TunePoint Europe » Airtec Motorsport » AIRTEC Motorsport Auxiliary Radiator for BMW Models (B58/B46/N55 M2)
AIRTEC Motorsport

AIRTEC Motorsport Auxiliary Radiator for BMW Models (B58/B46/N55 M2)

SKU: TP-AT-Radiator-B58/B46/N55
(7)
In stock
On backorder
€489,00 EUR inc. VAT

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Upgrade the cooling performance of your BMW with the AIRTEC Motorsport Auxiliary Radiator — engineered for tuned and high-performance B58, B46 and N55 applications.
Designed as a direct replacement for the factory auxiliary radiator, this upgrade increases cooling capacity and frontal surface area to help maintain lower coolant temperatures during aggressive driving, spirited street use or track sessions.


The AIRTEC radiator features a larger and thicker core compared to OEM, while still fitting neatly behind the front bumper using factory mounting points and original coolant connections — no cutting or trimming required.
Finished in durable black powder coating, this kit delivers improved cooling efficiency while maintaining OEM-style fitment and clean installation.


Features:
* 56% increase in cooling capacity over OEM
* Larger frontal surface area for improved airflow
* Improved cooling efficiency for tuned applications
* Direct bolt-on replacement
* No cutting or trimming required
* Durable black powder-coated finish
* OEM-style fitment
* Installation guide included
Fitment:

1-Series: 
M140i – F20 (B58)
M140i – F21 (B58)
M140iX – F20 (B58)
M140iX – F21 (B58)

2-Series: 
M240i – F22 (B58)
M240iX – F22  (B58)
230i – F22 – (B46)
230iX – F22 – (B46)
M240i – F22 – (B58)
M240iX – F22 – (B58)
M2 – F87 – (N55)

3-Series: 
340i – F30 (B58)
340iX – F30 (B58)
340i – F34 GT (B58)
340iX – F34 GT (B58)

4-Series: 
430i – F32 (B46)
430iX – F32 (B46)
440i – F32 (B58)
440iX – F32 (B58)
430i – F32 (B46)
430iX – F32 (B46)
440i – F32 (B58)
440iX – F32 (B58)
430i – F36 Gran Coupé (B46)
430iX – F36 Gran Coupé (B46)
440i – F36 Gran Coupé (B58)

 

Available on request.
Estimated EU delivery: 7–14 business days.

This product is intended for off-road, racing and motorsport use only.
Professional installation and tuning recommended.
Buyer is responsible for checking local laws and vehicle compatibility before installation.

 

 

AIRTEC Auxiliary Radiator for BMW: Improved Cooling for Demanding Driving

BMW performance engines are known for delivering impressive power, but increased performance also creates additional heat. Whether you're enjoying spirited road driving or occasional track sessions, maintaining stable temperatures is essential for reliability and consistent performance. This is where an auxiliary radiator upgrade can provide real benefits.

Built for Modern BMW Performance Platforms

AIRTEC Motorsport developed this cooling solution for selected BMW models equipped with B58, B46, and N55 engines. The larger core design increases coolant capacity and improves heat dissipation compared to the factory unit.

Drivers looking for an N55 radiator upgrade often seek better cooling without major modifications. AIRTEC's direct-fit design makes installation straightforward while delivering noticeable cooling improvements.

Why Cooling Matters

Excessive heat can affect engine efficiency and reduce performance during demanding driving conditions. A quality AiRTEC radiator helps maintain more stable operating temperatures, particularly when the vehicle is tuned or frequently driven hard.

For owners of turbocharged six-cylinder models, a B58 radiator upgrade can be a valuable addition to an overall performance build.

Choosing the Right BMW Radiator

When selecting a radiator for bmw applications, cooling efficiency and fitment should be top priorities. Increased coolant volume and a larger cooling surface area can help reduce temperature spikes and improve long-term durability.

A premium BMW radiator upgrade is often a smart investment for enthusiasts who want dependable performance throughout the year.

