5Q0133366H – Engine Vacuum Breather Hose for VW Golf Mk7, VW Passat B8, Audi A3 8V | YDU

Description

The engine vacuum breather hose forms a critical part of the crankcase ventilation system, routing blow-by gases and maintaining controlled vacuum pressure within the intake circuit. Over time, these hoses are prone to cracking, splitting, or collapsing due to prolonged heat exposure and oil vapour saturation, resulting in symptoms such as rough idle, vacuum leaks, increased oil consumption, fault codes related to boost or fuel trim (e.g. P0171, P0507), and illuminated engine warning lights. Inspect the hose and all associated clamps and connectors for signs of wear or deformation during routine servicing. Replacement requires no special tooling; ensure the engine is cool before removal and confirm the correct hose routing matches the original configuration. No specific torque specification applies to this hose — secure all clamp connections firmly by hand or with a suitable screwdriver to prevent air ingress. Recommended replacement interval: inspect every 60,000 km or sooner if symptoms are present. Also replaces: 5Q0133366F, 5Q0133366G.