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BMW Cooling System Parts & Accessories for BMW Z Series E85/6 (2003-2008)

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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 Style Hose Clamps

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T#:338927

Part#: HOSE-CLAMPS

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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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BMW M52 M54 Water Pipe

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T#:594294

Part#: 11537502525

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$ 53.19 USD

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BMW M52 M54 Water Pipe is an essential replacement part designed to ensure long-term reliability and optimal performance for your BMW's cooling system. Engineered to replace cracked or broken coolant pipes, this high-quality water pipe from Turner Motorsport guarantees a perfect fit and dependable service. Investing in this replacement pipe helps prevent overheating and potential engine damage, maintaining your vehicle's performance and longevity.

Reliable replacement: Designed to replace cracked or broken coolant pipes for improved engine cooling.
Optimal fitment: Engineered to ensure a perfect fit and seamless installation.
Durable construction: Built with high-quality materials to withstand engine temperatures and environmental conditions.
Preventative maintenance: Helps avoid overheating and potential engine damage by ensuring a reliable coolant flow.
Vehicle compatibility: Specifically designed for BMW M52 and M54 engine models.

Upgrade your BMW’s cooling system with the BMW M52 M54 Water Pipe from Turner Motorsport for enhanced reliability and performance.

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Heater Inlet Pipe

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T#:594330

Part#: 11531705210

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$ 40.27 USD

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This is the plastic heater inlet pipe that connects the cylinder head to the heater inlet on cars with the M52 or M54 engine.The plastic on this hose becomes brittle over time and eventually leads to failure.

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Genuine BMW Thermostat With Housing - M52 M54

T#:360689

Part#: 11537509227

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Sale - Save 8% $ 169.69

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

$ 156.96 USD

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Genuine BMW Radiator Hose - Lower - Z4 2.5i 3.0i M54

For roadster models with production date up to 04/2004

T#:22531

Part#: 17127514405

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$ 91.99 USD

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$ 99.99

This product was last offered at the strikethrough price on
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$ 91.99 USD

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Genuine BMW Water Hose -
This item fits the following BMW Chassis:
E85

Fits BMW Engines including:
M54

Genuine BMW Radiator Support Bracket - E92 Z4 E65 E60 E53 E46 E66 E83...

T#:21736

Part#: 17117514402

Ships in 4 Business Days

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$ 24.86 USD

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Genuine BMW Bracket F.Radiator
This item fits the following BMW Chassis:
E46 M3,E85 Z4M,E53 48IS,E46,E53 X5 X5,E65,E83 X3,E85 Z4,E86 Z4,E90,E92,E93

Genuine BMW Radiator Bracket - Lower - E46

T#:21734

Part#: 17111436264

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$ 30.54 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

Additional Water Pump - E90, E92, E93, Z4

T#:24649

Part#: 64118369806

In Stock

Sale - Save 8% $ 279.99

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

$ 258.45 USD

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$ 279.99

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$ 258.45 USD

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Genuine BMW Additional Water Pump
This item fits the following BMW Chassis:
E85 Z4M,E85 Z4,E86 Z4,E90,E92,E93

Genuine BMW Coolant Hose - N52 3.0L

T#:360692

Part#: 11537521049

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Sale - Save 11% $ 73.99

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$ 65.99 USD

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This product was last offered at the strikethrough price on
07-16-2026

$ 65.99 USD

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This is a Genuine BMW coolant host that connects from the water pump to the thermostat. Replace your leaking coolant hose to prevent overheating issues and coolant loss.

Rein Radiator Hose - Lower - Z4

For roadster models with production date up to 04/2004

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T#:402423

Part#: 17127514405

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$ 28.49 USD

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Keep your cooling system leak free

Engine Coolant Recovery Tank Hose - Z4

T#:22338

Part#: 11537836597

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Sale - Save 9% $ 55.99

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$ 51.19 USD

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Genuine BMW Water Hose
This item fits the following BMW Chassis:
E85 Z4M,E85 Z4,E86 Z4

Fits BMW Engines including:
S54

Genuine BMW Radiator Mounting Plate for Expansion Tank - Z4

T#:45825

Part#: 17112248408

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$ 87.93 USD

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Genuine BMW Mounting Plate -
This item fits the following BMW Chassis:
E85,E86

Fits BMW Engines including:
M54,N52

Genuine BMW Water Pump Pulley

T#:4472

Part#: 11511436590

In Stock

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

$ 68.99 USD

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$ 68.99 USD

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SEE T#337981

Genuine BMW Low Radiator Hose - Z4 N52

T#:19533

Part#: 17127545263

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Sale - Save 10% $ 88.99

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$ 79.70 USD

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$ 79.70 USD

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Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

Genuine BMW radiator hoses are always a perfect option when performing maintenance thanks to their high quality and longevity.

This item fits the following BMW Chassis:
E85,E86

Fits BMW Engines including:
N52

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OEM Rein Upper Radiator Hose - Z4 Roadster

Roadster models only

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T#:362445

Part#: 17127514404

Ships in 2 Business Days

Sale - Save 5% $ 51.99

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$ 49.39 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.

Expansion Tank Mounting Bracket - E46 E85 Z4 - Auto Trans

For vehicles with automatic transmission only

T#:12560

Part#: 17111436251

In Stock

Sale - Save 51% $ 205.99

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

$ 101.32 USD

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This Genuine BMW part is the mounting bracket from the radiator to the expansion tank on E46 3 series and E85/E86 Z4 with Automatic Transmission.

