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BMW Cooling System Parts & Accessories for BMW 7 Series E38 (1995-2001)

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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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OEM Febi Auxiliary Fan Switch

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T#:340712

Part#: 13621433077

Ships on Jan 11, 2027

$ 29.99 USD

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$ 29.99 USD

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The auxiliary fan switch activates the auxiliary cooling fan to provide additional cooling under high heat loads, and when the car is stationary.

Engine Fan - E31 E32 E34 E38 E39 with V8

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T#:4528

Part#: 11521712110

Ships in 1 Business Day

$ 83.64

This product was last offered at the strikethrough price on
05-29-2026

$ 74.27 USD

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$ 74.27 USD

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11 blade engine fan for cars with M60 M62 and S62 V8 engines. Since the late 1800’s Febi has been fabricating replacement metal parts. This history is self-evident in the quality and vast amount of applications they serve. With more than 34,000 repair solutions for cars and commercial vehicles, you can be sure Febi has you covered.

This item fits the following BMWs:
1993-1995 E34 BMW 530i 540i
1997-2003 E39 BMW 540i M5
1992-1994 E32 BMW 740i 740il 750il
1995-2001 E38 BMW 740i 740il 750il
1990-1999 E31 BMW 840i 840ci 850i 850ci 850csi

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BMW Coolant / Antifreeze - 1.5L

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T#:16175674

Part#: 82141467704

Ships on Jan 11, 2027

$ 70.99 USD

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$ 70.99 USD

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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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Coolant Expansion Tank

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T#:591959

Part#: 17111741167

Ships in 1 Business Day

$ 69.99 USD

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$ 69.99 USD

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Plastic has a limited lifespan - replace every 80,000 miles

BMW Engine Water Hose 11531711877

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T#:6947

Part#: 11531711877

In Stock

$ 71.99 USD

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$ 71.99 USD

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GENUINE BMW ENGINE WATER HOSE 11531711877.--

This item fits the following BMWs:
BMW 7 Series - 750iL

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OEM Coolant Return Pipe from Water Pump Hose to Transmission Cooler T...

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T#:6945

Part#: 11531711384

In Stock at Vendor

$ 68.99 USD

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This is the cooling system return hose that goes from the automatic transmission cooling thermostat to the hose that comes off the lower water pump outlet.1999-2003 E39 BMW 540i
1999-2001 E38 BMW 740i 740il

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BMW Radiator Hose Kit - 11537505229

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T#:46719191

Part#: CHK0008P

Ships in 3 Business Days

$ 61.99 USD

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$ 61.99 USD

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Keep your cooling system sealed, strong, and ready for anything with this Rein radiator hose kit—your all-in-one fix for cracked, leaking, or worn factory hoses. Years of heat, pressure, and age can cause rubber to weaken, split, or swell, setting the stage for coolant leaks and potential overheating. Rein hoses are engineered to meet or exceed OEM standards, built from premium, heat-resistant materials that can take on extreme temperatures and system pressures without faltering. Each hose features factory-correct bends, fittings, and diameters for an exact, hassle-free installation—no cutting or forcing required. Whether you’re tackling a full cooling system refresh or chasing down a small coolant leak, this Rein kit provides everything needed to restore confidence and performance under the hood. Why choose this Rein radiator hose kit: Factory-level precision – Direct-fit replacements that deliver OEM-quality reliability. Built to last – Resists cracking, swelling, and chemical damage from daily heat cycling. Confidence restored – Prevents coolant loss, overheating, and on-road breakdowns. All-in-one upgrade – Includes upper and lower hoses for a complete system refresh. If keeping your BMW’s cooling system running tight and trouble-free is the goal, Rein brings the dependable quality and fitment you can count on—engineered to perform just like factory, mile after mile.

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Meyle Water Pump - M62

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T#:579328

Part#: 11510393336

Ships on Oct 22, 2026

$ 106.99 USD

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$ 106.99 USD

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Don't take your car's cooling system for granted. A waterpump failure can cost you an engine, which is why preventatively replacing your BMWs waterpump and refreshing the cooling system every 60,000 miles. The water pump is a weak point is the cooling system. Replacing your waterpump will go a long way for keeping your car on the road and operating properly.

