Original BMW Radiator-to-Engine Coolant Hose for BMW 540i, 640i xDrive Gran Turismo, and 740i (2016–2019)

Coolant leaving the radiator reaches the B58 engine through this Original BMW hose, part 17-12-8-602-638, on the 2017–2019 BMW 540i, the 2018–2019 640i xDrive Gran Turismo, and the 2016–2019 740i, xDrive versions included. BMW names it the radiator-engine hose, which describes its job as the link between the radiator and the engine's coolant passages. A radiator hose carries coolant to and from the cooling system's components, so its condition directly affects how well heat leaves the engine. The hose weighs 310 g (0.7 lb) and is sold as a single piece.

Original BMW Parts carry a 24-month parts warranty.

BMW assigns this one hose number to the B58 versions of the G30 5 Series, the G32 6 Series Gran Turismo, and the G11 and G12 7 Series. That shared layout means a 540i owner and a 740i owner order the same part. BMW shows production of the hose starting in July 2015, ahead of the earliest model year covered here, with no end date shown in BMW's parts data.

Technical Details

• Manufacturer: BMW (Original BMW part)
• Part number: 17-12-8-602-638
• BMW part name: hose, radiator-engine
• Weight: 310 g (0.7 lb)
• Production start: July 2015
• Engine: B58
• Chassis: G30, G32, G11, and G12
• Country of manufacture: Poland
• Sold as: one piece
• Warranty: 24 months

Common Questions

What signs point to a failing radiator hose?
Cracking, leaking, swelling, and general deterioration are the common failure signs. With age, a hose can also turn dry, hard, and brittle before it starts to leak.

Where is this hose made?
It is made in Poland and supplied as a genuine BMW part.

Our parts counter can help pair this hose with the rest of your B58 cooling work.

Fitment & Compatibility

Check the table below for the exact year, model, submodel, and any listed notes. Send your VIN and PMB Performance will confirm the fit, drawing on more than 20 years in the trade.