BMW Coolant & Radiator Hoses for BMW Z Series E85/6 (2003-2008)

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We offer replacement hoses from several OE brands that we trust, along with performance silicone upgrades for those who want increased wear resistance compared to factory rubber.
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OEM Style Hose Clamps
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Turner Motorsport - Corporate Logo
T#:338927
Part#: HOSE-CLAMPS
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Starting at $ 3.59 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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Rein Aluminum Coolant Hose Flange - E82, E88, E90, E91, E92, E93 ...
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Rein - Corporate Logo
T#:593535
Part#: CHC0609
In Stock
$ 21.99 USD
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Made from high-strength aluminum vs the OEM plastic prone to failure.
Race German - Corporate Logo
T#:6827887
Part#: RGCTSAM12
In Stock
$ 30.00 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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Bavarian Autosport - Corporate Logo
T#:638085
Part#: 11537502525
In Stock
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$ 37.49 USD
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Sale - Save 25% $ 49.99
$ 37.49 USD
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This plastic water pipe is positioned directly underneath your intake manifold. Due to its plastic construction, it is notorious for catastrophic failure. Rapid cooling loss and overheating are both direct results of this failure, posing permanent and lasting damage to the engine.

Replace your cracked/broken coolant pipe with this high-quality Bavarian Autosport component to ensure long-term reliability and perfect fitment.

From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Genuine BMW - Corporate Logo
T#:6939
Part#: 11531705210
In Stock
Sale - Save 5% $ 59.98
$ 56.98 USD
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This is the Genuine BMW 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.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1999-2003 E39 BMW 525i 528i 530i
2004-2006 E83 BMW X3 2.5i X3 3.0i - M54 engine
2000-2006 E53 BMW X5 3.0i
1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
2003-2005 E85 BMW Z4 2.5i Z4 3.0i
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Heater Inlet Pipe
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Rein - Corporate Logo
T#:594330
Part#: 11531705210
In Stock
$ 31.99 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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Precision Raceworks - Corporate Logo
T#:38094360
Part#: 601-0003
In Stock
New Item
$ 24.99 USD
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The Black Market Parts (by Precision Raceworks) BMW Billet Coolant Flange was designed as a replacement for the factory plastic flange that is found in the hose that connects the thermostat to the cylinder head. The plastic flange commonly cracks, which leads to coolant loss and engine overheating. Replace your coolant flange before disaster occurs and leaves you stuck on the side of the road.
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Race German - Corporate Logo
T#:6827888
Part#: RGCTSA1/8NPT
Ships in 2 Business Days
$ 30.00 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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BMW M52 M54 Water Pipe
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Rein - Corporate Logo
T#:594294
Part#: 11537502525
In Stock
$ 44.99 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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Genuine BMW - Corporate Logo
T#:7453
Part#: 17112248409
Ships Jul 1, 2025
2% off MSRP $ 50.99
$ 49.99 USD
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2% off MSRP $ 50.99
$ 49.99 USD
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Genuine BMW Coolant Connection Fitting -
This item fits the following BMW Chassis:
E83 X3,E85,E86

Fits BMW Engines including:
M54,N52,N52N

Genuine BMW - Corporate Logo
T#:22338
Part#: 11537836597
Ships Jul 1, 2025
$ 55.99 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 - Corporate Logo
T#:360692
Part#: 11537521049
Ships Jul 1, 2025
Sale - Save 4% $ 67.99
$ 65.17 USD
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$ 65.17 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.


Heater Inlet Pipe
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Febi - Corporate Logo
T#:594084
Part#: 11531705210
Ships Jul 15, 2025
$ 46.99 USD
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Runs from the front left side of the engine to the heater inlet
Rein Radiator Hose - Lower - Z4
For roadster models with production date up to 04/2004
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Rein - Corporate Logo
T#:402423
Part#: 17127514405
Ships Jul 22, 2025
$ 29.57 USD
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$ 29.57 USD
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Keep your cooling system leak free
OEM Rein Upper Radiator Hose - Z4 Roadster
Roadster models only
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Rein - Corporate Logo
T#:362445
Part#: 17127514404
Ships Jul 22, 2025
$ 46.43 USD
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$ 46.43 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.

