16% off MSRP $ 66.05

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

$ 55.55 USD

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16% off MSRP

$ 66.05

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$ 55.55 USD

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Water Pump Gasket - S54

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T#:12466

Part#: 11517831099

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14% off MSRP $ 41.99

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$ 36.13 USD

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14% off MSRP

$ 41.99

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$ 36.13 USD

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Steel water pump gasket for your Z3 / M3

Genuine BMW Coolant Expansion Tank - E46 M3

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T#:13185

Part#: 17112283344

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7% off MSRP $ 215.23

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$ 199.98 USD

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7% off MSRP

$ 215.23

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$ 199.98 USD

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This radiator coolant reservoir/expansion tank for E46 M3 is a common failure item as the plastic weakens over time and stress crack will lead to coolant leaks. If your car has over 80k miles and hasn't had one of these replaced, we highly recommend it during your next major service. We have found that the aftermarket coolant reservoirs fail easier than the original BMW piece so we only offer the BMW type on this part.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This item fits the following BMWs:
2001-2006 E46 BMW M3

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Expansion Tank Water Pipe / Connecting Hose - E46 M3

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T#:12482

Part#: 17112229053

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1% off MSRP $ 96.35

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

$ 95.28 USD

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1% off MSRP

$ 96.35

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$ 95.28 USD

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This is the Genuine BMW coolant reservoir / expansion tank vent hose for E46 M3 with the S54 engine.

This item fits the following BMWs:
2001-2006 E46 BMW M3

Genuine BMW Heater Hose - E46 M3

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T#:14119

Part#: 64216902680

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1% off MSRP $ 73.99

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

$ 72.99 USD

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1% off MSRP

$ 73.99

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

$ 72.99 USD

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Genuine BMW Hose F Radiator And Engine Return
This item fits the following BMW Chassis:
E46 M3,E46

Genuine BMW Thermostat - 80*C - E46 M3, MZ3 S54, Z4 M

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T#:12502

Part#: 11531318274

In Stock

16% off MSRP $ 147.44

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

$ 123.15 USD

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16% off MSRP

$ 147.44

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$ 123.15 USD

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GENUINE BMW THERMOSTAT - E46 M3, MZ3 (S54), MZ4. This is just the thermostat itself and does not include the housing o-ring or any others that are advised for replacement. See thermostat kit or our water pump kit for a complete package.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

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Trunk Tool Kit Water Pump Pliers - E36 E46 E30 E39

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T#:11239

Part#: 71111179522

Ships in 2 Business 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 Radiator Bracket - Lower - E46

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T#:21734

Part#: 17111436264

Ships in 2 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

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$ 23.99 USD

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Genuine BMW Bracket F.Radiator
This item fits the following BMW Chassis:
E46 M3,E46,E85 Z4

Fits BMW Engines including:
M52,M54,M56,S54

Thermostat With O-Rings - E46 M3, MZ3, Z4 M

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T#:2303

Part#: 11531318274-K

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$ 148.76 USD

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$ 148.76 USD

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Replacement stock thermostat for E46 M3, Z3M w S54 engine, Z4M.The thermostat can be replaced on the E46 M3 without removing the water pump. This can save you money if the pump still has life left on it but the thermostat needs to be done now. Symptoms of a bad thermostat include an erratic temp gauge and a fault code. When replacing the thermostat, there are three o-rings that will likely need to be replaced between the thermostat and the water pump housing, and two on the coolant tube going to the head. We also recommend new hoses, clamps, and BMW coolant. Replacement should take about one hour.

Note: even though this can be done without replacing the water pump, the job involves removing the same items to access this area. And opening the thermostat housing will spill a lot of coolant. In other words, if you don't replace the water pump at the same time, you're going to repeat this process when the pump needs replacing. We offer a complete water pump overhaul package that covers everything you need if you want to it all at once. You can the thermostat to that package and get everything without any duplicate parts. Click here for the E46 M3 water pump kit.

On S54 engines (E46 M3, MZ3, Z4 M) there is a flanged head bolt going into the cylinder head, behind the thermostat cover. This holds the left side timing chain guide rail in place and if it's loose or falls out you could have a very serious engine failure to deal with. Make sure to check this bolt while you have the thermostat cover off. You only need to make sure it's tight. But if it's come loose you may want to replace the seal ring and use a small touch of oil-resistant thread sealer.

This item fits the following BMWs:
2000-2001 E46 3 Series M3 M3 Convertible 2000-2006
2001-2002 Z3 Roadster / Coupe Z3 M Roadster Z3 M Coupe w S54 Engine
2006-2008 E86 E86 Z4 Z4 M Roadster Z4 M Coupe

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Genuine BMW BMW Cooling System Parts & Accessories for BMW E46 M3 S54 (1999-2005)

Sub-Categories

BMW Antifreeze Coolant - 1 Gallon

Genuine BMW Temperature Sensor

Genuine BMW Expansion Tank Cap - E3X / E53 / Z4

Genuine BMW Auxiliary Fan Switch

Water Pump Gasket - S54

Genuine BMW Coolant Expansion Tank - E46 M3

Expansion Tank Water Pipe / Connecting Hose - E46 M3

Genuine BMW Heater Hose - E46 M3

Genuine BMW Thermostat - 80*C - E46 M3, MZ3 S54, Z4 M

Trunk Tool Kit Water Pump Pliers - E36 E46 E30 E39

Genuine BMW Radiator Bracket - Lower - E46

Thermostat With O-Rings - E46 M3, MZ3, Z4 M

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