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CSF BMW F9X X3M/X4M High-Performance Heat Exchanger and Transmission Cooler Module

$1195.00

On Backorder — Expected to ship by Aug 16, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2020-2025 BMW X4. CSF's combined Heat Exchanger and Transmission Cooler module offers 201% more core volume for improved cooling.

Key Features

  • Fits 2020-2025 BMW X3M and X4M.
  • This cooling module combines a high-performance heat exchanger and transmission cooler into a single unit.
  • Features a 201% increase in core volume over the OEM design for significantly improved heat dissipation.
  • The heat exchanger utilizes a 2-row, 42mm ultra-high-performance core with exclusive B-Tube technology and multi-louvered fins.
  • The transmission cooler uses a 1-row, 16mm 9-channel microtube design for optimal oil flow and maximum surface area contact.
  • Constructed from 100% all-aluminum with TIG-welded tanks for superior strength and durability.
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Will it fit your car?
Fits these vehicles
  • BMW X3 2020-2024
  • BMW X4 2020-2025
About this part

Product Details

When you're looking to keep your 2020-2025 BMW X4 X3M or X4M running at its best, especially under demanding conditions, CSF offers a combined Heat Exchanger and Transmission Cooler module. This unit replaces both your stock heat exchanger and transmission cooler with a single, high-performance component designed to handle more heat and keep your fluids at optimal temperatures. It's built to address the cooling needs that arise from performance driving, whether on the street or the track.

CSF engineered this module by leveraging their experience with other BMW cooling systems. They recognized that the space constraints in the F9X chassis required a clever solution, so they combined the two coolers into one unit. This allows for a much larger dual-core design, increasing the overall core volume by 201% compared to the factory setup. The heat exchanger uses a 2-row, 42mm core with CSF's B-Tube technology and multi-louvered fins to maximize airflow and heat dissipation. The transmission cooler also benefits from a dual-core design, utilizing a 16mm microtube construction for optimal oil flow and surface area contact. This all-aluminum, TIG-welded construction is significantly stronger than the stock plastic components, and it includes an integrated, bolt-on metal rock guard to protect the vulnerable front-mounted cooler from road debris.

This cooling module is designed as a true plug-and-play installation, meaning it fits directly into the OEM position without requiring any modifications to your vehicle. The CNC machined mounting brackets and OEM-style quick-connect fittings ensure a straightforward installation process. By combining these two essential cooling components into one robust module, CSF not only enhances cooling performance but also helps to manage costs, passing those savings along to you.

Specifications

Brand
CSF
Manufacturer Part #
8331
UPC
710353083314

Frequently Asked Questions

CSF BMW F9X X3M/X4M High-Performance Heat Exchanger and Transmission Cooler Module

$1195.00