CSF BMW G2X M340i/M440i & G42 M240i High-Performance Engine Oil Cooler

Looking for a BMW oil cooler upgrade for your M340i, M440i, or M240i? The CSF High-Performance Engine Oil Cooler is engineered to improve cooling efficiency and assist in keeping oil temperatures within safe levels during spirited driving, track days and high-performance use. No matter if you’re upgrading a BMW M340i oil cooler, BMW M440i oil cooler or BMW M240i oil cooler, this direct-fit solution provides enhanced cooling performance while retaining OEM-style fitment. Built with CSF's latest cooling technology, this oil cooler is well-suited to BMW owners who want better temperature control in tuned or hard-driven vehicles. Why Upgrade Your BMW Oil Cooler? Helps manage oil temperatures during demanding driving conditions Ideal for tuned and performance-oriented BMW applications Direct-fit installation with OEM-style connections Suitable for road, track, and drag racing use Backed by a 2-year limited warranty Features 8mm Tall Multi-Louvered Fin Made with CSF’s AC Condenser Technology Using a 1-Row Super-High Pressure 32mm 10-Channel Microtube for Optimal Oil Flow and Maximum Surface Area Contact Utilizes OEM Top/Bottom Rubber Seals for Optimal Airflow OEM Style Inlet/Outlet Connections Drop-in Fit Install 2-Year Limited Warranty Ideal for Road Racing, Drag Racing, and Vehicles With Increased Performance Applications: 2022-2026 BMW G42 M240i (incl. xDrive) with the Motorsport Engineering Package (S33TA) 2020-2024 BMW G2X M340i (incl. xDrive) with the Motorsport Engineering Package (S33TA) 2021-2024 BMW G2X M440i (incl. xDrive) with the Motorsport Engineering Package (S33TA) OEM Part Number: BMW: 17-21-8-666-121 Fitment Note: Only Fits G2X Models with the BMW B58D Motor. If your M340i or M440i has the B58N Motor, the Engine Oil Cooler was not available. Please check your VIN to be sure you have the S33TA Motorsport Engineering Package and B58D motor. You will need to drill out the two rivet nuts to remove the two oil cooler bash guards. CSF supplies new threaded M6 rivet nuts and m6 bolts to secure the bash guards upon installation of the CSF oil cooler FAQs What are the benefits of upgrading to a CSF BMW oil cooler? Key benefits include improved cooling efficiency, better heat management under load, OEM-style fitment, and suitability for road, track, and drag racing applications. Is this a good BMW oil cooler upgrade for a modified M340i, M440i, or M240i? Yes. This CSF oil cooler is a popular upgrade for BMW owners seeking to improve cooling overall performance, specifically on tuned or performance-focused vehicles wherein oil temperatures can boom underneath load Should I buy a BMW oil cooler before track days or performance driving events? Many enthusiasts choose to buy a BMW oil cooler upgrade before track use to help maintain stable oil temperatures during extended periods of hard driving and repeated acceleration.