Transmission Cooler Hose Set - E39 540i 99-03, E38 740i/iL 99-01 ...

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T#:338705

Part#: TMS16592

Ships in 3 Business Days

Sale - Save 2% $ 171.99

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The oil cooler/heat exchanger for the automatic transmission is one of the most overlooked sections of the 540i and 740i cooling system. The cooler (heat exchanger) is a part of the overall cooling system and uses coolant circulated from the regular cooling system to cool the transmission oil running through this small cooling block. Some of the hoses are shared with the rest of the cooling system as well. The E38/E39 heat exchanger is located along the driver's side frame rail and is accessed from the wheel well. We recommend servicing or cleaning the heat exchanger along with any cooling system overhaul. Or if you're having transmission faults (especially for temperature) you may want to clean the transmission cooler anyway and these hoses will be a nice finishing touch.

Replacing or cleaning the heat exchanger components could lead to better shifting of the automatic as the cooler itself can become clogged. If you're experiencing harder or hesitating shifts, and the internal transmission temperature is rising without being regulated, the components in this system are the likely cause. Staying on top of the cooling needs of the transmission will help prevent a very costly transmission repair in the future. These hoses are easily replaced and you can clean the heat exchanger easily with brake cleaner and some brushes.

Included in this handy package are:

11531711381 - transmission cooling hose from water pump to radiator (with t-connector)

11531711385 - transmission cooling hose from radiator to cooler

11531711384 - transmission cooling hose from cooler to water pump

11537511207 - transmission cooling hose from cooler to chassis

hose clamp

o-ring

This hose set fits the following BMWs:
1999-2003 E39 BMW 540i
1999-2001 E38 BMW 740i 740il

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OEM Style Hose Clamps

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T#:338927

Part#: HOSE-CLAMPS

In Stock

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Starting at $ 3.87 USD

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Hose clamps for radiator hoses, coolant hoses, vacuum hoses, or intake hoses. These hose clamps are the same style as your OEM hoses with a smooth inside band to prevent cutting into the hose material.

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Race German Coolant Temperature Sender Adapter - M12x1.5

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T#:6827887

Part#: RGCTSAM12

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$ 35.99 USD

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Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for M12x1.5 sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor

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Race German Coolant Temperature Sender Adapter - 1/8NPT

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T#:6827888

Part#: RGCTSA1/8NPT

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$ 35.99 USD

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Race German has devoted themselves to providing quality products for late model BMWs that cover both street and track applications. Race German has now grown their catalog to a wide variety of models and products geared towards keeping your car looking and running nice. For those looking to install an aftermarket coolant temp gauge, Race German has the perfect accessory for you! This adapter is machined out of aluminum and splices into your upper radiator hose. Perfect for use with Race German's E30 temperature gauge but has compatibility with a wire variety of other cars as well! Features: Tapped for 1/8NPT sized sensor 38mm diameter outlets which fit most BMW hoses Includes 2x hose clamps **Does not include temp sensor

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Transmission Cooling Hose from Radiator to Oil Cooler - E39 540i, E38...

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T#:6946

Part#: 11531711385

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$ 31.99 USD

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This the the transmission cooling hose that goes from the radiator to the transmission oil regulator (# 17211437772 ) /oil cooler (# 17217505823 )/.

We offer all these hoses in our Transmission Cooling Hose Kit

This hose set fits the following BMWs:
1999-2003 E39 BMW 540i
1999-2001 E38 BMW 740i 740il

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Genuine BMW Transmission Cooling Hose from Oil Cooler to Metal Line -...

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T#:6986

Part#: 11537511207

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$ 28.99 USD

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This the the transmission cooling hose that goes from the transmission oil regulator (# 17211437772 ) /oil cooler (# 17217505823 ) to the metal line mounted to the chassis.

We offer all these hoses in our Transmission Cooling Hose Kit

This hose set fits the following BMWs:
1999-2003 E39 BMW 540i
1999-2001 E38 BMW 740i 740il

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Genuine BMW Upper Radiator Hose - E39 540i, E38 740i/iL

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T#:6983

Part#: 11537505228

Ships in 1-2 days

2% off MSRP $ 45.99

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$ 44.99 USD

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$ 45.99

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Replacement upper radiator hose - to water pump and alternator. This is an OE BMW replacement hose, with the plastic fittings and clamps installed.

