The Variable Valve Timing (VVT) Solenoid manages valve lift timing & oil flow within specified engine rev speeds and loads. When VVT solenoids are running normal, engine performance and fuel efficiency is optimized in all RPM ranges. A failed VVT sensor will cause intake & exhaust valves to open/close during improper times, which results in major reduced fuel economy. HL Mando VVT solenoids are OE replacement parts, same as the one found on your vehicle. Go with HL Mando VVT Solenoids to bring your car's fuel economy back to optimal – We Are OE!