X4XZ Crankcase Vent Hose for BMW 228i/320i/328i/428i — PN 11127588417, OE-fit, Heat-Resistant

X4XZ 11127588417 is a direct-fit crankcase vent hose engineered to replace the factory hose on compatible BMW 2-, 3-, 4-, 5-, X- and Z-series models and restore proper crankcase ventilation.

This replacement vent hose is built to OE-equivalent specifications to control crankcase pressure, reduce blow-by buildup, and help prevent oil leaks that can affect engine components. Made from heat- and pressure-resistant materials, the hose matches the original form and fit for a straightforward swap—no custom modifications required. Whether you're servicing a daily driver or preparing a vehicle for extended use, this part is intended to deliver reliable sealing and predictable performance.

Which BMW models will this X4XZ crankcase vent hose fit?

The X4XZ 11127588417 fits a wide range of BMW engines across model years where the original part number applies. Compatibility covers multiple 2-, 3-, 4- and 5-series variants, several X-series SUVs, and the Z4 listed in the product compatibility. Always verify with your VIN or compare with the existing hose before purchase.

• Works with: 228i (2014–2016), 228i xDrive (2015–2016)
• 3-series: 320i (2013–2017) and 328i (2012–2016) including xDrive and GT variants
• 4-series: 428i (2014–2016) and 428i Gran Coupe (2015–2016) including xDrive
• Other fits: 528i (2012–2016), X1/X3/X4/X5 variants, Z4 sDrive28i (2012–2016)

How does this hose help reduce oil leaks and related issues?

By maintaining a secure seal and controlling crankcase pressure, the replacement hose minimizes oil seepage and prevents oil from contaminating surrounding components. The material selection and manufacturing tolerances are designed to resist swelling, cracking, or collapse under temperature cycling.

• Secure mating surfaces reduce the chance of oil seepage at connections
• Heat- and pressure-resistant construction resists premature failure
• OE-style fit reduces stress on adjacent components and clamps

Is installation difficult — can I replace it myself?

Installation is intended to be user-friendly because the hose is shaped to match original routing and connection points. Basic mechanical skills and common hand tools are typically sufficient; you’ll usually remove the old hose clamps, detach the worn hose, and install the new part in reverse order.

• Direct-fit design requires no trimming or modifications
• Standard hose clamps and connectors are compatible
• Expect a short service time for accessible engine bays; more complex models may need component removal

What warranty and support does X4XZ provide for this part?

X4XZ provides a one-year product service and 24-hour customer support to address installation or quality concerns. If you encounter fitment issues or product defects, contact customer service for troubleshooting, replacement, or guidance on next steps.

• One-year product service coverage for manufacturing defects
• Responsive customer support available for installation help
• Return or replacement procedures facilitated through X4XZ support

Who is this for: This crankcase vent hose is aimed at BMW owners, independent mechanics, and service shops working on compatible 2-, 3-, 4-, 5-, X- and Z-series models that need a dependable OE-style replacement. It’s a practical option for routine maintenance, resolving oil leak symptoms, or restoring proper crankcase ventilation after age-related hose degradation. Confirm fitment using your vehicle’s VIN or compare part numbers to ensure compatibility before ordering.