Bremmen Parts - Corporate Logo
T#:36032354
Part#: 11537516414
Ships on Aug 4, 2025
New Item
$ 20.99 USD
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URO - Heater Inlet Pipe - E46, Z3, E39
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URO - Corporate Logo
T#:34080697
Part#: 11531705210
Back Ordered
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$ 25.83 USD
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This runs from the front left side of the cylinder head under the intake manifold toward the firewall.
Bremmen Parts O-Ring
Found at the flange end of the upper thermostat hose
Bremmen Parts - Corporate Logo
T#:399143
Part#: 11537545278
In Stock
$ 6.99 USD
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$ 6.99 USD
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Seals your cooling system

OEM Rein Coolant Pipe Inlet Hose Section - N52
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Rein - Corporate Logo
T#:388662
Part#: 11537516414
In Stock
$ 16.99 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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Victor Reinz O-Ring
Found at the flange end of the upper thermostat hose
Victor Reinz - Corporate Logo
T#:388687
Part#: 11537545278
In Stock
$ 5.99 USD
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$ 5.99 USD
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Seals your cooling system

Bremmen Parts - Corporate Logo
T#:640140
Part#: 17111712788
In Stock
$ 4.99 USD
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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.

URO Coolant Pipe O-Ring - BMW N52 3.0L
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URO - Corporate Logo
T#:37892133
Part#: 11517514942
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$ 1.59 USD
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$ 1.59 USD
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URO Coolant Pipe O-Ring - BMW N52 3.0L

Engineered to meet OE coolant pipe o-ring dimensions, the URO Coolant Pipe O-Ring ensures easy installation and a perfect fit for BMW N52 3.0L engines. It is designed to resist cooling system heat and antifreeze, providing reliable performance under demanding conditions. Constructed from durable ECD (Electro Chemical Degradation)-resistant EPDM material, it helps prevent electrolysis, extending the lifespan of your cooling system. With a temperature rating of -40º F to 275º F (-40º C to 135º C), this o-ring is built to withstand extreme temperatures. Supported by a 24-month unlimited mileage warranty, it is a dependable solution for maintaining your BMW’s cooling system efficiency.

Key Benefits:

  • Precision-molded to OE dimensions for easy installation and perfect fit.
  • Resists cooling system heat and antifreeze for reliable performance.
  • Durable ECD-resistant EPDM material prevents electrolysis.
  • Temperature rating of -40º F to 275º F for extreme condition durability.
  • Includes a 24-month unlimited mileage warranty for peace of mind.
  • Specifically designed for BMW N52 3.0L engines.
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70-90mm 3/8"/9mm Band Hose Clamp
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ECS - Corporate Logo
T#:363017
Part#: 003402ECS06A-11
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$ 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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Genuine BMW - Corporate Logo
T#:6533
Part#: 07129952104
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$ 2.55 USD
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GENUINE BMW HOSE CLAMP 07129952104


1/2"/12mm Band Hose Clamp - 25-40mm - Priced Each
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ECS - Corporate Logo
T#:385425
Part#: 003402ECS05A-06
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$ 2.99 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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3/8"/9mm Band Hose Clamp - 50-70mm
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ECS - Corporate Logo
T#:341684
Part#: 003402ECS06A-12
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$ 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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Genuine Volkswagen Audi - Corporate Logo
T#:26038596
Part#: N02035327
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$ 12.03 USD
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$ 12.03 USD
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Experience optimal performance in your BMW with the replacement of vacuum hoses. Vacuum leaks can disrupt engine operation, affecting fuel efficiency and idle stability. Don't let damaged hoses compromise your driving experience. Replace them with high-quality replacements to restore your BMW's performance.
  • Improve engine operation
  • Enhance fuel efficiency
  • Ensure stable idle
  • High-quality replacement for damaged hoses
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Genuine BMW - Corporate Logo
T#:7432
Part#: 17111712788
In Stock
$ 3.99 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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60-80mm 1/2"/12mm Band Hose Clamp
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ECS - Corporate Logo
T#:377836
Part#: 003402ECS05A-10
In Stock
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$ 4.19 USD
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$ 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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Hose Clamp 2 5/16" - 3 1/4" - priced each
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ECS - Corporate Logo
T#:376806
Part#: 54155K23
In Stock
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$ 4.20 USD
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$ 4.20 USD
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Hose Clamp 2 5/16" - 3 1/4"

Ensure secure hose connections with the Hose Clamp 2 5/16" - 3 1/4", a versatile and reliable solution for various applications. Crafted from durable materials, this clamp offers superior strength and corrosion resistance. Its adjustable design allows for a snug fit, reducing the risk of leaks and ensuring optimal performance. Upgrade your hose connections with the precision and reliability of the Hose Clamp 2 5/16" - 3 1/4".

