Genuine BMW F-Series Remote/Auxiliary Radiator F20 F21 F22 F30 F32 F36 F87 | M140i M240i 340i 430i 440i M2 | OEM 17118625447

BMW F‑Series Secondary Heat Exchanger | OE Part No. 17118625447

Unlock reliable temperature control on your F‑chassis BMW with this original BMW secondary heat exchanger, OE part number 17118625447. This factory component adds cooling capacity alongside the main radiator to keep coolant temperatures consistent during spirited driving, fast road use and track time, all while retaining perfect OEM fit, durability and integration.

Why this OE cooling upgrade works

• Original BMW part for exact fitment with factory mounts, shrouds and pipework
• Extra thermal headroom for remapped and hard‑driven cars
• Stabilises coolant temps in demanding conditions for consistent performance
• No compromise on reliability, build quality or service life

Proven by us

At MJ Modifications we install and run this cooler on our own cars and customer builds. Fit and finish are spot on, and customer feedback has been consistently positive for those wanting a genuine BMW solution that simply works.

Compatibility

Direct replacement on BMW F‑Series models equipped with the corresponding cooling package:

• 1 Series
  • F20, F21 LCI 09/2015 to 06/2019
    • M140i, M140i xDrive
• 2 Series
  • F22 09/2015 to 06/2017
    • M240i, M240i xDrive
  • F22 LCI 09/2016 to 12/2019
    • M240i, M240i xDrive
  • F87 11/2014 to 06/2017
    • M2
  • F87 LCI 09/2016 to 06/2018
    • M2
• 3 Series
  • F30 LCI 09/2014 to 10/2018
    • 340i, 340i xDrive
  • F34 Gran Turismo LCI 09/2015 to 12/2019
    • 340i, 340i xDrive
• 4 Series
  • F32 11/2012 to 02/2017
    • 430i, 430i xDrive, 440i, 440i xDrive
  • F32 LCI 05/2016 to 12/2019
    • 430i, 430i xDrive, 440i, 440i xDrive
  • F36 Gran Coupé 07/2013 to 02/2017
    • 430i, 430i xDrive, 440i, 440i xDrive
  • F36 Gran Coupé LCI 05/2016 to 12/2019
    • 430i, 430i xDrive, 440i, 440i xDrive

Note: suitability depends on the vehicle’s factory cooling package. If unsure, use our fitment check below.

Part details

• BMW OE number: 17118625447
• Manufacturer: BMW
• Type: secondary heat exchanger, aux cooler, additional coolant radiator

Compatibility check before dispatch

We verify fitment before shipping so you receive the correct component. Provide your UK registration or the last 7 digits of your VIN at checkout.

Professional installation

Want it fitted by specialists? Book installation with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Warranty

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

Search terms customers use

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