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Meyle Radiator Fan Clutch - E31, E32, E34, E38, E39

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T#:591319

Part#: 11527502804

In Stock

$ 101.99 USD

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$ 101.99 USD

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OEM replacement

Meyle Expansion Tank Cap

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T#:579357

Part#: 3148009004

In Stock

Sale - Save 40% $ 14.99

This product was last offered at the strikethrough price on
05-15-2026

$ 8.99 USD

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Sale - Save 40%

$ 14.99

This product was last offered at the strikethrough price on
05-15-2026

$ 8.99 USD

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Replace worn or missing pieces.

Rein Water Pump O-Ring (Small) - E32, E34, E38, E39

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T#:379680

Part#: 11531710055

In Stock

$ 2.03 USD

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$ 2.03 USD

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When it comes time to replace the water pump, be sure to replace all the O-Rings associated with it to ensure that your car stays leak free. If you are experiencing leaking issues, be sure to inspect these rings, as they might have worn down. This specific ring is used when replacing water pump on cooling pipe to the water accumulator. There are two per car.

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OE Rein Lower Radiator Hose - E39 540i, E38 740i/IL 1996-1998 ...

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T#:374352

Part#: 11531741409

In Stock

$ 17.99

This product was last offered at the strikethrough price on
09-24-2026

$ 16.99 USD

Limited Qty Sale

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$ 17.99

This product was last offered at the strikethrough price on
09-24-2026

$ 16.99 USD

Limited Qty Sale

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This item fits the following BMWs:
1997-1998   E39 BMW   540i
1996-1998   E38 BMW   740i 740il

Febi Coolant Level Sensor - E31, E38, E39

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T#:341632

Part#: 61318360876

Ships in 3 Business Days

$ 14.99

This product was last offered at the strikethrough price on
10-05-2026

$ 10.99 USD

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$ 10.99 USD

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Monitors the coolant level in the expansion tank

Rein Coolant Bleeder Screw CHW1575 - Priced Each

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T#:591955

Part#: 17111712788

In Stock

$ 4.99 USD

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$ 4.99 USD

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Coolant Bleeder Screw is a critical component for maintaining your BMW’s cooling system. Designed to release trapped air from the coolant lines, this screw ensures efficient coolant flow and prevents overheating. Specifically engineered for BMW models, it enhances the overall performance and longevity of your engine by maintaining proper temperature regulation. Comes with O-Ring.

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OEM Rein Expansion Tank Cap - BMW E32 E34 E36 E38 E39 E46 & More ...

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T#:340541

Part#: 17111742231

Ships on Oct 22, 2026

$ 17.99

This product was last offered at the strikethrough price on
09-29-2026

$ 14.99 USD

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$ 14.99 USD

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This radiator expansion tank cap is used most BMW's from 1991-2006. It is a common failure item. When this item fails, it cannot hold pressure which results in your BMW overheating. If you are overhauling your coolant system, now is the time to consider preventative replacing this cap. It is also referred to as the coolant reservoir cap.

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Rein Expansion Tank Hose - E31, E38, E39

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T#:375756

Part#: 11531741404

In Stock

$ 8.45 USD

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Connects the expansion tank to the radiator

Rein Thermostat Assembly E38 740iL

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T#:34114233

Part#: 11531437526

Ships in 3 Business Days

$ 68.99 USD

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$ 68.99 USD

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Regulates Engine coolant temperature. Comes with aluminum housing, O-ring, and sensor.

OEM Rein Coolant Line - E38

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T#:379758

Part#: 64218377662

Ships in 3 Business Days

$ 15.99 USD

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$ 15.99 USD

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Runs from the right heater core to the water valve. Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.

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Coolant hose

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T#:592665

Part#: 64218391121

Ships in 3 Business Days

$ 14.99 USD

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$ 14.99 USD

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OEM Rein Coolant Supply Hose - E38 740i/il

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T#:379736

Part#: 64218371386

Ships in 1 Business Day

$ 10.99 USD

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$ 10.99 USD

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Runs from the water valve to the Right heater core inlet. Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.

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Coolant hose

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T#:593459

Part#: 64218390355

Ships in 3 Business Days

$ 13.99 USD

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$ 13.99 USD

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OEM Rein Heating Core Return Hose - E38 740i/il

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T#:375753

Part#: 64218390319

Ships in 1 Business Day

$ 7.63 USD

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$ 7.63 USD

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Attaches to the water pipe on the back of the engine block to the secondary water pump. Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.