This item fits the following BMWs:
1999-2003 E39 BMW 540i
1999-2001 E38 BMW 740i 740il

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

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T#:6945

Part#: 11531711384

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$ 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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Genuine BMW Lower Radiator Hose - E39 540i, E38 740i/iL

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T#:16593

Part#: 11537505229

Ships in 1-2 days

2% off MSRP $ 45.99

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$ 44.99 USD

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$ 45.99

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$ 44.99 USD

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Replacement lower radiator hose - to thermostat. This is an OE BMW replacement hose, with the plastic fittings and clamps installed.

This item fits the following BMWs:
1999-2003 E39 BMW 540i
1999-2001 E38 BMW 740i 740il

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Upper Radiator Hose - E38 E39 M62

For vehicles with production date from 09/1998

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T#:36100134

Part#: 11537505228

In Stock

$ 52.99

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

$ 38.99 USD

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This OEM-style upper radiator hose connects the upper radiator outlet to the thermostat housing.

If you're experiencing a leak or wear in your radiator hose, replace it with this high-quality, cost-effective replacement from Bremmen Parts to restore optimal cooling system performance.

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OEM Rein Coolant Hose - E38 E39 M62 4.4L

For vehicles with production date from 09/1998

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T#:375752

Part#: 11537511207

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$ 25.57 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.

Genuine BMW Coolant Hose - E38 740i 740iL

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T#:18865

Part#: 64218380270

Ships in 3 Business Days

3% off MSRP $ 28.99

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$ 27.99 USD

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$ 28.99

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Genuine BMW Hose F Engine Inlet And Addit.Water Pump -
This item fits the following BMW Chassis:
E38

Genuine BMW Transmission Cooling Hose - Water Pump to Radiator - E39 ...

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T#:6944

Part#: 11531711381

Ships in 3 Business Days

$ 34.99 USD

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This the the transmission cooling hose that goes from the radiator to the water pump. It also connects to the transmission cooling hose from cooler to water pump #11531711384.

We offer all these hoses in our Transmission Cooling Hose Kit

This hose set fits the following BMWs:
1999-2003 E39 BMW 540i
1999-2001 E38 BMW 740i 740il

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Genuine BMW Coolant Hose - Water Pump - E31 850Ci E38 750iL

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T#:6971

Part#: 11531741417

In Stock

$ 34.99 USD

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Genuine BMW Water Hose -
This item fits the following BMW Chassis:
E38

Fits BMW Engines including:
M73,M73N

BMW Engine Water Hose 11531711877

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T#:6947

Part#: 11531711877

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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

--.

BMW Radiator Hose Kit - 11537505229

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T#:46719191

Part#: CHK0008P

Ships in 4 Business Days

$ 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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URO Radiator Hose - E38, E39

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T#:38094316

Part#: 11531711385

In Stock

$ 47.99 USD

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This radiator hose is routed from the lower left of the radiator and goes to the heat exchanger.

Genuine BMW Coolant Overflow Hose

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T#:360736

Part#: 17111427156

Ships in 3 Business Days

5% off MSRP $ 79.99

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$ 75.99 USD

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$ 79.99

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$ 75.99 USD

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Genuine BMW Radiator Hose - Lower - E38 740i 740iL E39 540i

For vehicles with production date up to 09/1998

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T#:13006

Part#: 11531741409

Ships in 3 Business Days

2% off MSRP $ 45.99

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$ 44.99 USD

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WATER HOSE:115050

Genuine BMW Expansion Tank Hose - E39 540i E38 740iL 740i E31 840Ci ...

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T#:367696

Part#: 11531741404

Ships in 3 Business Days

$ 34.99 USD

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Genuine BMW Coolant Hose - E38 740i 740iL E39 540i

For vehicles with production date up to 09/1998

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T#:360686

Part#: 11531745595

Ships in 3 Business Days

2% off MSRP $ 45.99

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$ 44.99 USD

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$ 45.99

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$ 44.99 USD

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Genuine BMW Coolant Hose - E38 740i 740iL

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T#:11089

Part#: 64218390319

Ships in 3 Business Days

5% off MSRP $ 40.99

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$ 38.99 USD

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$ 40.99

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$ 38.99 USD

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Genuine BMW Hose F Radiator And Engine Return -
This item fits the following BMW Chassis:
E38

