CSF 8042 BMW Transmission Oil Cooler E84/E90/E92/E93 DCT & 6-Speed M3 (S65), 335i/335is (N54/N55) Fits E

CSF 8042 Gearbox Oil Heat Exchanger for BMW E84 E90 E92 E93 - DCT and 6-speed

Keep driveline temperatures under control with the CSF 8042 race-bred gearbox oil heat exchanger. Designed for the E9x platform and E84 X1 35i, this direct-fit assembly is a proven upgrade for spirited road use and track days. Expect fast heat rejection, stable fluid temps and dependable performance in M3 S65 V8 and 335i or 335is N54 and N55 applications.

Why enthusiasts choose this upgrade

• Plug-and-play fitment that uses factory quick-connect lines, brackets and shrouding - no cutting or custom fabrication.
• Measured in CSF testing at around 30 percent more effective than the OE unit for temperature control and consistency.
• Race-developed core gives repeatable results on road and circuit with excellent heat soak resistance.
• We run this cooler on our own builds and customer cars - feedback on durability and temp stability has been outstanding.

Race-bred core specification

• 1-row super high-pressure 22 mm wide 11-channel microtube construction using CSF’s AC condenser technology.
• Dual-pass, high-efficiency layout with 11 cooling tubes versus the factory 10-tube design.
• High-density multi-louvered fin pack with approximately 20 percent more fin-to-tube contact area than stock.

Fitment guide

Suits DCT dual-clutch and 6-speed manual applications on the following models:

• BMW E84 X1 xDrive35i - N55 3.0L
• BMW E90 M3 - S65 4.0L
• BMW E90 335i - N54 3.0L
• BMW E90 335i - N55 3.0L
• BMW E90 335xi - N54 3.0L
• BMW E90 335xi - N55 3.0L
• BMW E92 M3 - S65 4.0L
• BMW E92 335i - N54 3.0L
• BMW E92 335i - N55 3.0L
• BMW E92 335is - N54 3.0L
• BMW E92 335xi - N54 3.0L
• BMW E92 335xi - N55 3.0L
• BMW E93 M3 - S65 4.0L
• BMW E93 335i - N54 3.0L
• BMW E93 335i - N55 3.0L
• BMW E93 335is - N54 3.0L

Dimensions

50.8 x 20.32 x 30.48

Part number

CSF 8042

Performance-focused benefits

• E9x gearbox cooler upgrade for track days and fast road driving.
• DCT fluid cooler for M3 S65 and 335i or 335is - helps resist limp mode and heat soak.
• Manual six-speed gear oil cooler solution for improved longevity and consistent shifting.
• OE-style connections and mounting points for a clean, factory-look install.

Installation

Direct-fit with OEM-style lines, brackets and ducting retained. Professional fitting available with MJ Modifications in Warwickshire - request a quote via info@mjmodifications.co.uk.

Compatibility check

We confirm fitment before dispatch. Add your UK registration or the last 7 of your VIN at checkout to ensure you receive the correct cooler for your E84, E90, E92 or E93.

Manufacturer and warranty

Manufactured by CSF Radiators. Supplied with a 2-year CSF Radiators warranty.

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