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BMW Cooling System Parts & Accessories for BMW 1 Series E82 (2008-2013)

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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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Thermostat

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T#:15511826

Part#: 11537549476

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Overheating your N52 or N54 engine can be detrimental to the longevity of your engine. We also recommend replacing your hardware 07119903851 x2

Upper Radiator Hose - E9x E82 E89 With N52 Engine

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T#:7460

Part#: 17127531579

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This is the upper radiator hose that goes from the engine to the top of the radiator with either N51 or N52 enigne.

This item fits the following BMWs:
2008+ E82 BMW 128i
2006-2011 E90 BMW 325i 325xi 328i 328xi 328i xDrive 330i 330xi - Sedan
2006-2012 E91 BMW 325xi 328i 328xi 328i xDrive - Wagon
2007-2013 E92 BMW 328i 328xi 328i xDrive - Coupe
2007-2013 E93 BMW 328i Convertible
2009+ Z4 BMW Z4 sDrive30i

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Rein Upper Radiator Hose - E82, E88, E90, E92, E93, Z4

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T#:340690

Part#: 17127540127

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The hose that comes off of the top outlet on the radiator

Radiator Hose for N52 / N54 - Lower

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T#:388683

Part#: 17127564478

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Replace split, hard, or bulging hoses

Expansion Tank Vent Hose

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T#:30729012

Part#: 17127618510

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Upper Radiator Hose

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T#:30729022

Part#: 17127540127

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Rein Radiator Hose with Temerature Sensor Fitting - E82 E88 E90 E91 E...

Lower

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T#:583051

Part#: 17127531581

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Radiator to Thermostat Housing

Lower Radiator Hose

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T#:30729018

Part#: 17127564480

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BMW E9X Z4 E8X Coolant Expansion Tank

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T#:402142

Part#: 17137640514

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Includes level sensor

OEM Wahler Thermostat Assembly - E60/61 E82/88 E9X Z4 N51/N52 ...

T#:360363

Part#: 11537549476

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If your vehicle is experiencing cooling issues, chances are the thermostat is the cause. Common symptoms include a prolonged warm-up at highway speeds from the thermostat being stuck open, or consistent overheating issues from the thermostat being stuck in the closed position. Either condition can result in poor performance and potential damage to vital components in your vehicle.

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OEM Rein Expansion Tank Vent Hose - E82/8 E9X N52

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T#:402113

Part#: 17127618510

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Acts as a vent hose between the upper radiator hose and the expansion tank. Runs the length of the top of the radiator.

CRP Radiator Vent Hose - E82, E84, E88, E90, E92, E93

For vehicles with automatic or Double Clutch Transmission

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T#:1195859

Part#: 17127565094

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Located on the top of the radiator

Heater Return Line

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T#:27572099

Part#: 17127548230

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Thermostat

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T#:26538316

Part#: 11537601158

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Coolant Expansion Tank

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T#:592020

Part#: 17137640515

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Includes level sensor

Rein Coolant Hose - E82, E84, E88, E90, E92, E93

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T#:592013

Part#: 17127599450

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Connects your radiator to the thermostat

Rein Radiator Return Hose - E82, E88, E90, E91, E92, E93

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T#:20530

Part#: 64216951946

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HOSE F RADIATOR AND ENGINE R 64216951946 Manufactured by CRP

Coolant return line

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T#:30729019

Part#: 17127548229

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N54 Coolant Outlet Hose - 11537541992

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T#:36981059

Part#: 11537541992

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This coolant outlet hose connects the cylinder head to the thermostat housing and is a critical component of the cooling system. For many N54 owners, the "Mickey Mouse" flange is a common failure point. This plastic connector is vulnerable to degradation from heat, exposure to chemicals, and wear over time.

If your outlet hose has failed or the cylinder head flange is leaking, it’s best to replace the entire assembly for a reliable and long-lasting repair.

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Radiator Hose

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T#:5649971

Part#: 64216951946

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Connects from the top side of the radiator to the expansion tank. Often an overlooked maintenance part.

Radiator Hose - Lower

Lower

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T#:30729025

Part#: 17127531581

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Rein Lower Radiator Hose - E82, E88, E90, E92, E93

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T#:340665

Part#: 17127564480

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The hose that attaches to the bottom of the radiator

Radiator Hose - Upper

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T#:38621422

Part#: 17127531579

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OEM Rein Low Temperature Cooling Module Coolant Hose - BMW E82/88 E9X...

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T#:17738369

Part#: 17127540020

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Coolant hoses can become brittle over time, leading to cracks and leaks. Replace your coolant hose with this OEM Rein hose to prevent leaks and overheating.

Rein Lower Cooling Hose - E82, E88, E90, E91, E92, E93, Z4

For vehicles with automatic transmission only

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T#:402117

Part#: 17117524710

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Connects to lower coolant pipe

OEM Rein Coolant Hose - BMW E82/88 E9X N54 N55 3.0L

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T#:592007

Part#: 17127548203

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Low temperature cooling module hose.

Coolant Hose Assembly

For manual transmission models only

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T#:30729020

Part#: 17127548223

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$ 106.39 USD

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Low Temperature Thermostat - 97C

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T#:33612901

Part#: 11537601158-97C

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Lower Cooling Hose - 17117524710

For vehicles with automatic transmission only

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T#:36913374

Part#: 17117524710

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This hose connects to the lower coolant pipe on the passenger side of vehicles equipped with automatic transmissions.

Coolant Hose

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T#:30729015

Part#: 17127599450

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Coolant Hose

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T#:594291

Part#: 11537584549

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Connects to the thermostat. Replacement from Rein.