Genuine BMW Coolant hose - E38 750iL M73 5.4L

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T#:150847

Part#: 64218390355

Ships in 3 Business Days

4% off MSRP $ 25.99

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$ 24.99 USD

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$ 25.99

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$ 24.99 USD

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Genuine BMW Hose F Engine Inlet And Addit.Water Pump -
This item fits the following BMW Chassis:
E38

Genuine BMW Water Pipe - E38 740i 740iL E39 540i

For vehicles with production date from 09/1998

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T#:367678

Part#: 11531711384

Ships in 3 Business Days

6% off MSRP $ 85.99

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$ 80.99 USD

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6% off MSRP

$ 85.99

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$ 80.99 USD

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Genuine BMW Radiator Hose - Upper - E38 750iL M73 5.4L

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T#:35943

Part#: 11531741415

Ships in 3 Business Days

2% off MSRP $ 45.99

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$ 44.99 USD

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2% off MSRP

$ 45.99

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$ 44.99 USD

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Genuine BMW Water Hose -
This item fits the following BMW Chassis:
E38

Fits BMW Engines including:
M73

Genuine BMW Coolant line - E38

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T#:20331

Part#: 64218377662

Ships in 5 Business Days

6% off MSRP $ 32.99

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$ 30.99 USD

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6% off MSRP

$ 32.99

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$ 30.99 USD

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Genuine BMW Hose F Water Valve And Right Radiator -
This item fits the following BMW Chassis:
E38

Genuine BMW Radiator Return Hose - E38 750iL

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T#:150846

Part#: 64218390354

Ships in 6 Business Days

5% off MSRP $ 36.99

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$ 34.99 USD

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$ 36.99

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$ 34.99 USD

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Genuine BMW Hose F Radiator And Engine Return -
This item fits the following BMW Chassis:
E38

Coolant Pipe - Return Line - E38

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T#:35891

Part#: 11531711885

Ships in 6 Business Days

6% off MSRP $ 141.99

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

$ 133.99 USD

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6% off MSRP

$ 141.99

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$ 133.99 USD

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Genuine BMW Coolant Pipe, Return Line -
This item fits the following BMW Chassis:
E38

Fits BMW Engines including:
M73N

Genuine BMW Coolant Crossover Pipe

For vehicles with a production date from 09/1998

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T#:35866

Part#: 11531437493

Ships in 5 Business Days

5% off MSRP $ 358.99

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

$ 339.99 USD

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5% off MSRP

$ 358.99

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

$ 339.99 USD

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Genuine BMW Cooling System Accumulator -
This item fits the following BMW Chassis:
E38,E39,E53 X5

Fits BMW Engines including:
M62

Genuine BMW Upper Radiator Hose - E38 750iL M73 5.4L

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T#:367679

Part#: 11531711877

Ships in 7 Business Days

$ 77.99 USD

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$ 77.99 USD

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Genuine BMW Coolant Transfer Pipe

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T#:35937

Part#: 11531741202

Special Order: No Guaranteed ETA

6% off MSRP $ 100.99

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

$ 94.99 USD

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$ 100.99

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$ 94.99 USD

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Genuine BMW Pipe -
This item fits the following BMW Chassis:
E38,E39,E53 X5

Fits BMW Engines including:
M62

70-90mm 3/8"/9mm Band Hose Clamp

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T#:363017

Part#: 003402ECS06A-11

In Stock

Sale - Save 40% $ 6.99

This product was last offered at the strikethrough price on
05-02-2026

$ 4.19 USD

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Upgrade your BMW with ECS Tuning's Stainless Steel Hose Clamps, designed for convenience and durability. With various band widths and German-style T-bolts, these clamps offer easy adjustment to your required diameter. Say goodbye to dealer pricing and enjoy the quality you love at ECS Tuning.

Full stainless steel construction
Various band widths available
German-style T-bolts for easy adjustment
Convenient solution for hose clamp replacement

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Bremmen Coolant Bleeder Screw - BMW E30 E36 E38 E39 E46 E83 E90 Z4 ...

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T#:640140

Part#: 17111712788

In Stock

Sale - Save 39% $ 3.99

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05-03-2026

$ 2.44 USD

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$ 3.99

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Plastic bleeder screw for cooling system is used to bleed air that would otherwise create an air pocket and lead to overheating. Includes o-ring seal.

