Maintain your Range Rover’s emissions system with this high-quality Secondary Air Injection Valve, engineered for 1999–2002 Range Rover 4.0SE and 4.6HSE models. This genuine replacement part ensures your vehicle meets emission standards and runs efficiently, especially during cold starts.
The Secondary Air Injection Valve is a critical part of the Secondary Air Injection (SAI) system, which works to reduce harmful emissions by injecting fresh air into the exhaust system during engine warm-up. This allows the catalytic converter to reach optimal operating temperature faster, minimizing the release of pollutants.
This specific valve is designed to fit both the left and right sides of the engine, offering convenience and versatility in one part. Whether you're replacing a failed valve or doing preventive maintenance, this part will help keep your vehicle in top emissions compliance.
The SAI system is part of the vehicle's emissions control strategy. When your Range Rover is started cold, the system sends clean, pressurized air into the exhaust stream. This additional oxygen helps burn off uncombusted fuel and reduces emissions before the catalytic converter is fully warmed up.
A failing or clogged Secondary Air Injection Valve can cause poor engine performance, rough starts, increased emissions, and a check engine light.
Over time, carbon buildup or valve failure can reduce airflow and disrupt the function of the entire SAI system. Replacing the valve restores proper function, improves engine efficiency, and prevents potential emission test failures or diagnostic trouble codes (DTCs).