Original BMW Crankcase Vent Hose for N55 BMW 135i, 335i, 640i, 740i, X1, X5, and X6 (2011–2019)

Original BMW crankcase vent hose 11-12-7-590-163 is a breather hose in the crankcase ventilation system of N55-powered BMW models, including the 135i, 335i, 640i, 740i, X1, X5, and X6 built from 2011 through 2019. BMW calls it simply the vent hose and gives its weight as 46 g, . It is made in Austria and sold as a single piece. Crankcase pressure is a normal byproduct of combustion, and this hose forms part of the path that carries those vapors toward the air/oil separator so the gases are burned in the intake instead of escaping. Constant exposure to oil vapor, heat, and pressure makes breather hoses a common failure point in this system.

Original BMW Parts carry a 24-month parts warranty.

BMW's parts data shows this hose entering production in March 2010 and ties it only to the N55 six-cylinder. Across the range it covers the E82 and E88 1 Series, the facelift E90, E91, E92, and E93 3 Series, the F06, F12, and F13 6 Series, the facelift F01 and F02 7 Series including the ActiveHybrid 7, the E84 X1, the F15 X5, and the F16 X6. The common thread is the engine, so an N55 under the hood is the first thing to check.

Technical Details

• Manufacturer: BMW
• Part number: 11-12-7-590-163
• BMW part name: Vent hose
• Engine: N55 six-cylinder
• Weight: 46 g (0.1 lb)
• Production start: March 2010
• Country of manufacture: Austria
• Sold individually
• Warranty: 24 months on Original BMW Parts

Common Questions

What are the signs this vent hose has failed?
A cracked or split hose lets unmetered air into the intake, which can set a check engine light for an air leak and, in severe cases, cause rough running or a misfire. Oil residue and moisture on the hose and nearby engine surfaces are another common sign.

Why do these hoses crack?
Oil vapor, heat, and pressure slowly break down the hose material over time. The plastic securing clips and connectors also turn brittle and can break during removal or other service work.

Fitment & Compatibility

Confirm your model year and submodel against the table below before ordering. PMB Performance can confirm this against your VIN, backed by more than 20 years of parts and fitment work.