Description
The CSF High-Performance Engine Oil Cooler is engineered for BMW B58-powered platforms including BMW G2X M340i, BMW G2X M440i, and BMW G42 M240i. Built on CSF’s proven motorsport cooling technology, this unit is designed to maintain stable oil temperatures under extreme street and track conditions, preventing heat soak and limp mode during high-performance driving.
CSF continues to lead the BMW cooling segment by delivering factory-like fitment with significantly improved cooling efficiency. This oil cooler is part of CSF’s advanced B58 cooling lineup, developed for vehicles increasingly used in motorsport and high-horsepower applications.
Engineering & Design Features
- 1-row super-high pressure 32mm 10-channel microtube core
- Increased core thickness from 28mm to 32mm for improved cooling capacity
- AC condenser-inspired design for maximum surface area efficiency
- 8mm tall multi-louvered fin construction for optimized airflow
- Superior oil flow characteristics for high-performance applications
- Rock guard protection to reduce damage from road debris
- OEM-style inlet and outlet connections for seamless integration
- Uses factory mounting locations and ducting with no modification required
- Robot-welded construction for increased durability
Performance Advantages
The CSF oil cooler increases core volume by approximately 14% compared to the OEM unit, delivering improved heat rejection and more stable oil temperatures under load. This helps prevent oil overheating, reduces the risk of engine limp mode, and maintains consistent performance during aggressive driving, track sessions, or high-output builds exceeding 1000 horsepower.
CSF vs OEM Comparison
- Core Thickness: 32mm (CSF) vs 28mm (OEM)
- Core Design: Super-High Pressure Microtube (CSF) vs Tube & Fin (OEM)
- Construction: Robot Welded (CSF) vs Brazed (OEM)
- Performance: Increased cooling efficiency and durability over factory unit
Installation Benefits
- Drop-in installation with OEM fitment geometry
- Reuses factory shrouds and ducting
- OEM-style rubber seals for optimal airflow
- Includes hardware for bash guard reinstallation (M6 rivet nuts and bolts)
- No major modifications required
Fitment Information
This oil cooler is designed exclusively for B58D-equipped BMW models with the Motorsport Engineering Package (S33TA).
- BMW G42 M240i (2022–2026) including xDrive
- BMW G2X M340i (2020–2024) including xDrive
- BMW G2X M440i (2021–2024) including xDrive
Important Fitment Note
- Fits only B58D engine variants
- Requires Motorsport Engineering Package (S33TA)
- Not compatible with B58N-equipped models
- VIN verification is recommended prior to purchase
OEM Reference
- BMW OEM Part Number: 17-21-8-666-121
Warranty
- 2-Year Limited Warranty
Application Use
- Road racing
- Drag racing
- High-performance street driving
- Vehicles with increased horsepower and thermal load
