Turbocharger Cooling Return Hose ("B"), BMW - F22 M240i, F3X 340i/440i, G30 540i, G12 740i, X3/X4 M40i, B58

This part is listed by BMW as BMW part number 11538666857 (11 53 8 666 857) and is described as the coolant return hose running from the turbo coolant pipe to the aux water pump in F22 M240i, F3X 340i/440i, G30 540i, G12 740i, G01 X3 AND G02 X4 M40i models. It's #3 in ETK/RealOEM parts diagrams. There are two sections of this hose and this is the one closest to the water pump (section B).

The B58A turbo cooling has a complicated layout. The pump and hoses are on the left side (intake side) and mounted to the oil filter housing. It pulls coolant from the turbo around the back of the engine block to the oil filter housing. Coolant is fed from the right side of the engine block (which is the cool side in the B58 layout).

This is a Genuine BMW B58 turbo cooling hose with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.

BMW Fitments:

2 Series
F22 / F23 (2014-2021) > M240i
F22 / F23 (2014-2021) > M240i xDrive
3 Series
F30 / F31 / F34 (2012-2019) > 340i
F30 / F31 / F34 (2012-2019) > 340i xDrive
4 Series
F32 / F33 / F36 (14-20) > 440i
F32 / F33 / F36 (14-20) > 440i xDrive
5 Series
G30 (2017-2022) > 540i (B58A 2017-2019)
G30 (2017-2022) > 540i xDrive (B58A 2017-2019)
7 Series
G12 (2016+) > 740i
G12 (2016+) > 740i xDrive
X3 Series
G01 X3 (2018+) > X3 M40i
X4 Series
G02 X4 (2019+) > X4 M40i