CSF 7078 BMW N55 Uprated Alloy Radiator - All-Aluminium Performance/Heavy-Duty Replacement | Direct-Fit Drop-In Cooling Upgrade for M2 F87, M235i F22, 335i F30, 435i F32/F36 | 42mm Dual-Row B-Tube Core | OEM 17118672103

CSF 7078 Alloy Radiator for BMW N55 Engines

Looking for unbeatable cooling on your N55-powered BMW without chopping or custom fab work? The CSF 7078 is a bolt-in, high-capacity aluminium heat exchanger built for hard road miles and track days. It keeps coolant temps in check on tuned cars and spirited drives, delivers rock-solid reliability, and reuses the factory-style hose connections for a clean OE-style install. We fit these on customer cars and our own builds at MJ Modifications, and feedback on temperature stability and fit has been consistently excellent.

Key benefits

• Dual-row 42 mm B-tube core for superior heat rejection compared with the stock unit
• High-efficiency multi-louvred fins with 6.5 mm fin height to maximise surface area and airflow
• Precision CNC-machined quick-connect inlet and outlet plus all auxiliary ports for OEM-style connections
• Robust CNC-machined brackets and fittings for durability and factory alignment
• All-aluminium construction with race-style drain plug
• Hand-polished mirror finish, approx. 1 hour polish from CSF
• OEM-fit installation that accepts the original condenser, fan shroud, mounting points and quick-connect hoses
• Direct replacement for OE reference 17118672103

What you will notice

• Lower and more consistent coolant temperatures during fast road use and track sessions
• Improved thermal headroom for remapped or lightly modified N55 setups
• Factory-quality fit with no cutting or wiring changes
• Stronger, all-metal build that outlasts plastic end-tank radiators

Vehicle applications

• 2014–2018 M2 F87 N55
• 2012–2016 M235i and M235i xDrive F22
• 2012–2016 M235i Racing F22
• 2011–2015 335i and 335i xDrive F30
• 2012–2016 435i and 435i xDrive F32
• 2013–2016 435i and 435i xDrive Gran Coupe F36

Part numbers

• CSF part number: 7078
• OE cross-reference: 17118672103

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. For a fitting quote, email info@mjmodifications.co.uk. The CSF 7078 slots into the factory location and retains the OEM-style quick connects, condenser, shrouds and mounts.

Compatibility check before dispatch

To ensure the correct cooler is supplied, add your UK registration or last 7 of your VIN at checkout and our team will verify compatibility before shipping.

Warranty

2-year CSF Radiators warranty.

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Choose the CSF 7078 if you want an all-aluminium, high-efficiency cooler that installs like stock and performs when it matters. Order today or book fitting with MJ Modifications for a hassle-free upgrade.