CSF B-Tube Aluminium Performance Radiator for BMW 1/2/3/4 Series (F20 F21 F22 F23 F30 F31 F34 GT F32 F33 F36 Gran Coupe) & i3 - Automatic Transmission - Direct-Fit Drop-In Upgrade

CSF Alloy Uprated Radiator - BMW F-Series Auto Models and i3

Beat heat soak, keep coolant temps stable and protect your tuned engine with CSF’s high efficiency alloy cooling radiator. This premium heat exchanger is a bolt-on, plug-and-play upgrade that uses the factory mounts and shrouds, engineered specifically for F-chassis BMWs with automatic gearboxes and also listed for the BMW i3. Ideal for fast road, daily driving, track days and long summer runs where reliable temperature control matters.

Proven cooling performance

• All-alloy construction for strength and longevity with expertly hand TIG-welded end tanks
• B-tube multi-channel core for greater surface area and excellent heat rejection under sustained load
• High efficiency fin design for improved airflow and rapid heat transfer
• OEM-location fitment that accepts standard hoses, fan cowling and mounts for an easy install
• Validated for pressure and thermal cycling to meet demanding real-world use
• Polished finish that looks smart in the engine bay
• Built for auto transmission applications with the correct connections retained

Who is it for

If you run a remap, hybrid turbo, spirited B-road setup or see regular circuit time, this CSF radiator provides the extra cooling headroom your BMW needs. Expect fast recovery between pulls, consistent temperatures in traffic and rock-solid reliability when ambient temps rise.

Compatibility

Designed for F-series automatic gearbox models across the BMW range plus i3. Typical applications include:

• 1 Series - F20, F21
• 2 Series - F22, F23
• 3 Series - F30, F31, F34 GT
• 4 Series - F32, F33, F36 GC
• BMW i3

If you are unsure about fitment for your exact vehicle, contact us and we will confirm before you order.

Why buy from us

We run CSF cooling hardware on our own builds and customer cars and it just works. Feedback is consistent - lower peak temps, quicker cooldowns and a quality finish that lasts.

Fitting service

Installation available at MJ Modifications in Warwickshire. We offer professional fitting, coolant and bleeding, and health checks. Request a quote: info@mjmodifications.co.uk.

Order with confidence

Choose CSF for a motorsport-proven alloy radiator that enhances reliability without compromise. A smart upgrade for any F-series BMW or i3 that sees enthusiastic driving, towing, long commutes or hot-weather use.

Search terms customers use

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