Performance and Reliability Benefits

Many owners searching for a replacement radiator BMW component are looking for more than a standard OEM substitute. Enhanced cooling can support engine longevity and provide greater confidence during aggressive driving.

Among the many bmw radiators available today, performance-focused options offer advantages that extend beyond simple replacement.

Is It Worth the Investment?

Factors such as BMW radiator cost and vehicle usage should be considered before upgrading. While performance cooling components typically cost more than standard replacements, they can deliver significant benefits for modified or heavily used vehicles.

A properly designed BMW car radiator upgrade helps manage heat more effectively and contributes to overall reliability.

Final Thoughts

If you're comparing BMW radiators for sale, it's important to consider cooling capacity, build quality, and ease of installation. While some buyers also research options like a BMW radiator, BMW performance models often require solutions specifically engineered for higher thermal demands.

When evaluating BMW radiator price, remember that long-term reliability and consistent performance are just as important as the initial purchase cost. For enthusiasts seeking a high-quality BMW radiator for sale, the AIRTEC Auxiliary Radiator offers a practical and effective cooling upgrade.

FAQ

What is an auxiliary radiator and what does it do?
An auxiliary radiator works alongside the main radiator to increase coolant capacity and cooling efficiency. On tuned or track-driven BMWs it prevents heat soak and coolant temperature spikes that the factory cooling system cannot manage under sustained load.
Which BMW models is this auxiliary radiator compatible with?
This radiator fits a wide range of BMW models including the M140i, M240i, 340i, 440i, 230i, 430i, and the M2 F87, covering B58, B46, and N55 engine variants across the 1, 2, 3, and 4 Series platforms.
How much does the AIRTEC auxiliary radiator increase cooling capacity?
The AIRTEC unit increases coolant capacity by 56% over the standard radiator. The frontal area is also enlarged to help dissipate the extra heat load more effectively, making a meaningful difference on tuned or track-driven builds.
Does fitting this radiator require modifying the bumper?
No modifications are required. The radiator fits behind the factory bumper using the OEM mounts and original coolant connectors, making it a true direct replacement with no cutting, drilling, or additional brackets needed.
Is this radiator suitable for track use?
Yes, this radiator is specifically developed for fast road and track use, where high sustained engine loads push coolant temperatures beyond what the stock system can handle. It is one of the most practical thermal upgrades for tuned B58, B46, and N55 builds.
What are the dimensions compared to the OEM radiator?
The OEM radiator measures 195×180×27mm with a volume of 0.95 litres. The AIRTEC unit measures 200×185×40mm, increasing volume to 1.48 litres and frontal area from 351cm² to 370cm² for noticeably better cooling performance.

Customer Reviews

7 reviews

Sacha V.

Coolant temps on my M140i used to creep up on longer spirited drives. Since fitting the AIRTEC auxiliary rad that's completely gone. Fitment was straightforward and the build quality is exactly what you expect from them.

Kacper U.

Night and day difference in thermal management after fitting this. Temps stay flat even on back-to-back hard pulls. AIRTEC clearly know what they're doing with this application.

Joachim U.

Fitted to my F87 M2 and the N55 runs noticeably cooler under pressure now. Quality is excellent and it drops in cleanly without any modification needed. Exactly what the car needed.

Damian U.

Running a tuned B58 and heat soak was becoming a real issue. This sorted it completely. Coolant temps are stable where they never were before and the install was cleaner than expected.

Daniel B.

Really well engineered product. The improvement in cooling performance is immediately measurable and the finish quality is top tier. Worth every penny on any modified B58 application.

Lukas S.

Had this on my 440i F32 for three months now. Temps hold steady on track days where the OEM setup used to struggle badly. AIRTEC auxiliary rad is a must for anyone pushing these engines hard.

Stefan J.

Solid upgrade that makes a genuine difference. Build quality is premium, fitment is clean and the thermal improvement speaks for itself. One of the best cooling upgrades available for these platforms.