Genuine BMW F-Series Auxiliary/Additional Radiator F20 F21 F22 F23 F30 F31 F34 F32 F33 F36 (1/2/3/4 Series) - M140i M240i 335i 340i 440i - OEM Part 17117628057

OEM BMW F-Series Secondary Radiator, factory side cooler for 1 Series, 2 Series, 3 Series, 4 Series, Part No. 17117628057

Boost your F-Series cooling system with this genuine BMW side-mounted radiator. It is a direct-fit, plug-and-play coolant heat exchanger that adds extra thermal capacity for fast road, track days and warm weather driving. Perfect for M140i, M240i, 335i, 340i and 440i owners, as well as selected petrol and xDrive variants across F20, F21, F22, F23, F30, F31, F34, F32, F33 and F36.

As an original equipment BMW part, it integrates with factory pipework and brackets for a clean, stock-style installation and long-term reliability. We have fitted this unit on our own builds and for customer cars at MJ Modifications and feedback has been fantastic, with noticeably steadier coolant temperatures on spirited drives and during extended sessions. If you are chasing consistency and want OEM quality, this is the secondary radiator to choose.

Why this genuine BMW side radiator stands out

• Original BMW component for perfect fit and finish, Part number 17117628057
• Extra cooling capacity for B58 and N55 powered models, ideal for tuned or remapped cars, Stage 1 and Stage 2
• Helps reduce heat soak, stabilises coolant temps and supports consistent performance
• Direct-fit replacement using factory mounting points, hoses and connections
• Suitable for daily use, fast road, track days and high ambient temperatures

You may need the genuine BMW mounting frame or shroud for your specific model. Ask us if you are unsure and we will advise the correct ancillary parts.

Vehicle fitment

Fits the BMW F-Series platforms listed below. If you are searching for terms like BMW F-Series side radiator, secondary coolant radiator, B58 cooling upgrade, N55 cooling pack or F-Series cooling module, you have found the correct OEM solution.

BMW 1 Series

• F20 F21 LCI 09/2015 to 06/2019
  • 116i, 118i, 125i, M140i, M140ix

BMW 2 Series

• F22 F23 09/2015 to 06/2017
  • 218i, 228i, 228iX, 230i, M240i
• F22 F23 LCI 09/2016 to 12/2019
  • 218i, M240i

BMW 3 Series

• F30 02/2011 to 07/2015
  • 328i, 328iX, 335i, 335iX
• F30 LCI 09/2014 to 10/2018
  • 318i, 328i, 328iX, 330e, 330i, 335dX, 340i, 340iX
• F31 04/2013 to 06/2015
  • 335dX
• F31 LCI 09/2014 to 06/2019
  • 318i, 335dX, 340i, 340iX
• F34 GT 08/2012 to 06/2016
  • 328i, 328iX, 335dX
• F34 GT LCI 09/2015 to 12/2019
  • 335dX, 340i, 340iX

BMW 4 Series

• F32 11/2012 to 02/2017
  • 418i, 428i, 428iX, 430i, 435dX, 435i, 435iX, 440i, 440iX
• F32 LCI 05/2016 to 12/2019
  • 418i, 435dX, 440i, 440iX
• F33 11/2013 to 02/2017
  • 430i, 435dX, 440i, 440iX
• F33 LCI 05/2016 to 12/2019
  • 435dX, 440i, 440iX
• F36 Gran Coupe 07/2013 to 02/2017
  • 418i, 428i, 428iX, 430i, 435dX, 435i, 435iX, 440i, 440iX
• F36 Gran Coupe LCI 05/2016 to 12/2019
  • 418i, 430d, 435dX, 440i, 440iX

Fitting and support

Professional installation recommended. For expert fitting, coding guidance if required and model-specific advice, contact MJ Modifications in Warwickshire for a quote. Email info@mjmodifications.co.uk.

Compatibility check before dispatch

We confirm fitment before shipping. Add your UK registration or the last 7 of your VIN at checkout and we will verify compatibility for your exact F-Series model.

Part number

17117628057

Manufacturer

BMW genuine OE component

Warranty

Two years manufacturer warranty for UK customers and one year for international customers when a VIN is supplied at checkout on compatible vehicles.

Search terms customers use

F-Series cooling upgrade, BMW side radiator, BMW secondary radiator, OEM coolant heat exchanger, B58 cooling kit, N55 cooling kit, M140i cooling mod, M240i cooling pack, 335i cooling solution, 340i cooling system upgrade, 440i cooling radiator, F20 F21 F22 F23 F30 F31 F34 F32 F33 F36 rad, xDrive cooler, track day cooling, heat soak fix, direct-fit BMW radiator, factory BMW cooling module, genuine BMW part 17117628057.