Rein Coolant Hose With Metal Flange - E82, E88, E9x - N55

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T#:53750144

Part#: CHU0629

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$ 53.93 USD

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Upgraded Coolant Hose from Rein Featuring Metal Flanges to Reduce Leaks

Coolant Expansion Tank Cap

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T#:36032339

Part#: 17117639020

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Coolant Hose - Priced Each

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T#:30729023

Part#: 17127540020

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Bremmen Parts O-Ring

Found at the flange end of the upper thermostat hose

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T#:399143

Part#: 11537545278

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Seals your cooling system

Coolant Inlet Pipe

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T#:36032354

Part#: 11537516414

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N54 Coolant Hose/Elbow - 11537545665

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T#:36100140

Part#: 11537545665

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This Coolant Hose is located behind the thermostat on N54-equipped BMW models. Due to weak rubber construction and its close proximity to the bank one turbocharger, this hose is a common failure item on high-mileage vehicles.

Whether you are replacing a failed hose or preemptively servicing your cooling system, choose this high-quality replacement from Bremmen Parts for a lasting repair.

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Aluminum Screws for N52 N54 Water Pump

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T#:2253

Part#: 11510392553

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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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Coolant Inlet Hose Section

For vehicles with automatic transmission only

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T#:388669

Part#: 11537558523

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$ 17.09 USD

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Rein Water Pipe - E82, E88, E90, E91, E92, E93

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T#:403979

Part#: 11537545890

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$ 19.94 USD

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Connects from the top of the thermostat housing to the engine block

OEM Rein Coolant Pipe Inlet Hose Section - N52

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T#:388662

Part#: 11537516414

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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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Rein Coolant Outlet Hose W/ Upgraded Aluminum Flange - BMW E82/88 E9X...

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T#:44835448

Part#: CHU0484

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$ 43.70 USD

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Attaches the outlet of the thermostat housing to the cylinder head This hose is notorious for failure at the flange. The plastic flange becomes brittle over time due to numerous heat cycles and often cracks, leading to a major coolant leak. This upgraded option from Rein features an aluminum flange that will not crack or split, ensuring years of operation without the worries of failure.

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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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$ 17.09 USD

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Connects from the water pump to the thermostat

BMW Radiator Hose Kit - 17127531581

2X Entries Into Our F80 M3 Sweepstakes

T#:46719188

Part#: CHK0462

Back Ordered

Sale - Save 5% $ 43.99

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

$ 41.73 USD

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This product was last offered at the strikethrough price on
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$ 41.73 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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Rein Turbo Charger Cooling Hose - Return

2X Entries Into Our F80 M3 Sweepstakes

T#:34080768

Part#: 11537558903

In Stock

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

$ 56.99 USD

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

$ 56.99 USD

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Turbo Charger Cooling Hose - Return is essential for maintaining the efficiency and performance of your turbocharged vehicle. This high-quality return hose is specifically designed to handle the intense heat and pressure generated by the turbocharger system. Manufactured using durable materials, this cooling hose ensures optimal coolant flow to keep your engine running at peak performance. Available at Turner Motorsport, it’s the perfect upgrade or replacement part for your vehicle’s turbo system.

High-performance cooling solution for turbocharged engines
Ensures efficient coolant circulation to prevent overheating
Manufactured from heat-resistant and durable materials
Direct fit for a hassle-free installation
Designed for long-lasting durability and reliability
Compatible with a variety of makes and models

This Turbo Charger Cooling Hose - Return from Turner Motorsport is the ideal choice for any turbocharged engine, ensuring your vehicle operates smoothly and efficiently.

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Water Pump

2X Entries Into Our F80 M3 Sweepstakes

T#:38161720

Part#: 11517632426

Ships in 3 Business Days

Sale - Save 5% $ 782.99

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

$ 743.84 USD

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$ 782.99

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

$ 743.84 USD

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Water Pump

2X Entries Into Our F80 M3 Sweepstakes

T#:46478542

Part#: WPR0046

Ships in 3 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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$ 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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OEM Rein Water Pump W/ Installation Kit - BMW E82/88 E9X N52 3.0L ...

2X Entries Into Our F80 M3 Sweepstakes

T#:45997535

Part#: WPS0502

In Stock at Vendor

Sale - Save 5% $ 811.99

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

$ 770.77 USD

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$ 811.99

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08-31-2026

$ 770.77 USD

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Rein Electric Water Pump Replacement Kits offer a valuable solution to failure-prone cooling-related components on the N52 BMW engine platforms. At the heart of these kits are OEM electric water pumps, which are complemented by Rein's problem solver hoses.

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Rein Coolant Inlet Hose Section - E82, E83, E88, E90, E91, E92, E93 ...

For vehicles with manual transmission

2X Entries Into Our F80 M3 Sweepstakes

T#:388668

Part#: 11537535829

In Stock at Vendor

Sale - Save 5% $ 20.99

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

$ 19.94 USD

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$ 20.99

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$ 19.94 USD

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Replaces the rubber section of the water pump inlet pipe - includes two clamps

BMW Water Pump Kit - E9X/E8X N54/55

2X Entries Into Our F80 M3 Sweepstakes

T#:46616001

Part#: WPS0505

Ships in 3 Business Days

Sale - Save 5% $ 944.99

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

$ 897.68 USD

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$ 944.99

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$ 897.68 USD

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Late-model external water pumps are typically more dependable and easier to service, with no gasket or O-ring to worry about. Replacing higher-mileage units during routine cooling system maintenance is a smart way to add extra peace of mind. Includes: Water pump Thermostat assembly Water pump elbow Coolant hoses Necessary hardware

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