MK4 High Flow Cooling Fan Conversion Kit & Performance Aluminum Radiator Kit
This product was last offered at the strikethrough price on
08-09-2025
Product Details
MK4 HIGH FLOW COOLING FAN UPGRADE
MK4 VW owners know the unreliability of the OEM fans all too well. The factory fan control module is prone to failure, which can lead to overheating that will leave you stranded and potentially damage your engine. The ECS Tuning MK4 High Flow Cooling Fan Kit remedies these issues. Our in-house designed aluminum fan shroud and plug-and-play harness paired with Spall fans improves reliability, and flow and eliminates the ugly plastic OEM fan shroud.
If you are still running your factory cooling fans, what are you doing? By now your cooling fans are worn out, underperforming, and not to mention extremely bulky. Upgrading to the new ECS High Flow cooling system gives you peace of mind and a clean bill of health for your cooling system.
When upgrading to our new fan shroud with fresh, cool flowing fans be sure to check the rest of your cooling system! Our ECS Performance radiator is a direct fit radiator with a 26% increase in cooling capacity and will help ensure the health of your engine.
PART DESIGN
- Aluminum Fan Shroud
- In-house designed and engineered using FARO ARM laser scanning technology for precise fitment
- CNC press brake bent 14GA 5052 aluminum for precise fitment
- Water and weather resistant seal around all edges for a precise seal between the shroud and the radiator and to eliminate vibration
- Heavy duty EPDM foam around the fan mounting flanges for a precise seal between the fans and the shroud
- Plug and Play Wiring Harness
- Direct plug-and-play solution with all connectors, relays, fuses, and switches necessary for install
- Two override rocker switches
- Coolant Temperature Sensor Adapter
- Made of billet 6061 aluminum
- Anodized black finish
KIT CONTENTS
- High Flow Aluminum Fan Shroud and Cooling Fan Installation Kit
- ECS Tuning Aluminum Fan Shroud
- Coolant Temperature Sensor Adapter
- Coolant Temperature Sensor
- All necessary installation hardware
- Cooling Fans
- Spal 861 and 1,328 CFM Cooling Fans With Plug and Play Harness
- Plug and play fan controller wiring hardness
- 1x Spal 12" 861 CFM cooling fan repined for direct fit with wiring harness - Spal reference number - 30100375
- 1x Spal 12" 1,328 CFM cooling fan repined for direct fit with wiring harness - Spal reference number - 30102029
- Spal 861 and 1,328 CFM Cooling Fans With Plug and Play Harness
MK4 PERFORMANCE ALUMINUM RADIATOR
The factory radiator in the VW MK4 Golf/Jetta was engineered to only support stock power outputs and last within a set service life. All too often the MK4 radiators leak out of the end tanks due to corrosion or failed epoxy and suffer from heat soak when more additional power is added. The ECS Tuning in-house engineered Performance Aluminum Radiator solves both issues by utilizing a larger volume, dual row, dual-pass aluminum heat exchanger, hand TIG-welded to 5052 aluminum end tanks and polished to perfection. Featuring a 26% increase in overall volume compared to stock, this is a direct replacement radiator that will outperform and outlast the OE unit!
PART DESIGN
Our radiator utilizes all factory mounts, fan shroud, fan switch and radiator hoses for a direct OE upgrade WITHOUT modifications to any other components
Increase in +26% volume over the stock radiator. ECS Radiator measures 2.125 Liters internal volume compared to the OEM Radiator at 1.560 Liters
Larger volume, dual row, dual-pass aluminum heat exchanger
Pressure tested to 1.5 bar at 0% leak down to ensure quality and leak-proof manufacturing
Fabricated 5052 aluminum end tanks
Fully TIG welded, featuring a polished finish
KIT CONTENTS
Aluminum Radiator
Radiator Fan Shroud mounting screws and washers - QTY 4
A/C Condenser mounting screws and washers - QTY 4
Lower A/C Line mounting screw and washer - QTY 1
Medium Strength, Blue Threadlock
PERFORMANCE FEATURES
+26% increase in cooling system capacity (+0.565 Liters)
100% aluminum construction, TIG welded and pressure checked, for enhanced durability
This Part Fits the Following Vehicles
Make | Model | Submodel | Engine | Special Fitment Notes |
---|---|---|---|---|
Volkswagen | 337/20AE | All | 1.8T | Use vehicle selector to confirm fitment |
Volkswagen | Golf IV | All | 1.8T | Use vehicle selector to confirm fitment |
Volkswagen | Golf IV | All | 2.0 | Use vehicle selector to confirm fitment |
Volkswagen | Golf IV | All | TDI | Use vehicle selector to confirm fitment |
Volkswagen | Golf IV | All | VR6 12v | Use vehicle selector to confirm fitment |
Volkswagen | Golf IV | All | VR6 24v | Use vehicle selector to confirm fitment |
Volkswagen | Jetta IV | All | 1.8T | Use vehicle selector to confirm fitment |
Volkswagen | Jetta IV | All | 2.0 | Use vehicle selector to confirm fitment |
Volkswagen | Jetta IV | All | TDI | Use vehicle selector to confirm fitment |
Volkswagen | Jetta IV | All | VR6 12v | Use vehicle selector to confirm fitment |
Volkswagen | Jetta IV | All | VR6 24v | Use vehicle selector to confirm fitment |
Volkswagen | Jetta IV GLI | All | 1.8T | Use vehicle selector to confirm fitment |
Volkswagen | R32 MKIV | All | 3.2 | Use vehicle selector to confirm fitment |
Kit Contents
Description | Brand | Qty | Lifetime | |
---|---|---|---|---|
Coolant Temperature Sensor |
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1 | YES | |
Alloy Steel Torx Rounded Head Screws, M5 X 0.8 Mm Thread, 10 Mm Long |
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9 | YES | |
Zinc-Plated Steel Oversized Washer For M5 Screw Size, 5.3 Mm ID, 15 Mm OD |
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9 | YES | |
Performance Aluminum Radiator |
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1 | YES | |
Loctite 242 Threadlocker Blue - .02oz single use capsule |
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1 | YES | |
Coolant Temp. Sensor Adapter |
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1 | YES | |
Spal 861 and 1,328 CFM Cooling Fans With Plug and Play Harness |
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1 | YES | |
Aluminum Fan Shroud |
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1 | YES | |
M14 14.2mm ID 17.9mm OD - Aluminum |
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1 | YES | |
Metal Sealing Washer |
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2 | YES | |
Vibration-Damping Loop Clamp |
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2 | YES |

This Product Is 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!
Return and Exchanges
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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
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.
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.
Lifetime Replacement
Want to know more about our Lifetime Replacement program?
Click here to learn more.
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.
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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