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:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si

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Thermostat With Housing

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T#:582356

Part#: 11537509227

Ships in 4 Business Days

Sale - Save 5% $ 89.99

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08-31-2026

$ 85.49 USD

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Stop leaks before they start with this new Thermostat With Housing from Rein.

Rein Expansion Tank Mounting Plate - E46, Z4

For vehicles with automatic transmission only

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T#:402139

Part#: 17111436251

Ships in 2 Business Days

Sale - Save 5% $ 80.99

This product was last offered at the strikethrough price on
08-31-2026

$ 76.94 USD

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Mounts to the side of the radiator for retaining the expansion tank

Rein Coolant Bleeder Screw CHW1575 - Priced Each

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T#:591955

Part#: 17111712788

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$ 3.87 USD

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$ 4.99

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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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Aluminum Screws for N52 N54 Water Pump

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T#:2253

Part#: 11510392553

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$ 6.77 USD

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These aluminum water pump screws are single use and must be replaced each time they are removed. These are used on all 325i, 328i, and 330i with the BMW N51 N52 and N53 engines. They were also used on some early N54 engines that have rubber mounts on the water pump housing. Do not use these bolts if your N54 water pump has been replaced with a housing that does not have the rubber mounts.

In German, Rein means Pure. In the automotive industry the Rein name has quickly come to represent quality. With fitments for some of the world’s finest automobiles including BMW and Mini and guaranteed OE quality, Rein is a name you can trust.

This item fits the following BMWs:
2008+ E82 BMW 128i 135i
2007+ E9X BMW 325i 325xi 328i 328xi 330i 335i 335xi
2006+ E60 BMW 525i 525xi 528i 528xi 530i 530xi 535i 535xi
2006+ X3 BMW X3 3.0i X3 3.0si
2006+ Z4 BMW Z4 3.0i Z4 3.0si

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Rein Coolant Hose - E60, E61, E70, E82, E83, E88, E90, E91, E92, E93,...

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T#:348982

Part#: 11537521049

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08-31-2026

$ 17.09 USD

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$ 17.99

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Connects from the water pump to the thermostat

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

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T#:340541

Part#: 17111742231

Ships in 2 Business Days

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$ 17.09 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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OEM Rein Coolant Pipe Inlet Hose Section - N52

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T#:388662

Part#: 11537516414

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$ 18.99 USD

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Cooling hoses tend to crack over time after going through countless heating and cooling cycles. This can lead to leaks or air bubbles in the cooling system that lead too coolant loos, hurts cooling potential, or could possibly cause damage from excess heat.

Fits the following BMWs:
Submodels with N52 3.0L engine.

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Water Pump

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T#:46478542

Part#: WPR0046

Ships in 4 Business Days

Sale - Save 5% $ 795.99

This product was last offered at the strikethrough price on
08-31-2026

$ 755.36 USD

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$ 795.99

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$ 755.36 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. This water pump fits many 2006 and newer BMW 6 cylinder engines, specifically all the BMWs with the N51, N52, N53 engines. You will also need to purchase replacement aluminum screws Part #11510392553

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Rein Radiator Hose - Lower - Z4

For roadster models with production date from 04/2004

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T#:386347

Part#: 17127535591

In Stock at Vendor

Sale - Save 5% $ 59.99

This product was last offered at the strikethrough price on
08-31-2026

$ 56.99 USD

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$ 59.99

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$ 56.99 USD

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Keep your cooling system leak free

OEM Rein Coolant Hose - E60 E61 E83 Z4

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T#:583591

Part#: 11537519494

Ships in 5 Business Days

Sale - Save 5% $ 18.99

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$ 18.04 USD

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$ 18.99

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$ 18.04 USD

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Attaches from inlet pipe to heat exchanger. 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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Water Pump Service Kit

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T#:57616363

Part#: 115175869259

Ships in 4 Business Days

Sale - Save 5% $ 1,687.99

This product was last offered at the strikethrough price on
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$ 1,603.14 USD

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$ 1,687.99

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$ 1,603.14 USD

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Protect your high-performance driving machine from the devastating consequences of thermal overload with the Rein Water Pump Service Kit.

Water Pump Service Kit

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T#:57616365

Part#: 115175869253

Ships in 4 Business Days

Sale - Save 5% $ 1,265.99

This product was last offered at the strikethrough price on
08-31-2026

$ 1,202.05 USD

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$ 1,202.05 USD

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Engineered to deliver factory-level reliability, the Rein Electric Water Pump Service Kit is an essential maintenance upgrade for your BMW.

Water Pump Service Kit

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T#:57616366

Part#: 115175869251

Ships in 4 Business Days

Sale - Save 5% $ 1,326.99

This product was last offered at the strikethrough price on
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$ 1,260.18 USD

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$ 1,326.99

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$ 1,260.18 USD

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Refresh your cooling setup with full confidence and protect your investment against heat-induced power loss.

Water Pump Service Kit

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T#:57616362

Part#: 1151758692550

Ships in 4 Business Days

Sale - Save 5% $ 1,264.99

This product was last offered at the strikethrough price on
08-31-2026

$ 1,201.28 USD

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$ 1,264.99

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$ 1,201.28 USD

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This CRP/Rein service kit offers an all-in-one overhaul solution designed to restore maximum cooling system integrity.

Radiator Support Bracket

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T#:14122755

Part#: 17117514402

Back Ordered

Sale - Save 13% $ 8.99

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

$ 7.83 USD

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Mounts to top of radiator bracket, 2 per vehicle.

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