CSF 8372 Performance Engine Oil Cooler for 2020-2026 M240i/M340i/M440i S33TA

Vehicle Fitment

• 2022-2026 BMW M240i (G42, incl. xDrive) - with S33TA Motorsport Engineering Package
• 2020-2024 BMW M340i (G20/G21, incl. xDrive) - with S33TA Motorsport Engineering Package
• 2021-2024 BMW M440i (G22/G23/G26, incl. xDrive) - with S33TA Motorsport Engineering Package

Fitment Notes

• Only fits G2X/G42 models equipped with the B58D engine (S33TA Motorsport Engineering Package); does not fit vehicles with the standard B58N engine - verify via VIN before ordering
• Installation requires drilling out two factory rivet nuts to remove the oil cooler bash guards; new M6 rivet nuts and bolts are included for reinstallation

Features

• Built with CSF's AC Condenser-derived technology - 1-row, super-high-pressure 32mm, 10-channel microtube core
• Core volume increased by approximately 14% over the factory unit (28mm to 32mm core thickness)
• 8mm tall, multi-louvered fins for improved airflow and heat rejection
• Utilizes OEM top/bottom rubber seals for optimal airflow direction
• OEM-style inlet/outlet connections for a clean, factory-style install
• True drop-in fit - installs in the factory location using OEM hardware
• Includes new M6 rivet nuts and bolts for bash guard reinstallation
• Helps reduce heat soak and stabilize oil temperatures under sustained high-load driving
• Ideal for road racing, drag racing, and high-horsepower or boosted applications

Specifications

• Core: 1-row, 32mm thickness, 10-channel microtube
• Core volume increase: approx. 14% over OEM (28mm to 32mm)
• Fin height: 8mm, multi-louvered
• Connections: OEM-style inlet/outlet
• Position: Front-mounted, factory oil cooler location
• OEM cross reference: BMW 17-21-8-666-121
• Warranty: 2-year limited

Included Components

• 1x High-Performance Engine Oil Cooler
• M6 Rivet Nuts & Bolts (for bash guard reinstallation)

Product Description

The CSF 8372 is a high-performance engine oil cooler built specifically for BMW's B58D-powered G42 M240i, G20/G21 M340i, and G22/G23/G26 M440i - models equipped with the S33TA Motorsport Engineering Package. Using CSF's AC condenser-derived microtube core technology, it increases core volume by roughly 14% over the factory unit, giving the oil system meaningfully more thermal capacity without changing the car's factory footprint.

It installs as a true drop-in replacement in the factory location using OEM hardware, with OEM-style seals and inlet/outlet connections for a clean fit, and CSF includes fresh M6 rivet nuts and bolts to resecure the bash guards after installation. It's a solid upgrade for owners pushing spirited street driving, track days, or higher boost levels who want more stable oil temperatures and less risk of heat soak - just be sure to confirm your car has the B58D engine before ordering, since it won't fit the standard B58N-equipped cars.