The BMW F97 X3M & F98 X4M pack the S58 twin-turbo engine, delivering massive power and speed. But like their G8X M3/M4/M2 siblings, they struggle with heat soak and cooling inefficiencies, especially under high-boost tuning or aggressive driving.
CSF, the leader in S58 cooling, has been the go-to brand for top-performing X3Ms and X4Ms. Now, after extensive testing, CSF introduces the Front Mount Heat Exchanger & Transmission Cooler Module a game-changing upgrade engineered to eliminate cooling bottlenecks and unleash your SUV full potential.
Fitment Information
- BMW X3 M / Competition (F97) (2020, 2021, 2022, 2023, 2024)
- BMW X4 M / Competition (F98) (2020, 2021, 2022, 2023, 2024, 2025)
- BMW X3 M40i (G01 LCI & Late Pre-LCI) (2020-2024) - See Fitment Note
- BMW X4 M40i (G02 LCI & Late Pre-LCI) (2020-2025) - See Fitment Note
Fitment Note: Part #CSF8331 is a 2-in-1 cooling module that replaces both the factory Heat Exchanger (OE #17119468695) and the Transmission Cooler (OE #17118693360).
For M40i models, this fits LCI versions and Pre-LCI models built after 08/2019 equipped with the B58D engine; please verify your build date. This is a "drop-in fit" requiring no modifications to the factory mounting points or cooling lines, utilizing OEM-style "Quick Connect" inlets and outlets.
Emissions Compliance
This item does not yet have a CARB exemption and does not ship to California or any CARB state.
Specs & Features
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Performance Benefits
- Lowers Intake Air Temperatures (IATs): Prevents heat soak, ensuring consistent power and faster recovery.
- Enhances Airflow & Cooling Efficiency: Improves engine coolant temperatures for better overall performance.
- Direct OEM Replacement: True plug-and-play fitment, no modifications required.
- 2-Year Limited Warranty: Guaranteed CSF quality and durability.
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Heat Exchanger
- 42mm 2-Row Core: Maximizes heat dissipation for superior cooling.
- CSF B-Tube Technology: Optimized airflow with multi-louvered fins for enhanced efficiency.
- Rock Guard Protection: shields against road debris and impacts.
- Hand-Brushed Satin Finish: Corrosion-resistant with a sleek OEM+ look.
- 42mm 2-Row Core: Maximizes heat dissipation for superior cooling.
-
Transmission Cooler
- 201% Larger Dual-Core Design: Boosts cooling capacity for peak transmission performance.
- 16mm 9-Channel Microtube: Optimized oil flow with maximum surface area contact.
- Pre-Installed Foam Strips: Better sealing for improved efficiency.
- CNC-Machined Mounting Brackets: OEM-style fit with quick-connect inlets/outlets.
- 100% TIG-Welded Aluminum: Stronger, leak-proof, and built to last.
- 201% Larger Dual-Core Design: Boosts cooling capacity for peak transmission performance.
Product Description
The BMW F97 X3M and F98 X4M pack S58 twin-turbo power, but heat soak, rising IATs, and weak transmission cooling rob performance and reliability especially under spirited driving or high-boost tuning. CSF, the leader in S58 cooling, delivers the Front Mount Heat Exchanger & Transmission Cooler Module, a plug-and-play upgrade designed to eliminate overheating and maximize efficiency.
This 2-in-1 cooling solution combines a 42mm 2-row ultra-high-performance core with CSF exclusive B-Tube technology for enhanced heat dissipation, lower IATs, and improved airflow. The dual-core transmission cooler features a 201% increase in core volume with a 16mm 9-channel microtube design, optimizing oil flow and thermal efficiency. Built from 100% TIG-welded aluminum for maximum durability, it includes an integrated rock guard for added protection. Whether you're tracking your SUV, running a high-horsepower build, or daily driving in extreme conditions, this plug-and-play cooling module ensures your X3M/X4M stays cool, powerful, and reliable. With over 75 years of expertise, CSF is the trusted choice for tuners, racers, and performance enthusiasts. Upgrade now and keep your BMW running at its peak!
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