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Rein Radiator Hose - Upper - E38

2X Entries Into Our F80 M3 Sweepstakes

T#:591793

Part#: 11531741408

Ships in 1 Business Day

$ 13.99 USD

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$ 13.99 USD

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Hose from radiator to water pump

Rein Coolant Return line - E38

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T#:591958

Part#: 17111737708

Ships in 3 Business Days

$ 9.17

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

$ 9.06 USD

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$ 9.06 USD

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From expansion tank to radiator

Rein O-RING 14.4X3.0 - E38, E39

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T#:379805

Part#: 11537501777

Ships in 3 Business Days

$ 6.99 USD

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$ 6.99 USD

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OEM Rein Coolant Hose - E38 E39 M62 4.4L

For vehicles with production date from 09/1998

2X Entries Into Our F80 M3 Sweepstakes

T#:375752

Part#: 11537511207

Ships in 3 Business Days

$ 25.83

This product was last offered at the strikethrough price on
08-13-2026

$ 19.36 USD

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$ 19.36 USD

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Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.

OE Rein Upper Radiator Hose - E39 540i, E38 740i/IL 1996-1998 ...

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T#:6976

Part#: 11531745595

Ships in 3 Business Days

$ 16.99 USD

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$ 16.99 USD

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ENGINE WATER HOSE 11531745595.--

This item fits the following BMWs:
BMW 5 Series - 540i, 540i Wagon
BMW 7 Series - 740i, 740iL

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Water Temperature Sensor

T#:596874

Part#: 12621288158

Ships in 1 day

$ 44.99 USD

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$ 44.99 USD

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M14x1.5 Thread. Your vehicle is equipped with numerous gauges to allow you to have a better idea of what is going on under the hood. By monitoring these gauges, you can prevent premature engine damage due to low oil pressure or high coolant temperatures. If one isn't functional though, you are in the dark as far as that system goes. One of the most vital is coolant temperature. Replace the sensor to get your gauge working properly again.

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Hella Coolant Temperature Sender - E31, E32, E34, E36, E38

Located in the water accumulator Located in the cylinder head

T#:580139

Part#: 9107471

Ships in 3 Business Days

$ 15.99 USD

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$ 15.99 USD

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2 pin

Rein Coolant Overflow Hose

2X Entries Into Our F80 M3 Sweepstakes

T#:19458

Part#: 17111427156

Ships on Oct 22, 2026

$ 5.99 USD

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$ 5.99 USD

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Rein Coolant Overflow Hose is designed to meet the highest standards of performance and durability for your vehicle's cooling system. This high-quality hose ensures the proper transfer of excess coolant from the engine to the overflow reservoir, preventing overheating and ensuring optimal engine performance. Manufactured from reinforced rubber materials, the Rein Coolant Overflow Hose guarantees long-lasting reliability and precise fitment for various vehicle makes and models. It’s the perfect upgrade or replacement for worn-out hoses in any cooling system.

Available through Turner Motorsport, this coolant overflow hose is rigorously tested to withstand extreme temperatures, pressures, and daily use. If you’re looking to maintain or improve your car's cooling efficiency, the Rein Coolant Overflow Hose is an essential component.

Precision engineered for a perfect fit
Manufactured from durable, reinforced rubber
Designed to withstand high temperatures and pressures
Improves cooling system efficiency and prevents overheating
Easy installation with OE-spec dimensions
Available at Turner Motorsport, trusted for automotive parts

Enhance your vehicle's performance and reliability by replacing your old coolant hose with the Rein Coolant Overflow Hose today.

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Febi Radiator Fan Clutch - E31, E32, E34, E38, E39

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T#:341629

Part#: 11527502804

Special Order: No Guaranteed ETA

$ 109.99 USD

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$ 109.99 USD

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Quality aftermarket replacement

Febi Coolant Expansion Tank - E31, E38, E39

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T#:381841

Part#: 17111741167

Special Order: No Guaranteed ETA

$ 90.99 USD

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$ 90.99 USD

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Replace your cracked or faded expansion tank.

Febi Coolant Hose - E38, E39

For vehicles with production date up to 09/1998

We Price Match - Give Us A Call or Chat!

T#:381793

Part#: 11531745595

Special Order: No Guaranteed ETA

$ 22.99 USD

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$ 22.99 USD

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Replacement upper radiator hose. This is an OEM BMW replacement hose.

