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Performance Water Pump & Thermostat Kit

Includes ECS N54 400W water pump conversion, 74*C thermostat, installation hardware and coolant!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Assembled By ECS
Mfg Part #
044952LA05KT
ECS Part #
ES#5425480
Brand
Assembled By ECS

SALE: 489.59 (18% OFF)
WAS: $599.99 on 05-02-2026

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


Free Shipping Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement
This product is backed by our
Lifetime Replacement Program! Read more here
Availability:
On Order
Est. Ship Date:
on Aug 11, 2026
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Product Details

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

While the N52’s factory 200W electronic water pump is adequate for daily driving, it quickly reaches its limits under hard use, high temperatures, or on modified engines. Our high-flow upgrade allows a 400W N54 water pump to bolt in without modification, instantly doubling coolant flow and dramatically improving heat extraction from the engine. The result is more stable operating temperatures, increased thermal headroom, and greater reliability during spirited driving, track use, or demanding conditions.

Additionally, the factory thermostat doesn’t begin opening until 97 °C, allowing engine temperatures to climb higher than ideal before coolant flow increases. The included Mishimoto Racing thermostat lowers the activation temperature to 74 °C—an impressive 23 °C reduction. The result is faster thermostat response, lower operating temperatures, and added protection against heat-related issues, especially during spirited driving or warm conditions.

Kit includes:

  • ECS N52 High-Flow Water Pump Upgrade
  • Mishimoto Racing thermostat 
  • Genuine BMW coolant
  • Mounting hardware required for both the thermostat and water pump

This Part Fits the Following Vehicles

Make Model Submodel Engine Special Fitment Notes
BMW E60 525i N52 3.0L Use vehicle selector to confirm fitment
BMW E60 525xi N52 3.0L Use vehicle selector to confirm fitment
BMW E60 528i N52 3.0L Use vehicle selector to confirm fitment
BMW E60 528xi N52 3.0L Use vehicle selector to confirm fitment
BMW E60 530i N52 3.0L Use vehicle selector to confirm fitment
BMW E60 530xi N52 3.0L Use vehicle selector to confirm fitment
BMW E61 530xi N52 3.0L Use vehicle selector to confirm fitment
BMW E70 X5 N52 3.0L Use vehicle selector to confirm fitment
BMW E70 X5 xDrive30i N52 3.0L Use vehicle selector to confirm fitment
BMW E82 128i N52 3.0L Use vehicle selector to confirm fitment
BMW E83 X3 N52 3.0L Use vehicle selector to confirm fitment
BMW E88 128i N52 3.0L Use vehicle selector to confirm fitment
BMW E90 325i N52 3.0L Use vehicle selector to confirm fitment
BMW E90 325xi N52 3.0L Use vehicle selector to confirm fitment
BMW E90 328i N52 3.0L Use vehicle selector to confirm fitment
BMW E90 328xi N52 3.0L Use vehicle selector to confirm fitment
BMW E90 330i N52 3.0L Use vehicle selector to confirm fitment
BMW E90 330xi N52 3.0L Use vehicle selector to confirm fitment
BMW E91 325xi N52 3.0L Use vehicle selector to confirm fitment
BMW E91 328i N52 3.0L Use vehicle selector to confirm fitment
BMW E91 328xi N52 3.0L Use vehicle selector to confirm fitment
BMW E92 328i N52 3.0L Use vehicle selector to confirm fitment
BMW E92 328xi N52 3.0L Use vehicle selector to confirm fitment
BMW E93 328i N52 3.0L Use vehicle selector to confirm fitment
BMW Z4 3.0i N52 3.0L Use vehicle selector to confirm fitment
BMW Z4 3.0Si N52 3.0L Use vehicle selector to confirm fitment
BMW Z4 sDrive30i N52 3.0L Use vehicle selector to confirm fitment
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.

