Intake manifold control valve — direct replacement for these BMW models: 325Ci 2.5 L (2001–2005) 325i 2.5 L 325xi 2.5 L 525i 2.5 L (2001–2004) 320i 2.2 L (2004–2006) X3 2.5 L / 3.0 L (2003–2005) Z4 2.5 L / 3.0 L (Additional compatible models and years are listed in the product description.) Why you need this part Restores accurate intake airflow control so the engine can maintain the correct air–fuel mixture. Reduces rough idle, hesitation and power loss caused by a failing intake control valve. Returns predictable throttle response and steadier acceleration under varying load and RPM. Key benefits Precise airflow regulation: adjusts intake flow across engine speeds to support smoother throttle response and more consistent combustion. Improved engine stability: helps maintain an optimal air–fuel ratio for better drivability and reduced throttle lag. Troubleshooting and repair: practical direct-replacement solution when symptoms indicate a faulty intake/control valve — restores proper feedback to the engine management system. Core features and attributes Function: intake manifold/airflow control valve that regulates air into the intake system to optimize combustion. Fit and compatibility: designed as a direct replacement for the listed BMW models; consult the full product description for any additional compatible years or variants. Construction: manufactured to match original factory specifications (OEM-equivalent fit and function) for plug-and-play installation. Performance: supports stable engine behavior across different RPM ranges and load conditions; helps improve efficiency and acceleration consistency. Practical use scenarios 1) Rough idle or unstable engine speed: replace the valve to restore steady idle and eliminate surging caused by inconsistent intake flow. 2) Hesitation or reduced acceleration under load: fit this valve to regain smoother throttle response and reduce delay during overtaking or uphill driving. 3) Diagnostic replacement during maintenance: when intake control diagnostics indicate the valve is compromised, install this direct-fit unit to reestablish correct sensor feedback and engine control. Installation and notes Direct-replacement part intended to match original dimensions and mounting points for the listed models. For correct fit, confirm model and production year against the compatibility list in the product description before ordering.