Mercedes-Benz Turbocharger Control Valve A0091533128 and A0071531428 OEM Standard

If your Mercedes-Benz vehicle exhibits weak acceleration, noticeable turbo lag, engine fault light on, or a boost pressure fault code, this usually indicates the turbocharger wastegate control valve has aged or jammed and cannot precisely regulate the exhaust bypass valve opening. The valve, in normal operation, modulates turbo boost pressure according to ECU instructions to ensure smooth and efficient power output, preventing over- or under-boost. This product OEM numbers A0091533128 and A0071531428, fits many Mercedes models equipped with turbocharged engines (e.g., C-Class, E-Class, S-Class, GLK). Use OEM-standard gasket during installation and ensure no leaks between the valve and turbocharger piping; post-installation turbo system adaptive learning is required.