Kit Contents

Description Brand Qty Lifetime
Hex Bolt With Washer - Priced Each Genuine BMW - Corporate Logo 2 YES
BMW Coolant / Antifreeze - 1 Gallon - Blue G48 Genuine BMW - Corporate Logo 1 NO
Racing Thermostat Mishimoto - Corporate Logo 1 YES
Water Pump Bavarian Autosport - Corporate Logo 1 YES
Zinc-Plated Alloy Steel Screw - Hex Head M8X1.25X20mm Bremmen Parts - Corporate Logo 3 YES
N54 Water Pump Adaptor Brackets ECS - Corporate Logo 1 YES
N54 Water Pump Adapter Harness ECS - Corporate Logo 1 YES

Some kit components are covered by our Lifetime Replacement Program

Products protected by our Lifetime Replacement Program are covered for as long as you own the product, no need to worry about an expiration date. Purchase your products and enjoy some worry-free motoring, knowing we've got you covered.

If you have any questions, would like to learn more or are ready to place a replacement claim, click here!

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Return and Exchanges

Need to set up a return? Click here to begin: Return Process

All you need is your order number and email address.


New/Unused Product Returns

ECS Tuning will accept returns for unused products within 90 days of the ship date for a refund to the original payment method used. The customer is responsible for the return shipping costs and fees. If selecting to use a prepaid shipping label, the shipping cost will be deducted from the total refunded amount. All new/unused products must be new, unused and must be in the original packaging, including labeling, manuals, hardware, etc. Special order parts are non-refundable.

In the event that we find an error on our website or on behalf of an ECS Tuning Representative, we will provide a return shipping label from the original delivery location.

Refused Packages

Any domestic orders that are returned to ECS Tuning as refused by receiver or non-deliverable will be subject to a return handling fee and will be processed as a return in compliance with our standard return policy, including a 15% restocking fee.

Any international orders that are refused at the time of delivery will be subject to carrier abandonment of the package, at which time the ordered products would be discarded by the carrier. The customer will not be refunded for the value of the order and the discarded products are no longer retrievable.

Return Process

Return Process

ECS Tuning now offers an online returns solution! To get started, simply log into your ECS Tuning account, Click the "View Orders" button on the My Account home page and select the order that you wish to make a return on to begin. If you have any questions, feel free to reach out to our Customer Service Team for assistance!

Please note: Refunds will be processed to the original payment method used on the order or to an in store credit, respective to the type of return that is made as well as any pre-existing arrangements with an ECS Tuning Customer Service Representative. In the event that multiple forms of payment were used, we will refund the value to an in store credit. In the event that a return label is provided, these charges may be deducted from the total refund you receive.

Original shipping costs are non-refundable and the buyer is responsible for return shipping charges. ECS Tuning will not accept COD deliveries.


All in store credit balances will expire after one year from the original purchase date.

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Shipping Policy

Free Shipping On Orders $49 & Up

Items marked with a 'Free Shipping On Orders $49 and Up' logo may qualify for free standard economy ground shipping to the contiguous United States (48 states) for most orders with a value greater or equal to $49.00 USD. Oversized products and direct ship products are excluded from this offer unless otherwise noted.

Free Shipping

Items marked as 'Free Shipping' may qualify for free standard economy ground shipping to the contiguous United States (48 states). Oversized products and direct ship products are excluded from this offer unless otherwise noted.


The policies listed above are subject to change at any time without notice.

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Lifetime Replacement

Want to know more about our Lifetime Replacement program?

Click here to learn more.

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Why You Should Shop From ECS Tuning

ECS Tuning stands out as more than an automotive parts supplier-it's a vibrant community fueled by a shared passion for cars. Born from the enthusiasm of car lovers, we offer an unmatched understanding and commitment to the automotive world, providing high-quality parts and accessories sourced from our own experiences. Our selection is meticulously crafted to meet the highest standards of performance, quality, and design, catering to both the latest trends and classic styles.


Our distinct advantage lies in our passionate team and comprehensive support, offering expert advice and seamless service from selection to installation. Shopping with ECS brings exclusive perks, including our Lifetime Replacement Guarantee and free shipping on orders over $49, enhancing the value of every purchase. As a central hub for car enthusiasts, ECS Tuning fosters a rich community where ideas and experiences flourish, transforming us from a mere supplier into a platform where automotive dreams come to life.

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Cancellation Policy

At ECS Tuning, we understand that plans can change. That's why we offer a flexible cancellation policy for our customers. You may cancel your order at any time before you receive the shipment confirmation. This policy is designed to provide you with peace of mind and the flexibility to make adjustments to your purchases as needed. Should you decide to cancel your order, simply reach out to our customer service team, and we will assist you with the process swiftly and efficiently.

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ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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