  • Versatile and reliable solution for various applications
  • Superior strength and corrosion resistance
  • Adjustable design for a snug fit
  • Reduces risk of leaks for optimal performance
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Rein Coolant Hose - E60, E61, E70, E82, E83, E88, E90, E91, E92, E93,...
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Rein - Corporate Logo
T#:348982
Part#: 11537521049
In Stock
$ 15.99 USD
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Connects from the water pump to the thermostat
77-85mm - 3/4" Band Hose Clamp
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ECS - Corporate Logo
T#:377877
Part#: 003402ECS07A-05
In Stock
Sale - Save 40% $ 23.99
$ 14.39 USD
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$ 14.39 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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Band Hose Clamp | 12-20mm 3/8"/9mm
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ECS - Corporate Logo
T#:304266
Part#: 003402ECS06A-03
In Stock
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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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70-78mm - T-Bolt Hose Clamp - Priced each
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ECS - Corporate Logo
T#:380416
Part#: 003402ECS07A-03
In Stock
Sale - Save 40% $ 29.99
$ 17.99 USD
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$ 17.99 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:

  • Maintaining a secure and leak-free seal in your BMW's systems.
  • Preventing coolant or vacuum leaks that can affect performance.
  • Adjustable size from 70mm to 78mm for versatile applications.

Upgrade your hose clamps to ensure optimal performance and reliability in your BMW's systems.

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90-110mm 3/8"/9mm Band Hose Clamp
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ECS - Corporate Logo
T#:341281
Part#: 003402ECS06A-13
In Stock
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$ 0.99 USD
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$ 0.99 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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40-60mm 3/8"/9mm Band Hose Clamp
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ECS - Corporate Logo
T#:341280
Part#: 003402ECS06A-08
In Stock
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$ 1.79 USD
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$ 1.79 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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Victor Reinz - Corporate Logo
T#:388664
Part#: 11517514942
In Stock
$ 4.99 USD
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Is your water pump hose leaking where the hose connects to the engine? Most likely this seal has failed and needs to be replaced.
Febi Coolant Hose - E60, E61, E70, E82, E83, E88, E90, E91, E92, E93,...
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Febi - Corporate Logo
T#:392570
Part#: 11537521049
In Stock
$ 10.99 USD
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Connects from the water pump to the thermostat
Rein Coolant Bleeder Screw CHW1575 - Priced Each
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Rein - Corporate Logo
T#:591955
Part#: 17111712788
In Stock
$ 2.99 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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Vaico Lower Radiator Hose - BMW Z4 2.5 3.0 M54
For roadster models with production date up to 04/2004
We Price Match - Give Us A Call or Chat!
Vaico - Corporate Logo
T#:363540
Part#: 17127514405
In Stock
$ 73.99 USD
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$ 73.99 USD
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Replace your leaking coolant hose and prevent engine overheating with this replacement Vaico coolant hose.

URO Premium - Corporate Logo
T#:554118
Part#: 11537516414
Ships in 2 Business Days
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$ 13.17 USD
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$ 13.17 USD
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Subject to the ravages of heat cycling during each driving cycle - rubber hoses are more susceptible to wear and fatigue than aluminum piping. BMW utilized a single part number for their aluminum pipe and hose combination - making this part typically over $100 to replace. Rein to the rescue! By supplying just the rubber component, repairs can be made quickly and cost effectively (and without the waste of scraping a perfectly good aluminum pipe!) Includes both hose clamps and rubber hose.
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Genuine BMW - Corporate Logo
T#:35671
Part#: 11517514942
Ships in 1-2 days
$ 12.99 USD
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Genuine BMW O-Ring -
This item fits the following BMW Chassis:
E70 X5,E82,E83 X3,E85,E86,E89 Z4,E90,E92,E93,F10,F25 X3

Fits BMW Engines including:
N51,N52,N52N

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OEM Rein Coolant Hose - E60 E61 E83 Z4
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Rein - Corporate Logo
T#:583591
Part#: 11537519494
Ships Jul 22, 2025
$ 16.99 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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Rein Radiator Hose - Lower - Z4
For roadster models with production date from 04/2004
2X Entries For Our Spin To Win Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:386347
Part#: 17127535591
Ships Jul 22, 2025
$ 51.99 USD
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$ 51.99 USD
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Keep your cooling system leak free

Meyle Coolant Hose - BMW N52 3.0L
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Meyle - Corporate Logo
T#:35829327
Part#: 11537521049
Special Order: No Guaranteed ETA
New Item
$ 20.99 USD
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Over time, coolant hoses in your vehicle can deteriorate due to prolonged exposure to high temperatures from the coolant. Made of reinforced rubber, these hoses are prone to issues such as splitting at hose clamps, swelling, cracking, or even breaking, which can leave you stranded. It's important to replace them at the first sign of wear to prevent coolant loss and ensure your engine stays properly cooled.
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Bremmen Parts - Corporate Logo
T#:38621425
Part#: 11537521049
Special Order: No Guaranteed ETA
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Sale - Save 25% $ 16.99
$ 12.74 USD
Free Shipping on orders $49 and up
Sale - Save 25% $ 16.99
$ 12.74 USD
Free Shipping on orders $49 and up