Lincoln MKZ Secondary Air Injection Check Valve manages cold-start emissions and protects the air pump, a simple mechanical and rugged materials that many drivers rely on for the long haul. The check valve of the Secondary Air Injection Check Valve is located close to the exhaust manifold. The check valve opens only when fresh airflow specs are of a greater pressure than exhaust pressure, allowing hydrocarbons to stay low and at the same time keeping fuel mileage consistent. The MKZ Secondary Air Injection Check Valve contains a proven stainless poppet, a heat-tempered spring, and high-temp housings to withstand high-heat converter areas on Lincoln sedans produced over multiple production cycles. The first systems that utilized a belt drive system powered the original Secondary Air Injection Check Valves, while later whisper-quiet electric pumps powered them. As a result, owners of a 2007, 2013, or modern hybrid MKZ all bolt up the same check valve without modification. The fast sealing of the throttle lift prevents flashback from the exhaust to the hose and sensor. As the quick reflex indicates, drivers recommend this Secondary Air Injection Check Valve for reliability. Every unit is tested for tight leaks, allowing Lincoln to maintain federal emissions ratings without adding complexity to electronic controls. The compact unit is designed to allow plenty of room for other MKZ components, making future servicing easier. The pump life of the Secondary Air Injection Check Valve, which blocks any reverse flow, is extended considerably beyond the normal schedule. This helps with safe starts on icy mornings and smoother deceleration on steep grades. The Secondary Air Injection Check Valve will also help to keep the onboard diagnostics error codes free, something all MKZ owners will appreciate that reinforces the Lincoln tradition of hassle-free luxury. Opt for an authentic Lincoln part and the Secondary Air Injection Check Valve pays off for the powertrain with years of silent service, its precise fit across the entire lineup helping the MKZ achieve whisper-quiet efficiency that rivals far pricier luxury rivals.
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