Genuine BMW Coolant Bleeder Screw 17111712788

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T#:7432

Part#: 17111712788

In Stock

$ 5.94 USD

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This is the Genuine BMW Coolant bleeder screw. We recommend a heavy duty Aluminum replacement from ECS Tuning if you do not want to replace this part again when it fails.

Genuine BMW Vent Screw
This item fits the following BMW Chassis:
E36 M3,E46 M3,E85 Z4M,E53 48IS,E30,E34,E36,E38,E39,E46,E53 X5 X5,E83 X3,E85 Z4,E86 Z4,E90

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Band Hose Clamp | 12-20mm 3/8"/9mm

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T#:304266

Part#: 003402ECS06A-03

In Stock

Sale - Save 40% $ 4.99

This product was last offered at the strikethrough price on
05-02-2026

$ 2.99 USD

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$ 4.99

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$ 2.99 USD

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Secure hoses in your BMW effortlessly with the ECS 3/8" / 9mm Band Hose Clamp (12-20mm). Specifically designed for BMW models, this clamp ensures a snug fit and reliable hold for hoses measuring between 12mm to 20mm. Crafted with durable materials, these clamps provide exceptional resistance against leaks and are ideal for various automotive applications. Upgrade your BMW's hose security with these reliable ECS hose clamps.

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3/8"/9mm Band Hose Clamp - 50-70mm

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T#:341684

Part#: 003402ECS06A-12

In Stock

Sale - Save 40% $ 6.99

This product was last offered at the strikethrough price on
05-02-2026

$ 4.19 USD

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Elevate your BMW maintenance with ECS Tuning's 304 stainless steel hose clamps, offering convenience and top-quality performance at an affordable price. Designed with various band widths and German-style T-bolts for adjustable sizing, these hose clamps ensure a secure fit for your specific diameter needs. Skip the dealership wait and excessive pricing; ECS Tuning provides reliable, dealership-quality hose clamps without the premium cost, ensuring your car receives the care it deserves.

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Radiator Hose - Lower

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T#:39768309

Part#: 11531741409

In Stock

Sale - Save 22% $ 19.99

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

$ 15.50 USD

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$ 19.99

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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

$ 17.22

This product was last offered at the strikethrough price on
05-02-2026

$ 15.99 USD

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$ 17.22

This product was last offered at the strikethrough price on
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This item fits the following BMWs:
1997-1998   E39 BMW   540i
1996-1998   E38 BMW   740i 740il

60-80mm 1/2"/12mm Band Hose Clamp

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T#:377836

Part#: 003402ECS05A-10

In Stock

Sale - Save 40% $ 6.99

This product was last offered at the strikethrough price on
05-02-2026

$ 4.19 USD

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Qty

Sale - Save 40%

$ 6.99

This product was last offered at the strikethrough price on
05-02-2026

$ 4.19 USD

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ECS Tuning Stainless Steel Hose Clamps for BMW

Upgrade your BMW's hose clamps with ECS Tuning Stainless Steel Hose Clamps, designed for convenience and durability. Say goodbye to long waits and overpriced dealership clamps. With various band widths available, these stainless steel clamps ensure a secure fit for your vehicle's hoses.

Benefits:

Convenient replacement for worn-out hose clamps
Made of durable stainless steel for long-lasting performance
Available in various band widths for versatile use
Affordable alternative to dealership pricing

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Rein Expansion Tank Hose - E31, E38, E39

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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:375756

Part#: 11531741404

In Stock

$ 8.45 USD

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$ 8.45 USD

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Connects the expansion tank to the radiator

40-60mm 3/8"/9mm Band Hose Clamp

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T#:341280

Part#: 003402ECS06A-08

In Stock

Sale - Save 40% $ 3.99

This product was last offered at the strikethrough price on
05-02-2026

$ 2.39 USD

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Qty

Sale - Save 40%

$ 3.99

This product was last offered at the strikethrough price on
05-02-2026

$ 2.39 USD

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ECS Tuning 304 Stainless Steel Hose Clamps

Revolutionize your car maintenance with ECS Tuning's premium 304 stainless steel hose clamps. Eliminate dealership delays and inflated prices! These German-style clamps utilize T-bolts for hassle-free diameter adjustment. With various band widths available, these durable clamps ensure reliability without the hefty cost. Experience dealership-quality products at affordable rates, exclusively at ECS Tuning.

