Original BMW Charge-Air Cooler Coolant Pump Hose for BMW 230i, 330i, and 430i (2017–2021)

BMW's coolant pump hose 17-12-8-634-285 is an Original BMW hose in the charge-air cooler coolant circuit of the B46 and B48 four-cylinder BMW 230i, 330i, and 430i from 2017–2021. Engines with a liquid-cooled charge-air cooler run a separate coolant loop with its own pump, and hoses like this one carry coolant between that pump and the cooler. BMW gives a weight of 153 g (0.3 lb), and the hose is sold as one piece, made in Germany. Age leaves coolant hoses dry, hard, or brittle, and the usual warning signs are cracking, leaking, swelling, and general deterioration.

Original BMW Parts carry a 24-month parts warranty.

BMW put this hose into production in July 2015 and assigns it to the charge-air cooler section of the cooling system, separate from the main engine radiator hoses on the same cars. When shopping, match the part to that circuit rather than to a radiator hose of similar shape. It is used across the F22, F23 Cabrio, F30 facelift, F34 GT, F32, F33, and F36 Gran Coupe.

Technical Details

• Manufacturer: BMW
• Part number: 17-12-8-634-285
• BMW name: hose, coolant pump
• Circuit: charge-air cooler
• Engines: B46 and B48
• Weight: 153 g (0.3 lb)
• Sold as: one piece
• Production start: July 2015
• Country of manufacture: Germany
• Warranty: 24 months on Original BMW Parts

Common Questions

Is this a radiator hose?
No. BMW places it in the charge-air cooler circuit, fed by the coolant pump for that loop.

How do I know the hose needs replacing?
Look for cracking, leaking, swelling, or a dry, hard, brittle feel.

Fitment & Compatibility

Compare your production year and trim against the table below. Send your VIN and PMB Performance will confirm the fit, drawing on more than 20 years in the trade.