This item fits the following BMWs:
1997-1998 E39 BMW 540i
1996-1998 E38 BMW 740i 740il

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Febi Radiator Hose - Lower - E38, E39

For vehicles with production date up to 09/1998

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T#:382399

Part#: 11531741409

Special Order: No Guaranteed ETA

$ 22.99 USD

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$ 22.99 USD

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Replacement lower radiator hose. This is an OEM BMW replacement hose.

This item fits the following BMWs:
1997-1998   E39 BMW   540i
1996-1998   E38 BMW   740i 740il

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Febi Expansion Tank Hose - E31, E38, E39

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T#:6969

Part#: 11531741404

Special Order: No Guaranteed ETA

$ 22.99 USD

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$ 22.99 USD

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ENGINE WATER HOSE 11531741404

Coolant Temperature Sensor

Located on water pump housing

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T#:594615

Part#: 13621703993

Ships on Oct 22, 2026

$ 18.99 USD

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$ 18.99 USD

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This is the coolant temperature sensor used in many BMW models from the mid-1990s to the mid-2000s. The engine computer relies on the coolant temp to set the fuel mapping for the engine. As the car warms up the computer changes the fuel mixture. If your car is running a bit rich (too much fuel) it could be because this sensor is failing and not sending the correct info to the computer.

This sensor is located in a variety of places depending on the engine. But it's one of those easy replacement items 'while you're in there' when doing a water pump or thermostat replacement.

This coolant temp sensor fits the following BMWs:
1996-1999 E36 BMW 323is 323ic 328i 328is 328ic M3, located in cylinder head
1999-2003 E39 BMW 540i, located on side of water pump
1999-2001 E38 BMW 740i 740il, located on side of water pump
1995-1996 E38 BMW 750il, located on side of water pump
1990-1999 E31 BMW 850i 850ci, located on side of water pump
2000-2006 E53 BMW X5 3.0i, located in cylinder head
2000-2006 E53 BMW X5 4.4i/4.6is/4.8is, located on side of water pump
1997-2002 Z3 BMW Z3 2.5i Z3 3.0i, located in cylinder head

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Coolant Level Sensor

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T#:594511

Part#: 61318360876

Ships on Oct 22, 2026

$ 27.99 USD

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$ 27.99 USD

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Monitors the coolant level in the expansion tank. This sensor is critical in keeping tabs of your cooling systems health.

Auxillary Fan Switch

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T#:4934936

Part#: 3148210000

Ships on Oct 22, 2026

$ 18.99 USD

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$ 18.99 USD

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The auxiliary fan switch activates the auxiliary cooling fan to provide additional cooling under high heat loads, and when the car is stationary. Also known as the coolant temperature sending unit, comes with related o-ring

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BMW Coolant Expansion Tank With Cap

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T#:46616009

Part#: EPK0013

In Stock at Vendor

$ 71.99 USD

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$ 71.99 USD

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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break. You want to keep all the coolant in your vehicle in the cooling system. If your tank has experienced damage such as cracking, nipples breaking off, or mounting point damage, you will need to replace it. This replacement will fit perfectly and provide the same heating and cooling characteristics as an original unit. When replacing, be sure to have some extra coolant. Check ECS Tuning's website for a wide variety of coolants specifically designed for your car. Most German vehicles require specialized coolant. Be sure to pick up the proper coolant when refilling to avoid damage or premature corrosion.

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Febi Coolant Temperature Sender - E31, E32, E34, E36, E38

Located in the water accumulator Located in the cylinder head

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T#:382428

Part#: 12621747281

In Stock

$ 20.99 USD

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$ 20.99 USD

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2 pin

Expansion Tank Hose

2X Entries Into Our F80 M3 Sweepstakes

T#:379785

Part#: 17111737819

Back Ordered

$ 26.99 USD

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$ 26.99 USD

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Connects the expansion tank to the radiator

OEM Radiator Water Valve Hose - Left - E38 740

2X Entries Into Our F80 M3 Sweepstakes

T#:11094

Part#: 64218391122

Back Ordered

$ 6.54 USD

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$ 6.54 USD

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This is the hose that runs from the left radiator to the water valve. Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.

This item fits the following BMWs:
1999-2001 E38 BMW 740i 740il

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