Original BMW Coolant Pump Hose (Charge-Air Cooler Circuit) for B58 BMW 340i, 440i, and M240i, 2016–2021

BMW's coolant pump hose 17-12-8-634-284 is a hose in the charge-air cooler coolant circuit of B58-powered M240i, 340i, and 440i models. It carries coolant between the pump and the intercooling system on these turbocharged six-cylinder cars. BMW places the part in its charge-air cooler group, and production started in July 2015. The hose weighs 179 grams and is made in Germany. Over time a coolant hose can harden, swell, or crack, and leaking, cracking, swelling, or general deterioration are the signs that it needs replacing.

Original BMW Parts carry a 24-month parts warranty.

Many B58 engines share this single part number across several chassis. BMW applies it to the F22 and F23 2 Series, the F30, F31, and F34 Gran Turismo 3 Series facelift cars, and the F32, F33, and F36 4 Series, on both rear-drive and xDrive versions. BMW places this hose in its charge-air cooler group. When replacing this hose, a coolant flush and refill is recommended to clear out any sludge that has built up.

Technical Details

• Manufacturer: BMW
• Part number: 17-12-8-634-284
• BMW part name: hose, coolant pump
• System: charge-air cooler coolant circuit
• Engine: B58
• Weight: 179 g
• Production from July 2015
• Made in Germany
• Sold individually
• Warranty: 24-month coverage on Original BMW Parts

Common Questions

What are the signs this hose has failed?
Look for cracking, leaking, swelling, or a hose that has turned dry, hard, or brittle.

Is this the same hose on xDrive cars?
Yes. BMW uses this part on both the rear-drive and xDrive B58 versions shown in the fitment.

PMB can help you match this hose to your B58 car.

Fitment & Compatibility

Use the table below to verify the year and submodel for your build. With over 20 years of parts and fitment experience, PMB Performance can match this to your VIN.