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Gasket Ring

A18X22

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T#:6495

Part#: 07119963300

In Stock

$ 1.99 USD

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$ 1.99 USD

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GENUINE BMW GASKET RING 07119963300

Rein Coolant Bleeder Screw CHW1575 - Priced Each

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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

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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90-110mm 3/8"/9mm Band Hose Clamp

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T#:341281

Part#: 003402ECS06A-13

In Stock

Sale - Save 40% $ 6.99

This product was last offered at the strikethrough price on
05-02-2026

$ 4.19 USD

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Qty

Sale - Save 40%

$ 6.99

This product was last offered at the strikethrough price on
05-02-2026

$ 4.19 USD

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ECS Tuning 304 Stainless Steel Hose Clamps

Once again, ECS Tuning has found a way to make life easier for working on your car. Need new hose clamps but don't want to wait to order it from the dealership or pay more than you should for a hose clamp? That's where we come in! These are full 304 stainless steel hose clamps with various band widths for your convenience. They are German style using T-bolts to adjust in size to your required diameter. Never pay dealer pricing again, but still get the quality you love here at ECS Tuning.

Made from high-quality 304 stainless steel for durability
German-style design with T-bolts allows for easy size adjustment
Various band widths for versatile use
Avoid dealership pricing without compromising on quality
Perfect for BMW enthusiasts seeking affordable yet reliable hose clamps

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1/2"/12mm Band Hose Clamp - 25-40mm - Priced Each

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T#:385425

Part#: 003402ECS05A-06

In Stock

Sale - Save 35% $ 4.99

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

$ 3.24 USD

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Qty

Sale - Save 35%

$ 4.99

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

$ 3.24 USD

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Upgrade Your BMW Maintenance with Stainless Steel Hose Clamps from ECS Tuning

ECS Tuning introduces premium full stainless steel hose clamps, offering superior quality and convenience for your BMW maintenance. Avoid dealership delays and overpricing by choosing from a selection of band widths, ensuring you receive top-quality hose clamps without overpaying.

Key Benefits:

Premium full stainless steel hose clamps
Various band widths for enhanced convenience
High-quality alternative to dealership pricing
Readily available stock eliminates waiting time

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Genuine BMW Hose Clamp 07129952104

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T#:6533

Part#: 07129952104

In Stock

$ 3.99 USD

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$ 3.99 USD

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GENUINE BMW HOSE CLAMP 07129952104

77-85mm - 3/4" Band Hose Clamp

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T#:377877

Part#: 003402ECS07A-05

In Stock

Sale - Save 40% $ 24.99

This product was last offered at the strikethrough price on
05-02-2026

$ 14.99 USD

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Qty

Sale - Save 40%

$ 24.99

This product was last offered at the strikethrough price on
05-02-2026

$ 14.99 USD

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Upgrade your BMW's hose clamps with the 77-85mm - 3/4" Band Hose Clamp from Turner Motorsport. These full 304 stainless steel clamps offer convenience and quality without the dealership price tag. German-style T-bolts allow for easy adjustment to your required diameter, ensuring a secure fit every time.

Made of durable 304 stainless steel for long-lasting performance
German-style T-bolt design for easy size adjustment
Convenient band widths for versatile applications
Quality alternative to dealership pricing

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70-78mm - T-Bolt Hose Clamp - Priced each

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T#:380416

Part#: 003402ECS07A-03

In Stock

Sale - Save 40% $ 30.99

This product was last offered at the strikethrough price on
05-02-2026

$ 18.59 USD

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Qty

Sale - Save 40%

$ 30.99

This product was last offered at the strikethrough price on
05-02-2026

$ 18.59 USD

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Ensure a tight and leak-free seal in your BMW's cooling, vacuum, or intake systems by installing a new adjustable hose clamp. Over time, clamps can deform or lose their tightness due to aging or frequent removal, potentially causing leaks in your coolant or vacuum hoses. Avoid the risk of leaks by replacing old clamps with new hardware, offering peace of mind against coolant and vacuum system issues.

Key benefits of the adjustable hose clamp include: